Property buyer guide

How to check an EPC before buying a house

An Energy Performance Certificate is a starting point for questions about the home’s energy performance. Read the underlying details and date alongside the rating, then check what has changed since the assessment.

Published by SashMark · · For buyers in England

Find the certificate for the exact home

Use the official government energy-certificate service to search by postcode, street and town, or certificate number. Check the address carefully, especially in converted buildings with several flats or multiple entrances.

Save the certificate link and assessment date. If several records appear, confirm which belongs to the home you are buying. In SashMark, an ambiguous match is withheld rather than silently assigning another property’s certificate.

Read beyond the headline energy rating

Review the recorded floor area, heating description and recommendations alongside the rating. These details help you ask focused questions about comfort, likely improvement work and the differences between otherwise similar homes.

The certificate records an assessment at a particular time. If the seller says insulation, windows or heating have changed, ask for dates and supporting documents. A mismatch with the listing may reflect later work, a measurement difference or an incorrect match; investigate before choosing an explanation.

  • Does the full address match the home and flat number?
  • When was the assessment carried out?
  • Does the recorded heating match what you saw?
  • How does floor area compare with the listing?
  • Which recommended measures have already been completed?

Use recommendations to organise enquiries

Make a list of possible measures and separate work already done from work still proposed. Ask an appropriate installer or surveyor about suitability and obtain current quotes before building improvements into your budget.

Do not treat potential performance as the home’s current performance. Nor should a historic cost estimate be treated as a guaranteed present-day bill: occupancy, heating habits and tariffs can differ. The useful outcome is a clearer set of questions, not an exact promise of future spending.

Keep energy evidence separate from building condition

An EPC is not a structural inspection. A reasonable energy rating does not rule out damp, roof defects or other issues, and a lower rating does not tell you the cause or cost of every problem.

Bring discrepancies to the viewing and survey process. For example, if the certificate describes a heating system that is no longer present, ask for the replacement’s details and servicing records. SashMark can bring available EPC evidence into the report, but missing or uncertain records remain labelled.

Common questions

Can I find an EPC without paying for a property report?

Yes. The government’s certificate search is publicly available. SashMark adds convenience by combining confidently matched evidence with other property research where available.

Does the EPC prove the advertised floor area?

Treat it as a recorded measurement to compare, not automatic proof that the listing is correct. Check the dates, measurement basis and any later alterations if the figures differ.

Sources and how to use this guide

This guide combines practical research suggestions with the official services below. It is general information; property-specific survey, valuation and legal questions need the appropriate professional.

Read how SashMark handles sources, matching and missing evidence.

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