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Are Energy Performance Certificates (EPC) important when buying a home?

Sellers have to provide an EPC to potential buyers. They can be a helpful guide to the energy efficiency of a property but should not be taken as gospel.

EPC rating diagram

What is an EPC?

  • It’s a standardised document which ranks properties in terms of energy efficiency, and which homesellers have to provide to potential buyers.
  • EPCs include information about the property’s energy use and costs as well as recommendations about how to make it more efficient and cheaper to run. Properties are ranked from A to G, A being the most energy efficient. As of April 2018 properties ranked F or G will not be allowed to be let to tenants. As such rating will be especially important to landlords looking to buy a property to let.
  • Sellers in Scotland have to provide a more extensive “home report”, which includes an EPC, as well as a survey and a property questionnaire.

Should I let an EPC decide whether or not I buy a property?

  • It’s useful to know how energy efficient a property is before you buy it and an EPC indicates some of the inefficiencies that could become expensive, as well as how much you should expect to pay to fix them.
  • But EPCs should not be taken too seriously – the assessment doesn’t take into account how many people live in the property and assessors don’t have access to energy bills.

How thorough is the energy assessment?

  • Assessors are not allowed to be invasive when carrying out a survey. That means, for example, that he or she can’t drill into the walls or ceilings to establish the condition of insulation or even whether the building is insulated at all.
  • Because of this, assessors often have to either assume the worst or go by whatever the property holder tells them.

Do all properties have one?

  • EPCs are not required for listed buildings. This is because improvements such as installing double glazing are often prohibited because they require structural changes.

Can I keep the EPC the seller gives me and use it if I decide to sell up?

  • Yes, EPCs were introduced in 2007 and they are valid for ten years. So hold on to it.



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