On average, a new build home could save around £420 a year on energy bills compared with an older EPC D-rated property.
This annual saving equates to around £35 per month on household energy bills.
A new build home is around 20% cheaper to run than the average older home, rising to around 30% compared with older F- or G-rated properties.
of our homes have an EPC rating of at least a B.
The average older property has an EPC rating of D, with 41% of existing homes rated D or below**.
Percentage of properties by EPC rating, year to December 2025
Efficient heating system
Double glazed windows
Water efficient appliances and fittings
High quality insulation
Air pressure testing to lock in heat
Energy efficient appliances
| * | Figures based on HBF 'Watt a Save: The New Build Advantage' research. |
| ** | EPC comparison based on Government Energy Performance Certificate registrations data for new and existing properties in the year to December 2025, as reported by the Home Builders Federation. |
