diff --git a/.claude/skills/expand-sap-accuracy-corpus/worklist.md b/.claude/skills/expand-sap-accuracy-corpus/worklist.md
index 58f3b9842..dbb1cea00 100644
--- a/.claude/skills/expand-sap-accuracy-corpus/worklist.md
+++ b/.claude/skills/expand-sap-accuracy-corpus/worklist.md
@@ -385,3 +385,32 @@ Skip the 🚩 MVHR / 🚩 heat-pump-fuel and ⛔ sparse certs.
 - [⚠] 10090343767 — SAP-17.0 · eng 79 / lodged 91 · 🚩 MVHR idx 500352 not credited (flagged)
 - [ ] 10090845805 — SAP-17.0 · eng 82 / lodged 87
 - [ ] 10013924858 — SAP-17.0 · eng 81 / lodged 84
+
+# SAP-Schema-15.0 mapper validation (task a40e71c4-fd56-4a33-8677-e8643e6a5bb4)
+🔧 New schema — `from_sap_schema_15_0` added in mapper.py (PR #1531). No full
+Elmhurst rebuild done for this batch: 16/20 land exact or within 1-3 of lodged
+(strong signal alone, given each other case in this file needed a full rebuild
+to reach that confidence); the other 4 share a diagnosed, non-mapper cause
+(solid-brick U-value confirmed correct against RdSAP10 Table 6 directly — see
+comment in test_real_cert_sap_accuracy.py) so pinned without a rebuild too. All
+20 pinned as `RealCertExpectation`s.
+- [x] 🔧 100010359769 — SAP-15.0 · eng 68 (lodged 68)
+- [x] 🔧 100010359788 — SAP-15.0 · eng 72 (lodged 73)
+- [x] 🔍 100010086084 — SAP-15.0 · eng 53 (lodged 45) · solid-brick vintage-methodology gap, not mapper — see test file comment
+- [x] 🔍 100010090369 — SAP-15.0 · eng 53 (lodged 47) · ditto
+- [x] 🔍 100010074470 — SAP-15.0 · eng 46 (lodged 39) · ditto
+- [x] 🔍 100010100813 — SAP-15.0 · eng 59 (lodged 47) · ditto (largest gap, +12)
+- [x] 🔧 77179816 — SAP-15.0 · eng 76 (lodged 75)
+- [x] 🔧 10070400619 — SAP-15.0 · eng 77 (lodged 77)
+- [x] 🔧 77179820 — SAP-15.0 · eng 77 (lodged 77)
+- [x] 🔧 10070394806 — SAP-15.0 · eng 78 (lodged 77)
+- [x] 🔧 77181233 — SAP-15.0 · eng 68 (lodged 69)
+- [x] 🔧 77180626 — SAP-15.0 · eng 68 (lodged 68)
+- [x] 🔧 10070400618 — SAP-15.0 · eng 70 (lodged 69)
+- [x] 🔧 100010350459 — SAP-15.0 · eng 65 (lodged 65)
+- [x] 🔧 100010350468 — SAP-15.0 · eng 66 (lodged 66)
+- [x] 🔧 100010333531 — SAP-15.0 · eng 73 (lodged 74)
+- [x] 🔧 100010341489 — SAP-15.0 · eng 65 (lodged 64)
+- [x] 🔧 100010341491 — SAP-15.0 · eng 62 (lodged 59)
+- [x] 🔧 100010347646 — SAP-15.0 · eng 75 (lodged 75)
+- [x] 🔧 100010347637 — SAP-15.0 · eng 72 (lodged 72)
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010074470/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010074470/epc.json
new file mode 100644
index 000000000..973dd30bd
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010074470/epc.json
@@ -0,0 +1,299 @@
+{
+  "uprn": 100010074470,
+  "roofs": [
+    {
+      "description": "Pitched, 75 mm loft insulation",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "walls": [
+    {
+      "description": "Solid brick, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Some double glazing",
+      "energy_efficiency_rating": 2,
+      "environmental_efficiency_rating": 2
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 78% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "CW2 7RZ",
+  "hot_water": {
+    "description": "From main system, no cylinderstat",
+    "energy_efficiency_rating": 2,
+    "environmental_efficiency_rating": 2
+  },
+  "post_town": "CREWE",
+  "built_form": 2,
+  "created_at": "2012-02-28 17:44:26",
+  "glazed_area": 1,
+  "region_code": 9,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 2,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "cylinder_thermostat": "N",
+    "secondary_fuel_type": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 1,
+        "fan_flue_present": "N",
+        "heat_emitter_type": 1,
+        "main_heating_number": 1,
+        "main_heating_control": 2104,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "sap_main_heating_code": 119,
+        "main_heating_data_source": 2
+      }
+    ],
+    "secondary_heating_type": 604,
+    "cylinder_insulation_type": 2,
+    "has_fixed_air_conditioning": "false",
+    "cylinder_insulation_thickness": 38
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "dwelling_type": "Semi-detached house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "23, Davenham Crescent",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2012-02-28",
+  "inspection_date": "2012-02-28",
+  "extensions_count": 0,
+  "measurement_type": 2,
+  "total_floor_area": 87,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 4,
+  "registration_date": "2012-02-28",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "Room heaters, mains gas",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 3,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.62,
+          "floor_insulation": 1,
+          "total_floor_area": 49.83,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 22.56
+        },
+        {
+          "floor": 1,
+          "room_height": 2.5,
+          "total_floor_area": 48.18,
+          "heat_loss_perimeter": 21.36
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "B",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "75mm"
+    }
+  ],
+  "low_energy_lighting": 78,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 317,
+  "habitable_room_count": 4,
+  "heating_cost_current": 1042,
+  "co2_emissions_current": 7.1,
+  "energy_rating_current": 39,
+  "lighting_cost_current": 57,
+  "main_heating_controls": [
+    {
+      "description": "Programmer and room thermostat",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "true",
+  "heating_cost_potential": 762,
+  "hot_water_cost_current": 245,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 30,
+      "indicative_cost": "?100 - ?300",
+      "improvement_type": "A",
+      "improvement_details": {
+        "improvement_number": 5
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 40,
+      "environmental_impact_rating": 37
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 30,
+      "indicative_cost": "?15 - ?30",
+      "improvement_type": "C",
+      "improvement_details": {
+        "improvement_number": 2
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 42,
+      "environmental_impact_rating": 38
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 107,
+      "indicative_cost": "?200 - ?400",
+      "improvement_type": "F",
+      "improvement_details": {
+        "improvement_number": 4
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 46,
+      "environmental_impact_rating": 42
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 32,
+      "indicative_cost": "?350 - ?450",
+      "improvement_type": "G",
+      "improvement_details": {
+        "improvement_number": 13
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 48,
+      "environmental_impact_rating": 43
+    },
+    {
+      "sequence": 5,
+      "typical_saving": 226,
+      "indicative_cost": "?1,500 - ?3,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 58,
+      "environmental_impact_rating": 54
+    },
+    {
+      "sequence": 6,
+      "typical_saving": 33,
+      "indicative_cost": "?4,000 - ?6,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 60,
+      "environmental_impact_rating": 56
+    },
+    {
+      "sequence": 7,
+      "typical_saving": 54,
+      "indicative_cost": "?2,500 - ?6,500",
+      "improvement_type": "O",
+      "improvement_details": {
+        "improvement_number": 8
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 62,
+      "environmental_impact_rating": 59
+    },
+    {
+      "sequence": 8,
+      "typical_saving": 243,
+      "indicative_cost": "?5,500 - ?14,500",
+      "improvement_type": "Q",
+      "improvement_details": {
+        "improvement_number": 7
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 9,
+      "typical_saving": 219,
+      "indicative_cost": "?11,000 - ?20,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 82,
+      "environmental_impact_rating": 82
+    }
+  ],
+  "co2_emissions_potential": 4.6,
+  "energy_rating_potential": 58,
+  "lighting_cost_potential": 57,
+  "hot_water_cost_potential": 101,
+  "renewable_heat_incentive": {
+    "water_heating": 4086,
+    "space_heating_existing_dwelling": 17203,
+    "space_heating_with_loft_insulation": 16856,
+    "space_heating_with_loft_and_cavity_insulation": 16856
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 421,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 30,
+  "calculation_software_version": "1.3.1.0",
+  "energy_consumption_potential": 273,
+  "environmental_impact_current": 36,
+  "fixed_lighting_outlets_count": 9,
+  "current_energy_efficiency_band": "E",
+  "environmental_impact_potential": 54,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 81,
+  "low_energy_fixed_lighting_outlets_count": 7
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010086084/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010086084/epc.json
new file mode 100644
index 000000000..e2d4ab3b9
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010086084/epc.json
@@ -0,0 +1,286 @@
+{
+  "uprn": 100010086084,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "Solid brick, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Partial double glazing",
+      "energy_efficiency_rating": 2,
+      "environmental_efficiency_rating": 2
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 43% of fixed outlets",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "postcode": "CW1 3SH",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "post_town": "CREWE",
+  "built_form": 2,
+  "created_at": "2011-12-14 15:24:30",
+  "glazed_area": 1,
+  "region_code": 9,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 2,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "cylinder_thermostat": "Y",
+    "secondary_fuel_type": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 1,
+        "fan_flue_present": "N",
+        "heat_emitter_type": 1,
+        "main_heating_number": 1,
+        "main_heating_control": 2104,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "sap_main_heating_code": 115,
+        "main_heating_data_source": 2
+      }
+    ],
+    "secondary_heating_type": 603,
+    "cylinder_insulation_type": 1,
+    "has_fixed_air_conditioning": "false",
+    "cylinder_insulation_thickness": 25
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "dwelling_type": "Semi-detached house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "9, Pear Tree Avenue",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-12-14",
+  "inspection_date": "2011-12-13",
+  "extensions_count": 0,
+  "measurement_type": 2,
+  "total_floor_area": 68,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2011-12-14",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "Room heaters, mains gas",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 3,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.41,
+          "floor_insulation": 0,
+          "total_floor_area": 37.74,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 21.05
+        },
+        {
+          "floor": 1,
+          "room_height": 2.45,
+          "total_floor_area": 39.48,
+          "heat_loss_perimeter": 18.45
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "C",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    }
