Domestic EPC score ranges
| Band | Score | Broad interpretation |
|---|---|---|
| A | 92 and above | Very high modelled efficiency |
| B | 81–91 | High efficiency |
| C | 69–80 | Above the middle of the scale |
| D | 55–68 | Mid-range efficiency |
| E | 39–54 | Lower efficiency |
| F | 21–38 | Poor efficiency |
| G | 1–20 | Very poor efficiency |
The band is a convenient summary. The number matters too: a home scoring 68 and one scoring 55 are both D-rated but sit at opposite ends of the band.
Current rating and potential rating
The current rating reflects the property as assessed. The potential rating assumes the recommendations on the certificate are completed in the order shown. It is a modelled scenario, not a promise.
Before relying on the potential score, check whether the measures are technically appropriate, whether planning or freeholder consent is needed, and whether the indicative costs are still realistic.
What is a “good” EPC rating?
There is no single answer for every decision. A C-rated flat may still have high service charges; a D-rated period house may be attractive but require a larger improvement budget. For a landlord, the legal minimum and exemption rules also matter.
A useful comparison looks at:
- the exact numerical score, not only the letter;
- heating type and controls;
- wall, roof and floor insulation;
- window description;
- current and potential costs;
- the improvement sequence;
- the certificate date.
Why area averages differ
Newer developments often raise an area's average. Places with older solid-wall housing, off-gas heating or larger detached properties can score differently. An area average describes the certificates available; it does not determine the score of every home in that area.
How common are the bands?
The MHCLG live tables provide the official distribution of domestic EPC lodgements for England and Wales. EPCScore uses that current benchmark alongside a more detailed 2020–2025 area dataset. The register is not a census of all homes, because a certificate is generally triggered by construction, sale or letting.