Energy bills are one of the biggest pressures on UK household budgets right now – and the home you live in has a huge bearing on what you pay.
New build homeowners spend £420 less on energy each year than those in older properties rated EPC D – making them 27% cheaper to run.
The gap widens to £618 a year, or 39%, when compared against the least efficient homes rated EPC F or G.
Nearly all new builds carry an EPC A or B rating, yet fewer than 5% of older properties reach the same standard.
For those in older homes, the quickest wins are loft insulation (saving up to £390 a year) and cavity wall insulation (up to £420) — small steps that can each move your EPC up a band. Source: Dataloft by PriceHubble, HBF Watt A Save 2026, based on a 90m² property