slice 6: flat booleans and optional integer indicators

Adds three non-nullable booleans (solar_water_heating,
has_hot_water_cylinder, has_fixed_air_conditioning) and three
optional integer indicators (percent_draughtproofed,
energy_rating_average, environmental_impact_current). All direct
EpcPropertyData field reads.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/domain/src/domain/ml/tests/_fixtures.py

@@ -35,6 +35,12 @@ def make_minimal_sap10_epc(
     cfl_fixed_lighting_bulbs_count: int = 0,
     led_fixed_lighting_bulbs_count: int = 0,
     incandescent_fixed_lighting_bulbs_count: int = 0,
+    solar_water_heating: bool = False,
+    has_hot_water_cylinder: bool = False,
+    has_fixed_air_conditioning: bool = False,
+    percent_draughtproofed: Optional[int] = None,
+    energy_rating_average: Optional[int] = None,
+    environmental_impact_current: Optional[int] = None,
 ) -> EpcPropertyData:
     """Construct a minimal valid SAP10 EpcPropertyData with parametrisable targets."""
     return EpcPropertyData(
@@ -67,9 +73,9 @@ def make_minimal_sap10_epc(
             electricity_smart_meter_present=False,
         ),
         sap_building_parts=[],
-        solar_water_heating=False,
+        solar_water_heating=solar_water_heating,
-        has_hot_water_cylinder=False,
+        has_hot_water_cylinder=has_hot_water_cylinder,
-        has_fixed_air_conditioning=False,
+        has_fixed_air_conditioning=has_fixed_air_conditioning,
         wet_rooms_count=wet_rooms_count,
         extensions_count=extensions_count,
         heated_rooms_count=heated_rooms_count,
@@ -84,6 +90,9 @@ def make_minimal_sap10_epc(
         energy_rating_current=energy_rating_current,
         co2_emissions_current=co2_emissions_current,
         energy_consumption_current=energy_consumption_current,
+        percent_draughtproofed=percent_draughtproofed,
+        energy_rating_average=energy_rating_average,
+        environmental_impact_current=environmental_impact_current,
         renewable_heat_incentive=RenewableHeatIncentive(
             space_heating_kwh=space_heating_kwh,
             water_heating_kwh=water_heating_kwh,

packages/domain/src/domain/ml/tests/test_transform.py

@@ -180,3 +180,62 @@ def test_to_row_extracts_count_features() -> None:
     assert row["cfl_fixed_lighting_bulbs_count"] == 0
     assert row["led_fixed_lighting_bulbs_count"] == 8
     assert row["incandescent_fixed_lighting_bulbs_count"] == 2
+
+
+_EXPECTED_FLAT_BOOLEAN_FEATURES: tuple[str, ...] = (
+    "solar_water_heating",
+    "has_hot_water_cylinder",
+    "has_fixed_air_conditioning",
+)
+
+
+_EXPECTED_OPTIONAL_INT_FEATURES: tuple[str, ...] = (
+    "percent_draughtproofed",
+    "energy_rating_average",
+    "environmental_impact_current",
+)
+
+
+def test_schema_advertises_boolean_and_optional_int_features() -> None:
+    # Arrange
+    transform = EpcMlTransform()
+
+    # Act
+    schema = transform.schema()
+
+    # Assert
+    for feature_name in _EXPECTED_FLAT_BOOLEAN_FEATURES:
+        assert feature_name in schema.feature_columns, feature_name
+        column = schema.feature_columns[feature_name]
+        assert column.dtype is bool
+        assert column.nullable is False
+    for feature_name in _EXPECTED_OPTIONAL_INT_FEATURES:
+        assert feature_name in schema.feature_columns, feature_name
+        column = schema.feature_columns[feature_name]
+        assert column.dtype is int
+        assert column.nullable is True
+
+
+def test_to_row_extracts_boolean_and_optional_int_features() -> None:
+    # Arrange
+    epc = make_minimal_sap10_epc(
+        energy_rating_current=82,
+        solar_water_heating=True,
+        has_hot_water_cylinder=True,
+        has_fixed_air_conditioning=False,
+        percent_draughtproofed=100,
+        energy_rating_average=60,
+        environmental_impact_current=72,
+    )
+    transform = EpcMlTransform()
+
+    # Act
+    row = transform.to_row(epc)
+
+    # Assert
+    assert row["solar_water_heating"] is True
+    assert row["has_hot_water_cylinder"] is True
+    assert row["has_fixed_air_conditioning"] is False
+    assert row["percent_draughtproofed"] == 100
+    assert row["energy_rating_average"] == 60
+    assert row["environmental_impact_current"] == 72

packages/domain/src/domain/ml/transform.py

@@ -66,6 +66,32 @@ _FEATURE_COLUMNS: dict[str, ColumnSpec] = {
         nullable=False,
         description="Number of incandescent bulbs in fixed lighting outlets.",
     ),
+    # Booleans — directly populated by all SAP10 EPCs
+    "solar_water_heating": ColumnSpec(
+        dtype=bool, nullable=False, description="Solar water heating present."
+    ),
+    "has_hot_water_cylinder": ColumnSpec(
+        dtype=bool, nullable=False, description="Hot water cylinder present."
+    ),
+    "has_fixed_air_conditioning": ColumnSpec(
+        dtype=bool, nullable=False, description="Fixed air conditioning present."
+    ),
+    # Optional integer indicators — may be absent on older or partial certificates
+    "percent_draughtproofed": ColumnSpec(
+        dtype=int,
+        nullable=True,
+        description="Percentage of windows / doors with draught proofing.",
+    ),
+    "energy_rating_average": ColumnSpec(
+        dtype=int,
+        nullable=True,
+        description="Average SAP score for comparable properties (neighbourhood comparator).",
+    ),
+    "environmental_impact_current": ColumnSpec(
+        dtype=int,
+        nullable=True,
+        description="Environmental impact rating; separate from energy efficiency SAP score.",
+    ),
 }
 
 
@@ -154,6 +180,14 @@ class EpcMlTransform:
             "cfl_fixed_lighting_bulbs_count": epc.cfl_fixed_lighting_bulbs_count,
             "led_fixed_lighting_bulbs_count": epc.led_fixed_lighting_bulbs_count,
             "incandescent_fixed_lighting_bulbs_count": epc.incandescent_fixed_lighting_bulbs_count,
+            # Features — booleans
+            "solar_water_heating": epc.solar_water_heating,
+            "has_hot_water_cylinder": epc.has_hot_water_cylinder,
+            "has_fixed_air_conditioning": epc.has_fixed_air_conditioning,
+            # Features — optional integer indicators
+            "percent_draughtproofed": epc.percent_draughtproofed,
+            "energy_rating_average": epc.energy_rating_average,
+            "environmental_impact_current": epc.environmental_impact_current,
             # Targets
             "sap_score": epc.energy_rating_current,
             "co2_emissions": epc.co2_emissions_current,