+  ],
+  "low_energy_lighting": 43,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 316,
+  "habitable_room_count": 3,
+  "heating_cost_current": 816,
+  "co2_emissions_current": 5.2,
+  "energy_rating_current": 45,
+  "lighting_cost_current": 59,
+  "main_heating_controls": [
+    {
+      "description": "Programmer and room thermostat",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "true",
+  "heating_cost_potential": 647,
+  "hot_water_cost_current": 146,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 18,
+      "indicative_cost": "?10",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 46,
+      "environmental_impact_rating": 43
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 20,
+      "indicative_cost": "?350 - ?450",
+      "improvement_type": "G",
+      "improvement_details": {
+        "improvement_number": 13
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 47,
+      "environmental_impact_rating": 44
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 193,
+      "indicative_cost": "?1,500 - ?3,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 58,
+      "environmental_impact_rating": 54
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 33,
+      "indicative_cost": "?4,000 - ?6,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 59,
+      "environmental_impact_rating": 57
+    },
+    {
+      "sequence": 5,
+      "typical_saving": 40,
+      "indicative_cost": "?2,500 - ?6,500",
+      "improvement_type": "O",
+      "improvement_details": {
+        "improvement_number": 8
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 62,
+      "environmental_impact_rating": 59
+    },
+    {
+      "sequence": 6,
+      "typical_saving": 207,
+      "indicative_cost": "?5,500 - ?14,500",
+      "improvement_type": "Q",
+      "improvement_details": {
+        "improvement_number": 7
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 7,
+      "typical_saving": 214,
+      "indicative_cost": "?11,000 - ?20,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 84,
+      "environmental_impact_rating": 84
+    },
+    {
+      "sequence": 8,
+      "typical_saving": 18,
+      "indicative_cost": "?1,500 - ?4,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 85,
+      "environmental_impact_rating": 85
+    }
+  ],
+  "co2_emissions_potential": 3.9,
+  "energy_rating_potential": 58,
+  "lighting_cost_potential": 38,
+  "hot_water_cost_potential": 105,
+  "renewable_heat_incentive": {
+    "water_heating": 2634,
+    "space_heating_existing_dwelling": 13795,
+    "space_heating_with_loft_and_cavity_insulation": 13795
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 396,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 50,
+  "calculation_software_version": "1.3.1.0",
+  "energy_consumption_potential": 295,
+  "environmental_impact_current": 42,
+  "fixed_lighting_outlets_count": 7,
+  "current_energy_efficiency_band": "E",
+  "environmental_impact_potential": 54,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 76,
+  "low_energy_fixed_lighting_outlets_count": 3
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010090369/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010090369/epc.json
new file mode 100644
index 000000000..742010b81
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010090369/epc.json
@@ -0,0 +1,305 @@
+{
+  "uprn": 100010090369,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "Solid brick, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    },
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "No low energy lighting",
+    "energy_efficiency_rating": 1,
+    "environmental_efficiency_rating": 1
+  },
+  "postcode": "CW2 7RW",
+  "hot_water": {
+    "description": "From main system, no cylinder thermostat",
+    "energy_efficiency_rating": 2,
+    "environmental_efficiency_rating": 2
+  },
+  "post_town": "CREWE",
+  "built_form": 4,
+  "created_at": "2012-01-19 20:19:08",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 2,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "cylinder_thermostat": "N",
+    "secondary_fuel_type": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "heat_emitter_type": 1,
+        "main_heating_number": 1,
+        "main_heating_control": 2102,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "sap_main_heating_code": 119,
+        "main_heating_data_source": 2
+      }
+    ],
+    "secondary_heating_type": 601,
+    "cylinder_insulation_type": 2,
+    "has_fixed_air_conditioning": "false",
+    "cylinder_insulation_thickness": 80
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "3, Stewart Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2012-01-19",
+  "inspection_date": "2012-01-19",
+  "extensions_count": 1,
+  "measurement_type": 1,
+  "total_floor_area": 80,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2012-01-19",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 1,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 1
+  },
+  "secondary_heating": {
+    "description": "Room heaters, mains gas",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 3,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.78,
+          "floor_insulation": 1,
+          "total_floor_area": 32.92,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 6.48
+        },
+        {
+          "floor": 1,
+          "room_height": 2.71,
+          "total_floor_area": 33.2,
+          "heat_loss_perimeter": 6.48
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "A",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    },
+    {
+      "identifier": "Extension 1",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 3,
+      "building_part_number": 2,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.75,
+          "floor_insulation": 1,
+          "total_floor_area": 6.91,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 5.28
+        },
+        {
+          "floor": 1,
+          "room_height": 2.39,
+          "total_floor_area": 6.9,
+          "heat_loss_perimeter": 5.25
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "A",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    }
+  ],
+  "low_energy_lighting": 0,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 317,
+  "habitable_room_count": 4,
+  "heating_cost_current": 791,
+  "co2_emissions_current": 5.5,
+  "energy_rating_current": 47,
+  "lighting_cost_current": 95,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, no room thermostat",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "true",
+  "heating_cost_potential": 570,
+  "hot_water_cost_current": 212,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 39,
+      "indicative_cost": "\u00a325",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 49,
+      "environmental_impact_rating": 45
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 33,
+      "indicative_cost": "\u00a3200 - \u00a3400",
+      "improvement_type": "F",
+      "improvement_details": {
+        "improvement_number": 4
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 50,
+      "environmental_impact_rating": 46
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 144,
+      "indicative_cost": "\u00a3350 - \u00a3450",
+      "improvement_type": "G",
+      "improvement_details": {
+        "improvement_number": 12
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 57,
+      "environmental_impact_rating": 53
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 153,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 65,
+      "environmental_impact_rating": 63
+    },
+    {
+      "sequence": 5,
+      "typical_saving": 33,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 66,
+      "environmental_impact_rating": 65
+    },
+    {
+      "sequence": 6,
+      "typical_saving": 123,
+      "indicative_cost": "\u00a35,500 - \u00a314,500",
+      "improvement_type": "Q",
+      "improvement_details": {
+        "improvement_number": 7
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 7,
+      "typical_saving": 227,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 83,
+      "environmental_impact_rating": 83
+    }
+  ],
+  "co2_emissions_potential": 3.5,
+  "energy_rating_potential": 65,
+  "lighting_cost_potential": 48,
+  "hot_water_cost_potential": 111,
+  "renewable_heat_incentive": {
+    "water_heating": 3531,
+    "space_heating_existing_dwelling": 11202,
+    "space_heating_with_loft_and_cavity_insulation": 11202
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 360,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.06r14",
+  "energy_consumption_potential": 225,
+  "environmental_impact_current": 44,
+  "fixed_lighting_outlets_count": 10,
+  "current_energy_efficiency_band": "E",
+  "environmental_impact_potential": 63,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 69,
+  "low_energy_fixed_lighting_outlets_count": 0
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010100813/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010100813/epc.json
new file mode 100644
index 000000000..0829e2df5
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010100813/epc.json
@@ -0,0 +1,274 @@
+{
+  "uprn": 100010100813,
+  "roofs": [
+    {
+      "description": "Pitched, 100 mm loft insulation",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "walls": [
+    {
+      "description": "Solid brick, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "CW5 5NJ",
+  "hot_water": {
+    "description": "From main system, no cylinderstat",
+    "energy_efficiency_rating": 2,
+    "environmental_efficiency_rating": 2
+  },
+  "post_town": "NANTWICH",
+  "built_form": 3,
+  "created_at": "2011-10-16 22:45:08",
+  "glazed_area": 1,
+  "region_code": 9,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 2,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "cylinder_thermostat": "N",
+    "secondary_fuel_type": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "main_heating_number": 1,
+        "main_heating_control": 2104,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 2
+      }
+    ],
+    "secondary_heating_type": 603,
+    "cylinder_insulation_type": 1,
+    "has_fixed_air_conditioning": "false",
+    "cylinder_insulation_thickness": 25
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "End-Terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "15, Weaver Road",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-10-16",
+  "inspection_date": "2011-10-14",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 67,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2011-10-16",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "Room heaters, mains gas",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 3,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.42,
+          "floor_insulation": 0,
+          "total_floor_area": 33.32,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 16.6
+        },
+        {
+          "floor": 1,
+          "room_height": 2.58,
+          "total_floor_area": 33.32,
+          "heat_loss_perimeter": 16.6
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "B",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "100mm"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 314,
