EPC guide 06
EPCs when buying or selling a home
An Energy Performance Certificate sits quietly in the background of most home moves, yet it carries useful, comparable information for both sides. This guide explains what a seller has to provide, where the certificate appears and how a buyer can read it sensibly as part of their own checks.
What the seller has to provide
When a home is marketed for sale in England, Wales or Northern Ireland, a valid EPC is normally required, and it should be commissioned before the property goes on the market. The obligation usually falls on the seller or the person acting for them, and the certificate must be made available to prospective buyers. Scotland runs an equivalent regime and additionally requires the certificate to be physically affixed within the property.
In practice the estate agent will often arrange the assessment, which is carried out by an accredited domestic energy assessor and lodged on the government EPC register. If you are selling, it is worth confirming that a valid certificate exists early, because arranging one late can hold up marketing. For more detail on when a certificate is needed, see our guide to when you need an EPC.
Where the certificate appears
Property listings usually display the EPC in one of two ways: the coloured A–G rating graphic embedded in the advert, or a link to the full certificate on the government register. The headline is the band and the numeric score behind it, but the certificate itself contains far more, including the property’s construction, heating, and a list of suggested improvements.
If a listing only shows the band, you do not have to wait for the agent to send the rest. The full record is public, so you can look it up yourself using the address or postcode and read the underlying detail before you view or make an offer.
How long a certificate lasts
A domestic EPC is normally valid for ten years, or until a newer one is produced for the same property. A certificate remains formally valid even if the home has changed since the assessment, so a valid date does not guarantee the description is still accurate. If the existing EPC is old, or predates obvious improvements, a fresh assessment can give a more representative picture, though it is not compulsory simply because time has passed.
For a buyer, the assessment date is part of the evidence. Read it alongside the fabric and heating sections, and treat a certificate that predates a renovation as a snapshot of the property as it once was, not as it is today.
What a buyer can learn from the certificate
- The energy band and score, which allow a rough comparison between homes.
- Descriptions of walls, roof, floors, windows and heating as recorded by the assessor.
- Recommended improvements, from low-cost measures to larger fabric or heating works.
- The assessment date, which tells you how current the picture is likely to be.
- Indicative running-cost and energy figures, which are modelled rather than measured.
Reading it as due diligence — and its limits
An EPC is a helpful early document, but it is not a survey or a condition report. It does not assess damp, structural soundness, the state of repair or whether measures were installed correctly. A property can hold a good band and still need work, or carry a poor band and be perfectly sound but inefficient. Use the certificate to frame questions, not to replace a proper survey.
The recommendations are generated by the approved methodology from standard assumptions, so they indicate the type of improvement that could help rather than a costed, property-specific plan. Our guide to reading an EPC explains how to separate the headline rating from the underlying features and assumptions that produced it.
Running costs are modelled, not a bill
The estimated energy costs shown on an EPC are calculated for a standard pattern of occupancy and typical fuel prices at the time of assessment. They are useful for comparing one home against another on a like-for-like basis, but they are not a forecast of what a particular household will actually pay. Real bills depend on how many people live there, how the home is heated and used, and prices that move over time.
Treat the cost figures as a relative indicator rather than a budget. If running costs matter to your decision, ask the seller about recent bills and read them alongside the EPC rather than in place of it.
Questions worth asking the seller
Because a certificate captures the property at a moment in time, it is sensible to ask what has changed since the assessment date. Has loft or wall insulation been added? Have windows been replaced or the heating system upgraded? If improvements were made, ask for the specifications, warranties or installation records, since these tell you more than the EPC alone and are worth keeping with the property information.
You can also cross-check the certificate yourself on the public register before you commit, confirming that the record matches the address and reflects the home you are viewing. EPC Checker surfaces that public data to help you research a property, but it is a research aid, not an assessment, survey, or professional, legal or financial advice. For decisions that turn on condition, value or compliance, seek advice from a qualified professional.