EPC ratings A to G, in plain English
An EPC sorts every property into one of seven bands. Band A (92+ SAP points) is the most efficient: new-build flats with excellent insulation, heat pumps or district heating, and low running costs. Band B (81 to 91) and C (69 to 80) cover well-built modern homes and good Victorian or Edwardian properties that have had a thorough retrofit. Band D (55 to 68) is the UK median and is where most stock-condition rental properties sit. Band E (39 to 54) is the legal floor for letting; below this it is unlawful to let the property without a registered exemption. Bands F (21 to 38) and G (1 to 20) are the worst-performing properties, typically solid-wall homes with outdated heating and minimal insulation. The single biggest lever to move a property up the bands is heating: a new A-rated combi or heat pump combined with full insulation typically lifts a band E or D home into band C.