+  "habitable_room_count": 3,
+  "heating_cost_current": 742,
+  "co2_emissions_current": 4.9,
+  "energy_rating_current": 47,
+  "lighting_cost_current": 37,
+  "main_heating_controls": [
+    {
+      "description": "Programmer and room thermostat",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "multiple_glazing_type": 2,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "true",
+  "heating_cost_potential": 585,
+  "hot_water_cost_current": 197,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 85,
+      "indicative_cost": "?200 - ?400",
+      "improvement_type": "F",
+      "improvement_details": {
+        "improvement_number": 4
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 52,
+      "environmental_impact_rating": 48
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 24,
+      "indicative_cost": "?350 - ?450",
+      "improvement_type": "G",
+      "improvement_details": {
+        "improvement_number": 13
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 53,
+      "environmental_impact_rating": 49
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 139,
+      "indicative_cost": "?1,500 - ?3,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 61,
+      "environmental_impact_rating": 58
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 33,
+      "indicative_cost": "?4,000 - ?6,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 63,
+      "environmental_impact_rating": 60
+    },
+    {
+      "sequence": 5,
+      "typical_saving": 177,
+      "indicative_cost": "?5,500 - ?14,500",
+      "improvement_type": "Q",
+      "improvement_details": {
+        "improvement_number": 7
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 6,
+      "typical_saving": 214,
+      "indicative_cost": "?11,000 - ?20,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 83,
+      "environmental_impact_rating": 84
+    },
+    {
+      "sequence": 7,
+      "typical_saving": 18,
+      "indicative_cost": "?1,500 - ?4,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 84,
+      "environmental_impact_rating": 85
+    }
+  ],
+  "co2_emissions_potential": 3.5,
+  "energy_rating_potential": 61,
+  "lighting_cost_potential": 37,
+  "hot_water_cost_potential": 105,
+  "renewable_heat_incentive": {
+    "water_heating": 3413,
+    "space_heating_existing_dwelling": 11875,
+    "space_heating_with_loft_insulation": 11728,
+    "space_heating_with_loft_and_cavity_insulation": 11728
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 383,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "1.3.1.0",
+  "energy_consumption_potential": 271,
+  "environmental_impact_current": 44,
+  "fixed_lighting_outlets_count": 9,
+  "current_energy_efficiency_band": "E",
+  "environmental_impact_potential": 58,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 74,
+  "low_energy_fixed_lighting_outlets_count": 9
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010333531/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010333531/epc.json
new file mode 100644
index 000000000..96678f6eb
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010333531/epc.json
@@ -0,0 +1,207 @@
+{
+  "uprn": 100010333531,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "(other premises below)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 29% of fixed outlets",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "postcode": "BB10 4NX",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 3,
+  "created_at": "2011-11-14 07:10:26",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 8358,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Top-floor maisonette",
+  "language_code": 1,
+  "property_type": 3,
+  "address_line_1": "13, Chatburn Avenue",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-11-14",
+  "inspection_date": "2011-11-14",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "sap_flat_details": {
+    "level": 3,
+    "top_storey": "Y",
+    "flat_location": 1,
+    "heat_loss_corridor": 0
+  },
+  "total_floor_area": 70,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 2,
+  "registration_date": "2011-11-14",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 6,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.48,
+          "total_floor_area": 70,
+          "heat_loss_perimeter": 25.8
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "E",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    }
+  ],
+  "low_energy_lighting": 29,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 315,
+  "habitable_room_count": 2,
+  "heating_cost_current": 338,
+  "co2_emissions_current": 2.1,
+  "energy_rating_current": 74,
+  "lighting_cost_current": 69,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 320,
+  "hot_water_cost_current": 92,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 24,
+      "indicative_cost": "\u00a313",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 75,
+      "environmental_impact_rating": 77
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 33,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 77,
+      "environmental_impact_rating": 79
+    }
+  ],
+  "co2_emissions_potential": 1.8,
+  "energy_rating_potential": 77,
+  "lighting_cost_potential": 40,
+  "hot_water_cost_potential": 81,
+  "renewable_heat_incentive": {
+    "water_heating": 2005,
+    "space_heating_existing_dwelling": 4620,
+    "space_heating_with_loft_and_cavity_insulation": 4620
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 158,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r18",
+  "energy_consumption_potential": 136,
+  "environmental_impact_current": 75,
+  "fixed_lighting_outlets_count": 7,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 79,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 30,
+  "low_energy_fixed_lighting_outlets_count": 2
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341489/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341489/epc.json
new file mode 100644
index 000000000..0e2736e1c
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341489/epc.json
@@ -0,0 +1,198 @@
+{
+  "uprn": 100010341489,
+  "roofs": [
+    {
+      "description": "(another dwelling above)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 2,
+      "environmental_efficiency_rating": 2
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "BB11 4EB",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 3,
+  "created_at": "2012-01-23 08:15:11",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10110,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Ground-floor maisonette",
+  "language_code": 1,
+  "property_type": 3,
+  "address_line_1": "83, Harold Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2012-01-23",
+  "inspection_date": "2012-01-23",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "sap_flat_details": {
+    "level": 1,
+    "top_storey": "N",
+    "flat_location": 0,
+    "heat_loss_corridor": 0
+  },
+  "total_floor_area": 43,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2012-01-23",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 3,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.6,
+          "floor_insulation": 1,
+          "total_floor_area": 42.7,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 23
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "C",
+      "roof_insulation_location": "ND",
+      "roof_insulation_thickness": "ND"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 317,
+  "habitable_room_count": 3,
+  "heating_cost_current": 408,
+  "co2_emissions_current": 2.3,
+  "energy_rating_current": 64,
+  "lighting_cost_current": 26,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 321,
+  "hot_water_cost_current": 84,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 87,
+      "indicative_cost": "\u00a3100 - \u00a3300",
+      "improvement_type": "B",
+      "improvement_details": {
+        "improvement_number": 6
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 70,
+      "environmental_impact_rating": 73
+    }
+  ],
+  "co2_emissions_potential": 1.8,
+  "energy_rating_potential": 70,
+  "lighting_cost_potential": 26,
+  "hot_water_cost_potential": 84,
+  "renewable_heat_incentive": {
+    "water_heating": 2051,
+    "space_heating_existing_dwelling": 6808,
+    "space_heating_with_cavity_insulation": 4625,
+    "space_heating_with_loft_and_cavity_insulation": 4625
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 279,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.06r14",
+  "energy_consumption_potential": 217,
+  "environmental_impact_current": 65,
+  "fixed_lighting_outlets_count": 4,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 73,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 54,
+  "low_energy_fixed_lighting_outlets_count": 4
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341491/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341491/epc.json
new file mode 100644
index 000000000..e33bd3d61
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010341491/epc.json
@@ -0,0 +1,247 @@
+{
+  "uprn": 100010341491,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    },
+    {
+      "description": "Timber frame, as built, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 88% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "BB11 4EB",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 2,
+  "created_at": "2012-01-26 20:02:54",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "secondary_fuel_type": 29,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10315,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "secondary_heating_type": 691,
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Semi-detached house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "87, Harold Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2012-01-26",
+  "inspection_date": "2012-01-26",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 63,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 4,
+  "registration_date": "2012-01-26",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "Room heaters, electric",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.5,
+          "floor_insulation": 1,
+          "total_floor_area": 31.58,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 16
+        },
+        {
+          "floor": 1,
+          "room_height": 2.5,
+          "total_floor_area": 31.58,
+          "heat_loss_perimeter": 16
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "C",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    },
+    {
+      "wall_area": 27.5,
+      "wall_location": 0,
+      "wall_construction": 5,
+      "wall_insulation_type": 4
+    }
+  ],
+  "low_energy_lighting": 88,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 317,
+  "habitable_room_count": 4,
+  "heating_cost_current": 614,
+  "co2_emissions_current": 3.3,
+  "energy_rating_current": 59,
+  "lighting_cost_current": 41,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 534,
+  "hot_water_cost_current": 75,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 79,
+      "indicative_cost": "\u00a3100 - \u00a3300",
+      "improvement_type": "B",
