Today's EPC gives one A–G rating, mainly based on running costs. The new-format EPC, now expected in the second half of 2027, replaces it with four headline metrics, calculated by a new method called the Home Energy Model.
| Metric | What it measures | Counts for the 2030 standard? |
|---|---|---|
| Fabric Performance | How well walls, roof, floors and windows keep heat in | Yes: everyone needs C |
| Heating System | How efficient and low-carbon the heating is | Yes: C here, or on Smart Readiness |
| Smart Readiness | Solar, batteries, smart meters and controls | Yes: C here, or on Heating System |
| Energy Cost | Estimated bills, in pounds | No: shown, but doesn't count |
The gas boiler problem
The government has proposed that homes heated by fossil fuels shouldn't be able to score above D on the Heating System metric, however efficient the boiler. If that's confirmed, a gas-heated home can't use the heating route to compliance. It would need C on both Fabric Performance and Smart Readiness, even if it's rated C today.
This is still a proposal. The government's response to the consultation, which will set the band boundaries, hasn't been published yet.
What you can do now
- If the home is rated C today, consider getting a fresh EPC before 1 October 2029. It counts as compliant until it expires.
- Prioritise fabric (insulation, glazing, draught-proofing), because every route needs it.
- For gas-heated homes, look at Smart Readiness upgrades (solar, a battery, smart controls) or a heat pump.
Check your property to see how exposed it is.
Sources
- GOV.UK: Reforms to the energy performance of buildings regime
- Government response: improving the energy performance of privately rented homes (Jan 2026)
Guidance only, not legal or financial advice.
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