diff --git a/domain/epc/property_overlays/main_fuel_overlay.py b/domain/epc/property_overlays/main_fuel_overlay.py
index 9b580860..c3145705 100644
--- a/domain/epc/property_overlays/main_fuel_overlay.py
+++ b/domain/epc/property_overlays/main_fuel_overlay.py
@@ -18,6 +18,7 @@ from domain.modelling.simulation import EpcSimulation, HeatingOverlay
 # RdSAP-20/21 `main_fuel` `(not community)` codes (epc_codes.csv `main_fuel`).
 _FUEL_CODES: dict[str, int] = {
     "mains gas": 26,
+    "mains gas (community)": 20,
     "LPG (bulk)": 27,
     "oil": 28,
     "electricity": 29,