Guide · EPC
How to Improve Your EPC Rating
Common measures that raise an EPC rating, the points to check before starting, and how to prove the improvement.
Measures that commonly improve an EPC rating
- Loft and roof insulation
- Cavity wall insulation, or internal or external solid wall insulation
- Floor insulation and draught-proofing
- Heating controls and a more efficient boiler or heat pump
- Double glazing or secondary glazing
- Low-energy lighting
- Solar PV where the property suits it
The right combination depends on the building. Your current EPC lists recommended measures, and a retrofit assessment can look at the property more closely.
Points to check first
- Ventilation and damp – adding insulation without considering ventilation can create moisture problems.
- Listed buildings and conservation areas – some measures may need consent or a different approach.
- Tenancy and consent – landlord and tenant arrangements affect who can approve works.
- Funding – funded support may require specific assessments and registered installers. See ECO and funded retrofit.
Prove the improvement
After works are complete, a new EPC records the updated rating. Our pre and post retrofit EPCs give you before-and-after evidence. If you are a landlord, see MEES support and our EPC and MEES guide.
Plan your EPC improvements
Send the address and current EPC. We will explain the route to a retrofit assessment or a new EPC.
Frequently asked questions
What is the quickest way to improve an EPC rating?
It depends on the property. Low-cost measures such as draught-proofing, lighting and heating controls may help, but larger gains usually need insulation or heating upgrades. The EPC recommendations are a starting point.
Will a new EPC be needed after works?
Yes. A new EPC is needed to record the updated rating after improvements.
Do landlords have to improve a low EPC rating?
Rented homes must normally meet the minimum standard unless an exemption applies. See our MEES support and landlord EPC pages.