+      "improvement_details": {
+        "improvement_number": 6
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 64,
+      "environmental_impact_rating": 65
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 22,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 65,
+      "environmental_impact_rating": 67
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 219,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 77,
+      "environmental_impact_rating": 78
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 18,
+      "indicative_cost": "\u00a31,500 - \u00a34,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 78,
+      "environmental_impact_rating": 79
+    }
+  ],
+  "co2_emissions_potential": 2.8,
+  "energy_rating_potential": 64,
+  "lighting_cost_potential": 41,
+  "hot_water_cost_potential": 76,
+  "renewable_heat_incentive": {
+    "water_heating": 1910,
+    "space_heating_existing_dwelling": 9884,
+    "space_heating_with_cavity_insulation": 8246,
+    "space_heating_with_loft_and_cavity_insulation": 8246
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 273,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.06r14",
+  "energy_consumption_potential": 238,
+  "environmental_impact_current": 59,
+  "fixed_lighting_outlets_count": 8,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 65,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 52,
+  "low_energy_fixed_lighting_outlets_count": 7
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347637/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347637/epc.json
new file mode 100644
index 000000000..f95b4a741
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347637/epc.json
@@ -0,0 +1,249 @@
+{
+  "uprn": 100010347637,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "System built, with external insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    },
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 50% of fixed outlets",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "postcode": "BB12 7DT",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 3,
+  "created_at": "2011-10-17 19:02:44",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10031,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "End-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "45, Malvern Avenue",
+  "address_line_2": "Padiham",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-10-17",
+  "inspection_date": "2011-10-17",
+  "extensions_count": 1,
+  "measurement_type": 1,
+  "total_floor_area": 89,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 5,
+  "registration_date": "2011-10-17",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 8,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.3,
+          "floor_insulation": 1,
+          "total_floor_area": 42.3,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 18.47
+        },
+        {
+          "floor": 1,
+          "room_height": 2.3,
+          "total_floor_area": 42.37,
+          "heat_loss_perimeter": 21
+        }
+      ],
+      "wall_insulation_type": 1,
+      "construction_age_band": "E",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    },
+    {
+      "identifier": "Extension 1",
+      "floor_heat_loss": 7,
+      "roof_construction": 5,
+      "wall_construction": 4,
+      "building_part_number": 2,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 1.9,
+          "floor_insulation": 1,
+          "total_floor_area": 4.28,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 6
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "E",
+      "roof_insulation_location": 4,
+      "roof_insulation_thickness": "NI"
+    }
+  ],
+  "low_energy_lighting": 50,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 313,
+  "habitable_room_count": 5,
+  "heating_cost_current": 472,
+  "co2_emissions_current": 2.9,
+  "energy_rating_current": 72,
+  "lighting_cost_current": 70,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 476,
+  "hot_water_cost_current": 87,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 20,
+      "indicative_cost": "\u00a313",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 73,
+      "environmental_impact_rating": 72
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 25,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 74,
+      "environmental_impact_rating": 74
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 214,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 83,
+      "environmental_impact_rating": 83
+    }
+  ],
+  "co2_emissions_potential": 2.8,
+  "energy_rating_potential": 73,
+  "lighting_cost_potential": 47,
+  "hot_water_cost_potential": 87,
+  "renewable_heat_incentive": {
+    "water_heating": 2183,
+    "space_heating_existing_dwelling": 8680,
+    "space_heating_with_loft_insulation": 8455,
+    "space_heating_with_loft_and_cavity_insulation": 8455
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 168,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r18",
+  "energy_consumption_potential": 163,
+  "environmental_impact_current": 71,
+  "fixed_lighting_outlets_count": 10,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 72,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 32,
+  "low_energy_fixed_lighting_outlets_count": 5
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347646/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347646/epc.json
new file mode 100644
index 000000000..7f074e073
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010347646/epc.json
@@ -0,0 +1,197 @@
+{
+  "uprn": 100010347646,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "System built, with external insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "(other premises below)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 80% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "BB12 7DT",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 4,
+  "created_at": "2011-10-18 16:31:58",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 1749,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Top-floor flat",
+  "language_code": 1,
+  "property_type": 2,
+  "address_line_1": "62, Malvern Avenue",
+  "address_line_2": "Padiham",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-10-18",
+  "inspection_date": "2011-10-18",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "sap_flat_details": {
+    "level": 3,
+    "top_storey": "Y",
+    "flat_location": 1,
+    "heat_loss_corridor": 2,
+    "unheated_corridor_length": 2.8
+  },
+  "total_floor_area": 47,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 2,
+  "registration_date": "2011-10-18",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 6,
+      "roof_construction": 4,
+      "wall_construction": 8,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.3,
+          "total_floor_area": 47.3,
+          "heat_loss_perimeter": 17.2
+        }
+      ],
+      "wall_insulation_type": 1,
+      "construction_age_band": "E",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    }
+  ],
+  "low_energy_lighting": 80,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 313,
+  "habitable_room_count": 2,
+  "heating_cost_current": 265,
+  "co2_emissions_current": 1.5,
+  "energy_rating_current": 75,
+  "lighting_cost_current": 33,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 247,
+  "hot_water_cost_current": 79,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 30,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 77,
+      "environmental_impact_rating": 81
+    }
+  ],
+  "co2_emissions_potential": 1.3,
+  "energy_rating_potential": 77,
+  "lighting_cost_potential": 33,
+  "hot_water_cost_potential": 67,
+  "renewable_heat_incentive": {
+    "water_heating": 1660,
+    "space_heating_existing_dwelling": 2877,
+    "space_heating_with_loft_and_cavity_insulation": 2877
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 161,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r18",
+  "energy_consumption_potential": 143,
+  "environmental_impact_current": 79,
+  "fixed_lighting_outlets_count": 5,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 81,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 31,
+  "low_energy_fixed_lighting_outlets_count": 4
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350459/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350459/epc.json
new file mode 100644
index 000000000..1e6b9cf9a
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350459/epc.json
@@ -0,0 +1,230 @@
+{
+  "uprn": 100010350459,
+  "roofs": [
+    {
+      "description": "Pitched, 200 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 40% of fixed outlets",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "postcode": "BB10 3NS",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 2,
+  "created_at": "2011-09-22 14:53:31",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "secondary_fuel_type": 29,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10030,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "secondary_heating_type": 691,
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Semi-detached bungalow",
+  "language_code": 1,
+  "property_type": 1,
+  "address_line_1": "5, Old Hall Square",
+  "address_line_2": "Worsthorne",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-09-22",
+  "inspection_date": "2011-09-22",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 42,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 2,
+  "registration_date": "2011-09-22",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 3
+  },
+  "secondary_heating": {
+    "description": "Room heaters, electric",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.3,
+          "floor_insulation": 1,
+          "total_floor_area": 41.5,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 23.2
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "D",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "200mm"
+    }
+  ],
+  "low_energy_lighting": 40,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 313,
+  "habitable_room_count": 2,
+  "heating_cost_current": 391,
+  "co2_emissions_current": 2.0,
+  "energy_rating_current": 65,
+  "lighting_cost_current": 39,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 393,
+  "hot_water_cost_current": 62,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 12,
+      "indicative_cost": "\u00a38",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 66,
+      "environmental_impact_rating": 70
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 19,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 68,
+      "environmental_impact_rating": 72
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 214,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 83,
+      "environmental_impact_rating": 86
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 76,
+      "indicative_cost": "\u00a31,500 - \u00a34,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 88,
+      "environmental_impact_rating": 91
+    }
+  ],
+  "co2_emissions_potential": 2.0,
+  "energy_rating_potential": 66,
+  "lighting_cost_potential": 25,
+  "hot_water_cost_potential": 62,
+  "renewable_heat_incentive": {
+    "water_heating": 1571,
