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Energy Performance Certificate (EPC)

An Energy Performance Certificate (EPC) is required under Approved Document L of the Building Regulations for England and Wales and Section 6 of the Technical Handbook for Scotland and requires provision before the building regulation/building warranty final certificate can be issued.

The main aim of the EPC survey is to advise the building occupier or potential purchaser how energy efficient the home is.  An Energy Performance Certificate is similar to the type of certificate provided when you purchase, for example, a new fridge or freezer, a simple traffic light system is used.


To create an EPC rating, work starts at the design stage where a design stage EPC calculation is identified. The building is then constructed and a final EPC test is carried out.


The review and EPC test is undertaken by a trained and licensed domestic energy assessor.  They will carry out the initial review and then on completion, carry out a SAP (Standard Assessment Procedure) calculation.  Both stages are undertaken by entering information about the building design, including information such as insulation details, window and floor areas and heating systems, into bespoke software. This software then calculates the energy performance of the new structure.

The assessor lodges the rating with the relevant licensing body and issues the energy performance certificate directly to you.


Build-Zone has an in-house team Build-Zone Survey Services Limited (BZSS) has established a network of surveyors and approved inspectors who are able to facilitate energy performance services for your development. They are also able to arrange SAP assessments, air pressure testing, water calculations and extract fan testing.  Please follow the link above for further information.


Home energy efficiency chart
Over 25 years' industry experience
In-house technical support
Widely accepted by UK lenders
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