Display Energy Certificates (DEC) in London
Arrange a Display Energy Certificate for a qualifying public building in London, using its measured energy consumption and occupancy information.
Request a DEC assessment
The first step is to confirm whether the building is in scope and gather the consumption and occupancy information for the assessment.
Understand the serviceAbout Display Energy Certificate (DEC)
A different kind of energy rating
A DEC is based on actual energy consumption, usually over the preceding 12 months. That makes it different from an EPC, which models a building’s energy performance.
Check whether the building is in scope
A DEC is required for qualifying buildings occupied by a public authority, frequently visited by the public and above the applicable floor-area threshold. Requirements differ by size, including the certificate validity period.
Collect the evidence
An accredited DEC assessor needs building area and use, occupancy information and suitable energy consumption records. The certificate is displayed for visitors, and a valid advisory report must be held.
For exceptions and full requirements, read the official guidance ↗.
Request your Display Energy Certificate (DEC).
We review the property details and confirm the scope and price before work proceeds.
Display Energy Certificate (DEC) FAQs
Is a DEC required for every commercial building?
No. The duty relates to qualifying public-authority buildings visited by the public. A private commercial building may need an EPC instead.
What data should we collect?
Building details, floor area, use and energy consumption records for the relevant period are the starting point.
Is the advisory report part of the requirement?
Yes. The occupier must have a valid advisory report alongside the displayed certificate.
Related certificates & reports.
Domestic EPC Certificate
For a home you plan to sell or let, check the register first. If a new EPC is needed, tell us about the property and we will arrange the next step.
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Commercial EPC Certificate
Tell us whether the instruction concerns a whole building, a unit or mixed-use space. That distinction matters before the assessment is booked.
Explore this report