diff --git a/domain/modelling/contingencies.py b/domain/modelling/contingencies.py
index 0483ebe2..4163b9ec 100644
--- a/domain/modelling/contingencies.py
+++ b/domain/modelling/contingencies.py
@@ -24,6 +24,10 @@ _CONTINGENCY_RATES: dict[str, float] = {
     "system_tune_up": 0.10,
     "system_tune_up_zoned": 0.10,
     "solar_pv": 0.15,
+    # Decommissioning a fixed secondary heater + localised making-good is small,
+    # uncertain work: the rate covers the unknown heater count / hard-wired vs
+    # plugged status / repaint extent (ADR-0028).
+    "secondary_heating_removal": 0.25,
 }
 
 
diff --git a/harness/sample_catalogue.json b/harness/sample_catalogue.json
index 02eb24eb..1eb5ad62 100644
--- a/harness/sample_catalogue.json
+++ b/harness/sample_catalogue.json
@@ -16,5 +16,6 @@
   "gas_boiler_upgrade": { "unit_cost_per_m2": 3000.0 },
   "system_tune_up": { "unit_cost_per_m2": 500.0 },
   "system_tune_up_zoned": { "unit_cost_per_m2": 900.0 },
-  "solar_pv": { "unit_cost_per_m2": 0.0 }
+  "solar_pv": { "unit_cost_per_m2": 0.0 },
+  "secondary_heating_removal": { "unit_cost_per_m2": 250.0 }
 }
diff --git a/tests/repositories/product/test_product_json_repository.py b/tests/repositories/product/test_product_json_repository.py
index a991f2a6..30ebfc94 100644
--- a/tests/repositories/product/test_product_json_repository.py
+++ b/tests/repositories/product/test_product_json_repository.py
@@ -50,6 +50,24 @@ def test_get_raises_when_measure_type_absent(tmp_path: Path) -> None:
         ProductJsonRepository(catalogue).get("cavity_wall_insulation")
 
 
+def test_get_joins_the_secondary_heating_removal_contingency(tmp_path: Path) -> None:
+    # Arrange — a flat per-dwelling decommission price for the removal measure
+    # (ADR-0028); the 0.25 contingency is joined from config, not the file.
+    catalogue: Path = _write_catalogue(
+        tmp_path, {"secondary_heating_removal": {"unit_cost_per_m2": 250.0}}
+    )
+
+    # Act
+    product: Product = ProductJsonRepository(catalogue).get(
+        "secondary_heating_removal"
+    )
+
+    # Assert
+    assert product.measure_type == "secondary_heating_removal"
+    assert abs(product.unit_cost_per_m2 - 250.0) <= 1e-9
+    assert abs(product.contingency_rate - 0.25) <= 1e-9
+
+
 def test_get_raises_when_entry_lacks_unit_cost(tmp_path: Path) -> None:
     # Arrange
     catalogue: Path = _write_catalogue(