What is assessed during an EPC?

Selling or renting property? If so, you will no doubt already know that you need an Energy Performance Certificate (EPC). Most home-owners however, have no idea what the DEA (domestic energy assessor) will be looking at and how they can help.

Energy Performance Certificate

To produce the Energy Performance Certificate (EPC) the DEA will initially assess the construction of the property, including measuring the thickness of the walls. If you have any insulation installed to the walls, either in the form of cavity wall insulation, or internal/external insulation for solid walls, then dig out your certificate. It can mean a few extra points on your final result.

Windows – the energy assessor will be checking the glazing type, and checking each of the seals for the effectiveness of the draughtproofing. If your windows were installed post 2002, again find your certficate/guarantee as the DEA needs evidence.

Heating and lighting – the energy assessor will look at the heating systems installed and at the lighting. What percentage is low energy? Do you have a flue gas heat recovery system, or a waste water heat recovery system. If so, ensure your DEA sees your documentation.

EPC, energy assessment

Don't keep your fingers crossed for a good result on your EPC, provide the documentation

The property – to calculate the cubic volume of the property, the energy assessor will measure the property and draw a floor plan.

Once all the data is collected, the DEA will enter the information and generate the actual Energy Performance Certificate. Keep a copy of this, as under current legislation, the EPC is valid for 10 years. The estate agent will need the certificate, and will attach the front page to your property sales particulars.


Home Inspection Services in Rossendale, provide independent property advice, offering EPCs, surveys, inventories, floor plans, and property marketing. Ring us on 01706 600540.


4 Responses to What is assessed during an EPC?
  1. […] can’t find universal agreement on what constitutes an ideal home. I can remember undertaking an EPC at a very large detached property with cinema, gym and pool, located close to the sea front.  Even […]

  2. […] Today the sun is shining, it’s my birthday and I have just completed two very different energy inspections for energy performance certificates (EPCs). […]

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