What an EPC tells you
An EPC presents a calculated energy rating and recommendations for improving performance. Domestic certificates include information about the building’s fabric, heating and other relevant features. Non-domestic assessments use the approved methodology for their building type.
Calculated energy use and costs rely on standard assumptions. They are not a prediction of your household’s or business’s exact bills: occupancy, operating hours, weather and energy prices can differ.
When a certificate is needed
EPC requirements commonly arise when a building is constructed, sold or let. The precise rules and exemptions depend on the property and the nation in which it is located. For England and Wales, see the government’s EPC guidance.
Do not assume a listed building is automatically exempt. Exemptions have conditions and need to be assessed for the particular circumstances. Our EPB regulations guide links to the relevant official information.
How to get an EPC
- Choose an assessor. Check current accreditation for the required building and assessment type.
- Provide evidence. The assessor explains the documents and access needed. New-build assessments rely on plans, specifications and as-built evidence; existing-building assessments normally involve a visit.
- Review and lodge. The assessor uses approved software and conventions, then lodges the certificate with the relevant register.
- Find the certificate. Use the official register and the property or report details to access it.
Using the recommendations
Recommendations identify possible improvements, such as insulation, building-services changes or renewable technologies. Ask a suitably competent professional about suitability, sequencing, permissions and actual costs before commissioning work. The certificate does not replace a building survey or a design specification.
How long does an EPC last?
Under the current general England and Wales rules, an EPC is normally valid for 10 years. A later certificate, changes to the building or particular transaction requirements can affect which certificate is relevant. Check the current official guidance and the record on the register.
What if something is wrong?
Ask the assessor to explain the inputs and rating. If you think a fact has been recorded incorrectly, provide the relevant evidence. Concerns about an assessor or a certificate lodged through Kaizen can be raised through our free complaints procedure, with an appeal route for formal decisions.