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Understanding EPC Ratings

What does the EPC rating in my report mean?

An Energy Performance Certificate (EPC) rates how energy-efficient a home is on a scale from A (most efficient) to G (least efficient). Your Homebuyer Report shows the published certificate for the address when one is on the official register — including the current rating and, where available, the potential rating after suggested improvements.

Assessors use a standard method for existing homes (based on a site visit and recorded features). The certificate is meant to give buyers and tenants a shared, comparable view of running costs and energy use — not a personalised quote from your energy supplier.

What you usually see

  • Energy efficiency rating (A–G, roughly 1–100 points) — based on estimated costs for heating, hot water and lighting.
  • Potential rating — what the home could score if the recommended improvements were carried out.
  • Environmental impact — a view of estimated carbon dioxide emissions from running the home.

Rough guide to the bands

  • A–B (about 81–100) — highly efficient. Often newer homes, strong insulation, heat pumps, or solar panels.
  • C–D (about 55–80) — typical of many modern or upgraded homes with a decent boiler, cavity wall insulation and double glazing.
  • E–G (about 1–54) — less efficient. Common with older solid walls, single glazing, older electric heating or ageing boilers.

If no EPC is found for the address, we link to the official GOV.UK search so you can check for a newer certificate. Need a new one lodged? See How to get a new EPC.

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