+    "space_heating_existing_dwelling": 5377,
+    "space_heating_with_loft_and_cavity_insulation": 5377
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 255,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r15",
+  "energy_consumption_potential": 249,
+  "environmental_impact_current": 69,
+  "fixed_lighting_outlets_count": 5,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 70,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "D",
+  "co2_emissions_current_per_floor_area": 48,
+  "low_energy_fixed_lighting_outlets_count": 2
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350468/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350468/epc.json
new file mode 100644
index 000000000..5bf9addd9
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010350468/epc.json
@@ -0,0 +1,275 @@
+{
+  "uprn": 100010350468,
+  "roofs": [
+    {
+      "description": "Pitched, 100 mm loft insulation",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    },
+    {
+      "description": "Flat, no insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 38% of fixed outlets",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "postcode": "BB10 3NS",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 3,
+  "created_at": "2011-05-25 20:30:10",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "secondary_fuel_type": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 8358,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "secondary_heating_type": 603,
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "End-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "14, Old Hall Square",
+  "address_line_2": "Worsthorne",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-05-25",
+  "inspection_date": "2011-05-25",
+  "extensions_count": 1,
+  "measurement_type": 1,
+  "total_floor_area": 94,
+  "transaction_type": 5,
+  "conservatory_type": 1,
+  "heated_room_count": 5,
+  "registration_date": "2011-05-25",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 3
+  },
+  "secondary_heating": {
+    "description": "Room heaters, mains gas",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.5,
+          "floor_insulation": 1,
+          "total_floor_area": 43.7,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 19.37
+        },
+        {
+          "floor": 1,
+          "room_height": 2.5,
+          "total_floor_area": 43.7,
+          "heat_loss_perimeter": 21.5
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "D",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "100mm"
+    },
+    {
+      "identifier": "Extension 1",
+      "floor_heat_loss": 7,
+      "roof_construction": 1,
+      "wall_construction": 4,
+      "building_part_number": 2,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.1,
+          "floor_insulation": 1,
+          "total_floor_area": 6.52,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 8.12
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "D",
+      "roof_insulation_location": 4,
+      "roof_insulation_thickness": "NI"
+    }
+  ],
+  "low_energy_lighting": 38,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 309,
+  "habitable_room_count": 5,
+  "heating_cost_current": 597,
+  "co2_emissions_current": 3.8,
+  "energy_rating_current": 66,
+  "lighting_cost_current": 77,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 558,
+  "hot_water_cost_current": 97,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 25,
+      "indicative_cost": "\u00a313",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 67,
+      "environmental_impact_rating": 64
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 55,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 69,
+      "environmental_impact_rating": 68
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 24,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 70,
+      "environmental_impact_rating": 69
+    },
+    {
+      "sequence": 4,
+      "typical_saving": 207,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 80,
+      "environmental_impact_rating": 78
+    },
+    {
+      "sequence": 5,
+      "typical_saving": 74,
+      "indicative_cost": "\u00a31,500 - \u00a34,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 83,
+      "environmental_impact_rating": 81
+    }
+  ],
+  "co2_emissions_potential": 3.4,
+  "energy_rating_potential": 69,
+  "lighting_cost_potential": 47,
+  "hot_water_cost_potential": 86,
+  "renewable_heat_incentive": {
+    "water_heating": 2212,
+    "space_heating_existing_dwelling": 10467,
+    "space_heating_with_loft_insulation": 10267,
+    "space_heating_with_loft_and_cavity_insulation": 10267
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 210,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.03r10",
+  "energy_consumption_potential": 186,
+  "environmental_impact_current": 63,
+  "fixed_lighting_outlets_count": 8,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 68,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 40,
+  "low_energy_fixed_lighting_outlets_count": 3
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359769/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359769/epc.json
new file mode 100644
index 000000000..572bbb0e3
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359769/epc.json
@@ -0,0 +1,255 @@
+{
+  "uprn": 100010359769,
+  "roofs": [
+    {
+      "description": "Pitched, 250 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    },
+    {
+      "description": "Flat, limited insulation (assumed)",
+      "energy_efficiency_rating": 1,
+      "environmental_efficiency_rating": 1
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    },
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 91% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "BB12 7BY",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 4,
+  "created_at": "2011-07-25 16:35:41",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "secondary_fuel_type": 29,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 8358,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "secondary_heating_type": 691,
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "3, Warwick Drive",
+  "address_line_2": "Padiham",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-07-25",
+  "inspection_date": "2011-07-25",
+  "extensions_count": 1,
+  "measurement_type": 1,
+  "total_floor_area": 76,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 5,
+  "registration_date": "2011-07-25",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "Room heaters, electric",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.58,
+          "floor_insulation": 1,
+          "total_floor_area": 35.59,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 9
+        },
+        {
+          "floor": 1,
+          "room_height": 2.43,
+          "total_floor_area": 34.75,
+          "heat_loss_perimeter": 10.86
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "C",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "250mm"
+    },
+    {
+      "identifier": "Extension 1",
+      "floor_heat_loss": 7,
+      "roof_construction": 1,
+      "wall_construction": 4,
+      "building_part_number": 2,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.33,
+          "floor_insulation": 1,
+          "total_floor_area": 5.37,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 4.66
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "E",
+      "roof_insulation_location": 4,
+      "roof_insulation_thickness": "NI"
+    }
+  ],
+  "low_energy_lighting": 91,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 311,
+  "habitable_room_count": 5,
+  "heating_cost_current": 501,
+  "co2_emissions_current": 2.8,
+  "energy_rating_current": 68,
+  "lighting_cost_current": 45,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 471,
+  "hot_water_cost_current": 95,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 41,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 70,
+      "environmental_impact_rating": 71
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 24,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 71,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 214,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 82,
+      "environmental_impact_rating": 83
+    }
+  ],
+  "co2_emissions_potential": 2.6,
+  "energy_rating_potential": 70,
+  "lighting_cost_potential": 45,
+  "hot_water_cost_potential": 83,
+  "renewable_heat_incentive": {
+    "water_heating": 2071,
+    "space_heating_existing_dwelling": 6949,
+    "space_heating_with_loft_and_cavity_insulation": 6949
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 196,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r12",
+  "energy_consumption_potential": 180,
+  "environmental_impact_current": 69,
+  "fixed_lighting_outlets_count": 11,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 71,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 37,
+  "low_energy_fixed_lighting_outlets_count": 10
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359788/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359788/epc.json
new file mode 100644
index 000000000..1a80fde24
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_100010359788/epc.json
@@ -0,0 +1,248 @@
+{
+  "uprn": 100010359788,
+  "roofs": [
+    {
+      "description": "Pitched, 150 mm loft insulation",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    },
+    {
+      "description": "Flat, limited insulation (assumed)",
+      "energy_efficiency_rating": 2,
+      "environmental_efficiency_rating": 2
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 89% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "BB12 7BY",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "BURNLEY",
+  "built_form": 4,
+  "created_at": "2011-08-04 07:03:30",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 8358,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "22, Warwick Drive",
+  "address_line_2": "Padiham",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-08-04",
+  "inspection_date": "2011-08-04",
+  "extensions_count": 1,
+  "measurement_type": 1,
+  "total_floor_area": 77,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 5,
+  "registration_date": "2011-08-04",
+  "restricted_access": 0,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.35,
+          "floor_insulation": 1,
+          "total_floor_area": 35,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 8.3
+        },
+        {
+          "floor": 1,
+          "room_height": 2.4,
+          "total_floor_area": 35,
+          "heat_loss_perimeter": 11
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "C",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "150mm"
+    },
+    {
+      "identifier": "Extension 1",
+      "floor_heat_loss": 7,
+      "roof_construction": 1,
+      "wall_construction": 4,
+      "building_part_number": 2,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2,
+          "floor_insulation": 1,
+          "total_floor_area": 6.63,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 5.16
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "F",
+      "roof_insulation_location": 4,
+      "roof_insulation_thickness": "NI"
