Energy Performance Certificates (EPC)

S J Treloar & Associates are able to undertake Energy Performance Certificates, sometimes referred to as EPC’s, on existing dwellings and commercial premises around Witney and Carterton, Oxfordshire.

EPC WitneyUnder the Energy Performance of Buildings Regulations, it is a requirement that Energy Performance Certificates are available for every building that is constructed, sold or let. This allows the purchaser to identify efficiency of the building.  An EPC is calculated by looking at the way the building is constructed and heated.  Through the use of BRE accredited computer software modelling, the buildings efficiency is calculated on a scale of A-G, with A being the most efficient, and G being the least.

S J Treloar & Associates employ an accredited Domestic Energy Assessor (DEA) who would undertake a site survey to gather the data to input into the computerEPC Carterton modelling software to produce the final EPC.

Working closely with a Non Domestic Energy Assessor who can undertake data collection and computer modelling, S J Treloar & Associates are also able to produce Energy Performance Certificates for non-domestic properties such as Offices, Factories, public buildings, places of worship, and other places of work.  We can also advise whether a Display Energy Certificate would be required for a public building, and arrange for this to be undertaken.

Should you wish to consider further how to increase the energy performance of a property, then we are able to undertake an Energy Assessment service, where we can look at the energy being used, and consider the best ways to reduce running costs. For more information, please refer to our Energy Assessments page.

For new houses which are currently being designed, these require a SAP calculation to be undertaken. This is later converted into an Energy Performance Certificate for the building.  For further information, please refer to our SAP assessments page.

To speak to us about Energy Performance Certificates and EPC’s, or to see how S J Treloar can help you, please contact us on 01993 883510 or email us at

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