Display Energy Certificates for public buildings

A Display Energy Certificate shows a public building’s operational energy performance from actual energy use, rather than the modelled rating used in a commercial EPC. It carries an A–G rating and is accompanied by an advisory report about potential improvements.

In England and Wales, a building occupied by a public authority, frequently visited by the public and with more than 250 m² of total useful floor area generally needs a DEC on public display and a valid advisory report. A private organisation can choose a voluntary DEC but does not have the same display duty.

Arrange an initial DEC when a building comes within the public-authority duty, and renew it before its validity ends. The assessor needs building-use information and energy bills or meter data. Check any existing DEC on the government register before requesting another.

For a building over 1,000 m², the DEC lasts twelve months and its advisory report lasts seven years. For a building over 250 m² and up to 1,000 m², both normally last ten years. The floor-area boundary matters, so confirm the total useful floor area.

The occupier may face an enforcement penalty if a valid DEC is not displayed where the public can see it or a valid advisory report is not held. The duty applies only to buildings that meet the legal conditions. Verify the building’s occupancy, area and public access before assuming it is exempt.

The timetable depends on usable energy data, metering arrangements, floor area, building use and site access. The first assessment normally includes a site visit. Shared meters or gaps in records may require further review, so we confirm the scope and timing after seeing the evidence.

Send the address, public-authority occupier, total useful floor area, previous DEC and available energy data. We can assess the likely scope, arrange an accredited DEC assessor and provide a bespoke quote for the certificate and advisory report.