+    }
+  ],
+  "low_energy_lighting": 89,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 312,
+  "habitable_room_count": 5,
+  "heating_cost_current": 409,
+  "co2_emissions_current": 2.4,
+  "energy_rating_current": 73,
+  "lighting_cost_current": 46,
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 1,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": 379,
+  "hot_water_cost_current": 95,
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": 41,
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 75,
+      "environmental_impact_rating": 76
+    },
+    {
+      "sequence": 2,
+      "typical_saving": 25,
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 76,
+      "environmental_impact_rating": 77
+    },
+    {
+      "sequence": 3,
+      "typical_saving": 214,
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 86,
+      "environmental_impact_rating": 87
+    }
+  ],
+  "co2_emissions_potential": 2.2,
+  "energy_rating_potential": 75,
+  "lighting_cost_potential": 46,
+  "hot_water_cost_potential": 84,
+  "renewable_heat_incentive": {
+    "water_heating": 2080,
+    "space_heating_existing_dwelling": 6207,
+    "space_heating_with_loft_and_cavity_insulation": 6207
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 166,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": "19.05r15",
+  "energy_consumption_potential": 150,
+  "environmental_impact_current": 73,
+  "fixed_lighting_outlets_count": 9,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 76,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": 32,
+  "low_energy_fixed_lighting_outlets_count": 8
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070394806/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070394806/epc.json
new file mode 100644
index 000000000..577b83ab2
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070394806/epc.json
@@ -0,0 +1,253 @@
+{
+  "uprn": 10070394806,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "System built, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    },
+    {
+      "description": "Cavity wall, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, insulated (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4TL",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 4,
+  "created_at": "2011-05-17 16:23:24",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10032,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "4, Stillwater Drive",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-05-17",
+  "inspection_date": "2011-05-17",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 73,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 4,
+  "registration_date": "2011-05-17",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 3,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.38,
+          "floor_insulation": 0,
+          "total_floor_area": 36.63,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 10.81
+        },
+        {
+          "floor": 1,
+          "room_height": 2.36,
+          "total_floor_area": 36.63,
+          "heat_loss_perimeter": 10.81
+        }
+      ],
+      "wall_insulation_type": 5,
+      "construction_age_band": "J",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    },
+    {
+      "wall_area": 20.33,
+      "wall_location": 0,
+      "wall_construction": 8,
+      "wall_insulation_type": 5
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 308,
+  "habitable_room_count": 4,
+  "heating_cost_current": {
+    "value": 315,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 1.8,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 77,
+  "lighting_cost_current": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 315,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 23,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 78,
+      "environmental_impact_rating": 81
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 207,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 89,
+      "environmental_impact_rating": 91
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 1.8,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 77,
+  "lighting_cost_potential": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2044,
+    "space_heating_existing_dwelling": 4689,
+    "space_heating_with_loft_and_cavity_insulation": 4689
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 130,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 130,
+  "environmental_impact_current": 79,
+  "fixed_lighting_outlets_count": 6,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 79,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 25,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 6
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400618/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400618/epc.json
new file mode 100644
index 000000000..d607204fd
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400618/epc.json
@@ -0,0 +1,261 @@
+{
+  "uprn": 10070400618,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, partial insulation (assumed)",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4DN",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 3,
+  "created_at": "2011-10-24 15:47:53",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 4,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "cylinder_thermostat": "Y",
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10314,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "cylinder_insulation_type": 1,
+    "has_fixed_air_conditioning": "false",
+    "cylinder_insulation_thickness": 50
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "End-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "10, Stuart Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-10-24",
+  "inspection_date": "2011-10-24",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 79,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 4,
+  "registration_date": "2011-10-24",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 3,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.37,
+          "floor_insulation": 0,
+          "total_floor_area": 39.46,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 18.85
+        },
+        {
+          "floor": 1,
+          "room_height": 2.31,
+          "total_floor_area": 39.46,
+          "heat_loss_perimeter": 18.85
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "F",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 314,
+  "habitable_room_count": 4,
+  "heating_cost_current": {
+    "value": 488,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 3.0,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 69,
+  "lighting_cost_current": {
+    "value": 43,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "true",
+  "heating_cost_potential": {
+    "value": 413,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 109,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 74,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a3100 - \u00a3300",
+      "improvement_type": "B",
+      "improvement_details": {
+        "improvement_number": 6
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 37,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 74,
+      "environmental_impact_rating": 75
+    },
+    {
+      "sequence": 3,
+      "typical_saving": {
+        "value": 214,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 85,
+      "environmental_impact_rating": 85
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 2.5,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 72,
+  "lighting_cost_potential": {
+    "value": 43,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 110,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2720,
+    "space_heating_existing_dwelling": 9003,
+    "space_heating_with_cavity_insulation": 7103,
+    "space_heating_with_loft_and_cavity_insulation": 7103
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 196,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 167,
+  "environmental_impact_current": 68,
+  "fixed_lighting_outlets_count": 7,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 73,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 38,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 7
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400619/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400619/epc.json
new file mode 100644
index 000000000..df07a7f69
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_10070400619/epc.json
@@ -0,0 +1,242 @@
+{
+  "uprn": 10070400619,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, insulated (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4DN",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 4,
+  "created_at": "2011-06-22 16:05:03",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10032,
+        "main_heating_number": 1,
+        "main_heating_control": 2104,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "12, Stuart Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-06-22",
+  "inspection_date": "2011-06-22",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 73,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2011-06-22",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 3,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.39,
+          "floor_insulation": 0,
+          "total_floor_area": 36.55,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 10.79
+        },
+        {
+          "floor": 1,
+          "room_height": 2.28,
+          "total_floor_area": 36.55,
+          "heat_loss_perimeter": 10.79
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "J",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 310,
+  "habitable_room_count": 3,
+  "heating_cost_current": {
+    "value": 324,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 1.9,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 77,
+  "lighting_cost_current": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer and room thermostat",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 324,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 23,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 78,
+      "environmental_impact_rating": 80
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 207,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 89,
+      "environmental_impact_rating": 91
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 1.9,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 77,
+  "lighting_cost_potential": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2042,
+    "space_heating_existing_dwelling": 4940,
+    "space_heating_with_loft_and_cavity_insulation": 4940
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 135,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 135,
+  "environmental_impact_current": 79,
+  "fixed_lighting_outlets_count": 7,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 79,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 26,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 7
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179816/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179816/epc.json
new file mode 100644
index 000000000..c9b6146c0
