EPC: the energy certificate for homes in England and Wales
An Energy Performance Certificate rates a home from A (very efficient) to G (very inefficient). A valid EPC is part of the Boiler Upgrade Scheme check.
A
B
C
D
E
F
G
Where to find your EPC
In the official government register, free, by postcode. An EPC lasts ten years. If yours is missing or expired, an accredited assessor issues a new one.
Why the EPC matters for the grant
Ofgem uses the EPC to check that the property fits the planned system and whether insulation recommendations are outstanding. Loft or cavity wall insulation listed on the certificate must be installed, or an exemption must apply.
Source: GOV.UK, Energy Performance Certificates and the Boiler Upgrade Scheme. Checked on 26 October 2026.