EPC explained (2026)
What your Energy Performance Certificate means, how to improve it, and how a more efficient home cuts your bills.
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What an EPC tells you
An Energy Performance Certificate rates your home from A (most efficient) to G (least), with an estimate of running costs and tailored improvement recommendations. Most UK homes sit around D; C or above is considered good.
A better rating means you use less energy for the same comfort. Combined with a competitive tariff, it is one of the most effective ways to cut bills - especially with the July cap rise. Compare deals while you plan improvements.
Ways to improve your EPC
Insulation
Loft and cavity wall insulation and draught-proofing are usually the cheapest, highest-impact fixes.
Heating & lighting
An efficient boiler or heat pump and LED lighting lift your rating and cut running costs.
Solar & battery
Generating your own power improves the rating and offsets pricier grid electricity.
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FAQs
A is best, G worst; C or above is good. Many UK homes are at D - a higher rating means lower energy use and bills.
Insulation, draught-proofing, LED lighting, an efficient boiler or heat pump, and solar - your EPC lists tailored recommendations.
Indirectly - an efficient home uses fewer units. With the cap up 13% from July, efficiency plus a competitive tariff saves the most.
Cut bills while you upgrade
Compare a competitive tariff to pair with your efficiency improvements.
No obligation. Reviewed 5 July 2026.
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