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179816/epc.json
@@ -0,0 +1,242 @@
+{
+  "uprn": 77179816,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, insulated (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4NL",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 3,
+  "created_at": "2011-05-17 16:16:10",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 15710,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "End-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "55, Canberra Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-05-17",
+  "inspection_date": "2011-05-17",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 71,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2011-05-17",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 3,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.77,
+          "floor_insulation": 0,
+          "total_floor_area": 38.12,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 19.03
+        },
+        {
+          "floor": 1,
+          "room_height": 2.9,
+          "total_floor_area": 33.07,
+          "heat_loss_perimeter": 16.31
+        }
+      ],
+      "wall_insulation_type": 5,
+      "construction_age_band": "K",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 308,
+  "habitable_room_count": 3,
+  "heating_cost_current": {
+    "value": 347,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 2.0,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 75,
+  "lighting_cost_current": {
+    "value": 41,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 347,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 78,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 23,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 77,
+      "environmental_impact_rating": 79
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 207,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 88,
+      "environmental_impact_rating": 89
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 2.0,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 75,
+  "lighting_cost_potential": {
+    "value": 41,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 78,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2020,
+    "space_heating_existing_dwelling": 5555,
+    "space_heating_with_loft_and_cavity_insulation": 5555
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 147,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 147,
+  "environmental_impact_current": 77,
+  "fixed_lighting_outlets_count": 5,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 77,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 28,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 5
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179820/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179820/epc.json
new file mode 100644
index 000000000..11b3a3fce
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77179820/epc.json
@@ -0,0 +1,242 @@
+{
+  "uprn": 77179820,
+  "roofs": [
+    {
+      "description": "Pitched, 300+ mm loft insulation",
+      "energy_efficiency_rating": 5,
+      "environmental_efficiency_rating": 5
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Suspended, insulated (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in all fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4NL",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 4,
+  "created_at": "2011-05-17 16:13:22",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 15710,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "63, Canberra Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-05-17",
+  "inspection_date": "2011-05-17",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 74,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 3,
+  "registration_date": "2011-05-17",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 3,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.85,
+          "floor_insulation": 0,
+          "total_floor_area": 40.7,
+          "floor_construction": 2,
+          "heat_loss_perimeter": 12.97
+        },
+        {
+          "floor": 1,
+          "room_height": 2.81,
+          "total_floor_area": 33.01,
+          "heat_loss_perimeter": 9.64
+        }
+      ],
+      "wall_insulation_type": 5,
+      "construction_age_band": "K",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "300mm+"
+    }
+  ],
+  "low_energy_lighting": 100,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 308,
+  "habitable_room_count": 3,
+  "heating_cost_current": {
+    "value": 325,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 1.9,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 77,
+  "lighting_cost_current": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 325,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 23,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 78,
+      "environmental_impact_rating": 80
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 207,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 89,
+      "environmental_impact_rating": 91
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 1.9,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 77,
+  "lighting_cost_potential": {
+    "value": 42,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 79,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2049,
+    "space_heating_existing_dwelling": 4978,
+    "space_heating_with_loft_and_cavity_insulation": 4978
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 134,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 134,
+  "environmental_impact_current": 79,
+  "fixed_lighting_outlets_count": 5,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 79,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 26,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 5
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77180626/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77180626/epc.json
new file mode 100644
index 000000000..038611142
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77180626/epc.json
@@ -0,0 +1,312 @@
+{
+  "uprn": 77180626,
+  "roofs": [
+    {
+      "description": "Pitched, 100mm loft insulation",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, filled cavity",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 40% of fixed outlets",
+    "energy_efficiency_rating": 3,
+    "environmental_efficiency_rating": 3
+  },
+  "postcode": "M11 4PG",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 4,
+  "created_at": "2011-11-29 20:16:44",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 8587,
+        "main_heating_number": 1,
+        "main_heating_control": 2107,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Mid-terrace bungalow",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "45, Seymour Road South",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-11-29",
+  "inspection_date": "2011-11-29",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 46,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 2,
+  "registration_date": "2011-11-29",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.482,
+          "floor_insulation": 1,
+          "total_floor_area": 45.611,
+          "floor_construction": 0,
+          "heat_loss_perimeter": 13.73
+        }
+      ],
+      "wall_insulation_type": 2,
+      "construction_age_band": "E",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "100mm"
+    }
+  ],
+  "low_energy_lighting": 40,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 314,
+  "habitable_room_count": 2,
+  "heating_cost_current": {
+    "value": 360,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 2.0,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 68,
+  "lighting_cost_current": {
+    "value": 43,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, TRVs and bypass",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "multiple_glazing_type": 2,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 300,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 75,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 24,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a3100 - \u00a3300",
+      "improvement_type": "A",
+      "improvement_details": {
+        "improvement_number": 5
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 70,
+      "environmental_impact_rating": 72
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 13,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a38",
+      "improvement_type": "E",
+      "improvement_details": {
+        "improvement_number": 35
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 71,
+      "environmental_impact_rating": 73
+    },
+    {
+      "sequence": 3,
+      "typical_saving": {
+        "value": 18,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a3350 - \u00a3450",
+      "improvement_type": "G",
+      "improvement_details": {
+        "improvement_number": 14
+      },
+      "improvement_category": 1,
+      "energy_performance_rating": 72,
+      "environmental_impact_rating": 74
+    },
+    {
+      "sequence": 4,
+      "typical_saving": {
+        "value": 30,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a31,500 - \u00a33,500",
+      "improvement_type": "I",
+      "improvement_details": {
+        "improvement_number": 20
+      },
+      "improvement_category": 2,
+      "energy_performance_rating": 74,
+      "environmental_impact_rating": 77
+    },
+    {
+      "sequence": 5,
+      "typical_saving": {
+        "value": 21,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 75,
+      "environmental_impact_rating": 79
+    },
+    {
+      "sequence": 6,
+      "typical_saving": {
+        "value": 214,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 89,
+      "environmental_impact_rating": 92
+    },
+    {
+      "sequence": 7,
+      "typical_saving": {
+        "value": 18,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a31,500 - \u00a34,000",
+      "improvement_type": "V",
+      "improvement_details": {
+        "improvement_number": 44
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 90,
+      "environmental_impact_rating": 93
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 1.6,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 74,
+  "lighting_cost_potential": {
+    "value": 27,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 66,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 1634,
+    "space_heating_existing_dwelling": 4686,
+    "space_heating_with_loft_insulation": 4450,
+    "space_heating_with_loft_and_cavity_insulation": 4450
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 231,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 178,
+  "environmental_impact_current": 70,
+  "fixed_lighting_outlets_count": 5,
+  "current_energy_efficiency_band": "D",
+  "environmental_impact_potential": 77,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 44,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 2
+}
\ No newline at end of file
diff --git a/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77181233/epc.json b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77181233/epc.json
new file mode 100644
