England & Wales · Cost to reach band C
What does it cost to fix a home's energy rating?
Pick a home's type, age and current band to see what homes like it typically spend to reach band C (the warmer, cheaper-to-run standard) — and exactly which measures the money goes on.
Typical cost to fix
£19,200
median across homes like yours, to their full potential rating
Reach band C or better
100%
Improvement, typically
+1.6 bands
Where the cost goes
The measures assessors most often recommend for this cohort, with the certificate's indicative cost for each. Individual costs are typical figures and won't sum exactly to the median total above.
- Solar PV£6,500recommended for 99% of these homes
- Floor insulation£1,000recommended for 90% of these homes
- Solar water heating£5,000recommended for 83% of these homes
- Wall insulation£9,000recommended for 67% of these homes
- Low-energy lighting£35recommended for 49% of these homes
- Heating controls£400recommended for 26% of these homes
- Condensing boiler£2,600recommended for 20% of these homes
- Loft / roof insulation£225recommended for 18% of these homes
Based on 938,865 houses built 1930–1949 currently rated band D, from the full EPC register.
Want the number for your actual home?
These are cohort medians. Check your real EPC instead.
Enter your address and we start from the home's real certificate in the register — its own rating, the recommended improvements, and what it'd cost to make it warmer and cheaper to run — not a typical home like it.
More calculators
- EPC improvement simulatorWhat band a home like yours can reach, and what each measure does.
- Energy savings & paybackAnnual saving at today's prices, payback, and 10-year net.
- Heat pump calculatorSuitability, the £7,500 grant, and the running-cost case.
- Retrofit grant checkerWhich grants you may qualify for, by tenure, band and income.
- MEES exemption checkerFor landlords: whether a below-C rental qualifies for an exemption, and how to register it.
Median figures from the full EPC Open Data register. Modelled, not a quote. Methodology.