EPC Retrofit Cost Calculator UK
Estimate what it might cost to upgrade a rental towards EPC band C ahead of the 2030 deadline. Toggle the measures you need, apply any grant funding, and see the cost after grants and a simple payback.
EPC band C deadline: 1 October 2030
All privately rented homes in England & Wales must reach EPC band C by 1 October 2030 for continued letting, unless exempt. Until then the interim Minimum Energy Efficiency Standard remains EPC band E. The maximum fine for breach is £30,000 per property, per breach. The C standard uses a dual metric (a fabric performance metric plus a smart-readiness/heating metric) on new-style EPCs. (GOV.UK, confirmed January 2026)
Illustrative — get quotes. Costs vary widely by property type, age and construction.
Eligibility and amounts change — check current GOV.UK guidance.
Illustrative running-cost saving, used only to estimate a simple payback.
Total measure cost
£2,400
Cost after grants
£2,400
4 measures selected.
Measures selected
4
Simple payback
5.3 yrs
Payback divides the cost after grants by the estimated annual energy saving. Enter a saving to see it. This is a rough guide only, not a guaranteed return.
Not financial advice. For educational purposes only. All cost and saving figures are user-editable illustrative estimates and will vary widely by property and contractor. Get your own quotes and check current grant eligibility and EPC rules on GOV.UK before budgeting or committing to works.
Budget early for EPC C. With the 1 October 2030 deadline approaching, spreading retrofit works across multiple tax years and stacking available grants can soften the cash impact. Treat the figures here as a starting point and firm them up with quotes.