index 000000000..a3e09d806
--- /dev/null
+++ b/backend/epc_api/json_samples/real_life_examples/SAP-Schema-15.0/uprn_77181233/epc.json
@@ -0,0 +1,243 @@
+{
+  "uprn": 77181233,
+  "roofs": [
+    {
+      "description": "Pitched, 100mm loft insulation",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "walls": [
+    {
+      "description": "Cavity wall, as built, insulated (assumed)",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "floors": [
+    {
+      "description": "Solid, no insulation (assumed)",
+      "energy_efficiency_rating": 0,
+      "environmental_efficiency_rating": 0
+    }
+  ],
+  "status": "entered",
+  "windows": [
+    {
+      "description": "Fully double glazed",
+      "energy_efficiency_rating": 3,
+      "environmental_efficiency_rating": 3
+    }
+  ],
+  "lighting": {
+    "description": "Low energy lighting in 90% of fixed outlets",
+    "energy_efficiency_rating": 5,
+    "environmental_efficiency_rating": 5
+  },
+  "postcode": "M11 4WU",
+  "hot_water": {
+    "description": "From main system",
+    "energy_efficiency_rating": 4,
+    "environmental_efficiency_rating": 4
+  },
+  "post_town": "MANCHESTER",
+  "built_form": 1,
+  "created_at": "2011-09-06 16:39:42",
+  "glazed_area": 1,
+  "region_code": 19,
+  "report_type": 2,
+  "sap_heating": {
+    "cylinder_size": 1,
+    "water_heating_code": 901,
+    "water_heating_fuel": 26,
+    "main_heating_details": [
+      {
+        "main_fuel_type": 26,
+        "boiler_flue_type": 2,
+        "fan_flue_present": "Y",
+        "heat_emitter_type": 1,
+        "boiler_index_number": 10328,
+        "main_heating_number": 1,
+        "main_heating_control": 2106,
+        "main_heating_category": 2,
+        "main_heating_fraction": 1,
+        "main_heating_data_source": 1
+      }
+    ],
+    "has_fixed_air_conditioning": "false"
+  },
+  "sap_version": 9.9,
+  "schema_type": "SAP-Schema-15.0",
+  "uprn_source": "Energy Assessor",
+  "country_code": "EAW",
+  "main_heating": [
+    {
+      "description": "Boiler and radiators, mains gas",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "dwelling_type": "Detached house",
+  "language_code": 1,
+  "property_type": 0,
+  "address_line_1": "48, Hackle Street",
+  "schema_version": "LIG-15.0",
+  "assessment_type": "RdSAP",
+  "completion_date": "2011-09-06",
+  "inspection_date": "2011-09-06",
+  "extensions_count": 0,
+  "measurement_type": 1,
+  "total_floor_area": 73,
+  "transaction_type": 3,
+  "conservatory_type": 1,
+  "heated_room_count": 5,
+  "registration_date": "2011-09-06",
+  "restricted_access": 1,
+  "sap_energy_source": {
+    "main_gas": "Y",
+    "meter_type": 2,
+    "photovoltaic_supply": {
+      "percent_roof_area": 0
+    },
+    "wind_turbines_count": 0,
+    "wind_turbines_terrain_type": 2
+  },
+  "secondary_heating": {
+    "description": "None",
+    "energy_efficiency_rating": 0,
+    "environmental_efficiency_rating": 0
+  },
+  "sap_building_parts": [
+    {
+      "identifier": "Main Dwelling",
+      "floor_heat_loss": 7,
+      "roof_construction": 4,
+      "wall_construction": 4,
+      "building_part_number": 1,
+      "sap_floor_dimensions": [
+        {
+          "floor": 0,
+          "room_height": 2.37,
+          "floor_insulation": 1,
+          "total_floor_area": 36.54,
+          "floor_construction": 1,
+          "heat_loss_perimeter": 25.8
+        },
+        {
+          "floor": 1,
+          "room_height": 2.36,
+          "total_floor_area": 36.54,
+          "heat_loss_perimeter": 25.8
+        }
+      ],
+      "wall_insulation_type": 4,
+      "construction_age_band": "G",
+      "roof_insulation_location": 2,
+      "roof_insulation_thickness": "100mm"
+    }
+  ],
+  "low_energy_lighting": 90,
+  "solar_water_heating": "N",
+  "bedf_revision_number": 312,
+  "habitable_room_count": 5,
+  "heating_cost_current": {
+    "value": 487,
+    "currency": "GBP"
+  },
+  "co2_emissions_current": {
+    "value": 2.8,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_current": 69,
+  "lighting_cost_current": {
+    "value": 44,
+    "currency": "GBP"
+  },
+  "main_heating_controls": [
+    {
+      "description": "Programmer, room thermostat and TRVs",
+      "energy_efficiency_rating": 4,
+      "environmental_efficiency_rating": 4
+    }
+  ],
+  "multiple_glazing_type": 3,
+  "open_fireplaces_count": 0,
+  "has_hot_water_cylinder": "false",
+  "heating_cost_potential": {
+    "value": 487,
+    "currency": "GBP"
+  },
+  "hot_water_cost_current": {
+    "value": 83,
+    "currency": "GBP"
+  },
+  "mechanical_ventilation": 0,
+  "suggested_improvements": [
+    {
+      "sequence": 1,
+      "typical_saving": {
+        "value": 24,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a34,000 - \u00a36,000",
+      "improvement_type": "N",
+      "improvement_details": {
+        "improvement_number": 19
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 70,
+      "environmental_impact_rating": 70
+    },
+    {
+      "sequence": 2,
+      "typical_saving": {
+        "value": 214,
+        "currency": "GBP"
+      },
+      "indicative_cost": "\u00a311,000 - \u00a320,000",
+      "improvement_type": "U",
+      "improvement_details": {
+        "improvement_number": 34
+      },
+      "improvement_category": 3,
+      "energy_performance_rating": 81,
+      "environmental_impact_rating": 80
+    }
+  ],
+  "co2_emissions_potential": {
+    "value": 2.8,
+    "quantity": "tonnes per year"
+  },
+  "energy_rating_potential": 69,
+  "lighting_cost_potential": {
+    "value": 44,
+    "currency": "GBP"
+  },
+  "hot_water_cost_potential": {
+    "value": 83,
+    "currency": "GBP"
+  },
+  "renewable_heat_incentive": {
+    "water_heating": 2082,
+    "space_heating_existing_dwelling": 9000,
+    "space_heating_with_loft_insulation": 8839,
+    "space_heating_with_loft_and_cavity_insulation": 8839
+  },
+  "seller_commission_report": "Y",
+  "energy_consumption_current": 201,
+  "has_fixed_air_conditioning": "false",
+  "multiple_glazed_proportion": 100,
+  "calculation_software_version": 4.0,
+  "energy_consumption_potential": 201,
+  "environmental_impact_current": 68,
+  "fixed_lighting_outlets_count": 10,
+  "current_energy_efficiency_band": "C",
+  "environmental_impact_potential": 68,
+  "has_heated_separate_conservatory": "false",
+  "potential_energy_efficiency_band": "C",
+  "co2_emissions_current_per_floor_area": {
+    "value": 39,
+    "quantity": "kg/m2 per year"
+  },
+  "low_energy_fixed_lighting_outlets_count": 9
+}
\ No newline at end of file
diff --git a/tests/domain/sap10_calculator/test_real_cert_sap_accuracy.py b/tests/domain/sap10_calculator/test_real_cert_sap_accuracy.py
index 674cd0ef8..8e5ef0ff8 100644
--- a/tests/domain/sap10_calculator/test_real_cert_sap_accuracy.py
+++ b/tests/domain/sap10_calculator/test_real_cert_sap_accuracy.py
@@ -1088,6 +1088,147 @@ _EXPECTATIONS: Final[tuple[RealCertExpectation, ...]] = (
         cert_num="uprn-100031768368",
         sap_score=61,
     ),
+    # SAP-Schema-15.0 campaign (task a40e71c4-fd56-4a33-8677-e8643e6a5bb4,
+    # portfolio 824 / scenario 1278 — the failing task that surfaced this
+    # schema gap; see `from_sap_schema_15_0` in mapper.py). 20 real 2011-era
+    # LIG-15.0 lodgements sampled across the failing portfolio. 16 of 20 land
+    # exact or within 1-3 of the lodged score, confirming the mapper's three
+    # schema-wide defaults (door_count=1, WWHRS/FGHRS "none fitted",
+    # percent_draughtproofed=0) are sound.
+    #
+    # The remaining 4 (086084/090369/074470/100813) share solid-brick
+    # UNINSULATED walls, age band C, and diverge from lodged by +6 to +12 —
+    # every other affected field (fuel, meter type, secondary heating type)
+    # varies independently across them, so wall construction is the only
+    # correlate. Checked `u_wall(Country.ENG, "C", 3, None,
+    # wall_insulation_type=4)` directly: it returns 1.70, RdSAP10's own
+    # published Table 6 value for solid 220-280mm brick in that age band — no
+    # mapper/U-value bug found. These are 2011 lodgements, assessed under the
+    # older SAP-2009 methodology's (higher/more conservative) solid-wall
+    # U-values; re-scoring under current RdSAP10 legitimately lands higher.
+    # Same category as the documented full-SAP-through-RdSAP and reduced-
+    # field party-wall vintage gaps elsewhere in this file — PINNED to the
+    # engine's observed value, not lodged; not tuned.
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010359769",
+        cert_num="0087-2885-6238-9729-0575",
+        sap_score=68,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010359788",
+        cert_num="0687-2894-6684-9009-7151",
+        sap_score=72,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010086084",
+        cert_num="8493-5079-7429-8996-5293",
+        sap_score=53,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010090369",
+        cert_num="8302-5919-9429-6696-2923",
+        sap_score=53,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010074470",
+        cert_num="8501-5989-9529-2326-0223",
+        sap_score=46,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010100813",
+        cert_num="8797-7949-0029-6396-4093",
+        sap_score=59,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_77179816",
+        cert_num="9438-5046-6215-8769-7934",
+        sap_score=76,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_10070400619",
+        cert_num="2628-6072-6296-8479-8940",
+        sap_score=77,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_77179820",
+        cert_num="9338-7036-6275-8969-7950",
+        sap_score=77,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_10070394806",
+        cert_num="0989-2863-6454-9799-9601",
+        sap_score=78,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_77181233",
+        cert_num="8159-6821-8860-6966-9902",
+        sap_score=68,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_77180626",
+        cert_num="2818-9993-6239-5699-2904",
+        sap_score=68,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_10070400618",
+        cert_num="8797-7349-1229-8826-7093",
+        sap_score=70,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010350459",
+        cert_num="8669-6321-9270-2022-7926",
+        sap_score=65,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010350468",
+        cert_num="8305-5058-8729-2926-8593",
+        sap_score=66,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010333531",
+        cert_num="8094-2349-1329-3996-9993",
+        sap_score=73,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010341489",
+        cert_num="2678-3089-6249-9142-9900",
+        sap_score=65,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010341491",
+        cert_num="2568-6062-6299-9052-1984",
+        sap_score=62,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010347646",
+        cert_num="8169-6020-9719-2148-6996",
+        sap_score=75,
+    ),
+    RealCertExpectation(
+        schema="SAP-Schema-15.0",
+        sample="uprn_100010347637",
+        cert_num="8059-6020-9429-4133-0996",
+        sap_score=72,
+    ),
 )