Energy Performance Certificate in London

An Energy Performance Certificate (EPC) measures a property’s energy efficiency using a scale from A (most efficient) to G (least efficient). It must be obtained when a property in England or Wales is constructed, sold, or rented—and remains valid for 10 years.

Legal Requirements for London Property

• A valid EPC is mandatory when selling or leasing properties.

• All rental properties must have a minimum Band E rating, as per current regulations.

• The proposed upgrade to Band C by 2030 is currently under discussion, with the government reinstating it earlier this year  While not yet legally enforced, many London homeowners are preparing in advance.

 Benefits of a Better EPC Rating

• Lower energy costs: Improving from Band D to C can save up to £400 annually.

• Higher property values and appeal: Properties with higher EPC grades attract more buyers and better rental rates.

• Future-proofing: Early upgrades minimize future compliance costs and possible penalties.

 How to Improve Your EPC

According to Energy Saving Trust and landlord guidance, common upgrades include:

• Switching to LED lighting

• Installing loft, floor, or cavity wall insulation

• Upgrading to energy-efficient boilers

• Adding double glazing, thermostats, and smart heating controls

• Considering solar panels where suitable

Financial assistance is available via the Great British Insulation Scheme for properties with Band D or below.

 Finding an Assessor

Only an accredited Domestic Energy Assessor (DEA) can issue a valid EPC  In London, numerous certified assessors are ready to perform inspections, which typically take 30–40 minutes and cost from around £89 

• The 2025 Band C rule was dropped, but discussions resumed in early 2025 

• The target to phase in Band C by 2030 may still become legally required—early action is prudent.

• A proposed EPC B rating for commercial properties by 2030 could potentially make ~80% unlettable in London if not implemented.

EPC ratings in London are more important than ever. Although only a Band E is legally needed today, improving to Band C brings real savings, higher value, and better readiness for future rules. Start with insulation, efficient boilers, and lighting—then re-measure with a qualified assessor for full proof of your upgrades.