What Is An Energy Performance Certificate?
To issue a legally valid EPC, a qualified and accredited Energy Assessor must collect information including:
- The type of property (e.g. flat, bungalow, detached or semi-detached house)
- The age of the property
- The property's size and the number of floors/storeys
- The quantity and style of glazing
- The main construction materials used (such as brick or timber frame)
- The level of insulation
- The heating system and fuel source
- Any energy-saving or renewable technologies installed
Since every property is occupied differently, EPC ratings are calculated using standard occupancy assumptions (typically two adults and two children). This means the rating may not accurately reflect the actual energy use of current occupants, whose heating, lighting, and other energy habits may differ.
When Do I Need an EPC?
An Energy Performance Certificate (EPC) is legally required when a property is newly built or is being marketed for sale or rent. You may also need an EPC when applying for certain funding, grants or government schemes.
Minimum Energy Efficiency Standards (MEES)
In England and Wales, rental properties must currently have a minimum EPC rating of E. (This requirement will rise to Band C from 1 October 2030).
How Long Does an EPC Last?
An EPC is valid for 10 years unless a newer certificate is issued for the same property during that period. Existing homeowners and tenants are not required to obtain a new EPC unless they decide to sell, let or transfer an interest in the property. Once an EPC has expired, it is no longer legally valid.