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Display Energy Certificates (DEC)

Accredited Operational Ratings and Advisory Reports for Public and Institutional Buildings

What is a Display Energy Certificate?

A Display Energy Certificate (DEC) evaluates a building's energy efficiency based on its actual operational energy consumption. Unlike an EPC, which models a property’s theoretical asset rating, a DEC reflects real-world utility usage.

The resulting certificate displays an operational rating on an A to G scale. When an organizsation maintains regular annual assessments, the DEC visually tracks year-on-year historical trends on the certificate, providing a powerful metric to demonstrate carbon reduction and energy savings over time.

Is Your Building Legally Required to Display a DEC?

Under UK legislation, non-domestic buildings must legally obtain and prominently display a valid DEC and an accompanying Advisory Report (AR) if they meet the following criteria:

  • Occupied in whole or part by public authorities, statutory institutions, or publicly funded organisations.

  • Frequently visited by members of the public.

  • Maintain a total useful floor area greater than 250m².

Up Energy provides comprehensive public sector assessments for an array of institutional assets throughout the South West, including:

  • NHS hospitals, clinics, and local GP surgeries

  • Primary schools, secondary academies, and university campuses

  • Local authority leisure centres, libraries, and civic offices

Private Sector DECs: While mandatory for the public sector, forward-thinking private businesses frequently commission voluntary DECs. It serves as an objective, year-on-year benchmark to anchor internal corporate sustainability targets and ESG reporting.

Display Energy Certificate (DEC) operational rating scale showing bands from A (0-25) to G (150+), with an example building rated 38 B. The dotted line at 100 indicates the typical benchmark for similar buildings

Information Required for a DEC Assessment

Display Energy Certificates can only be calculated, validated, and legally lodged by a fully accredited DEC Assessor. To compile the operational rating and the mandatory Advisory Report, our assessment team requires:

  • 12 Months of Energy Data: Uninterrupted records of actual electricity, gas, oil, or biomass consumption spanning a continuous 12-month period.

  • Building Asset Data: Architectural footprints, building envelope specifications, and records of any on-site renewable generation (such as solar PV arrays). If the building holds an existing asset EPC, this can be integrated into the framework.

  • Site Inspection & Operations Audit: A brief site walkthrough evaluating HVAC infrastructure, active ventilation controls, and building management systems. This includes a brief consultation regarding operational schedules and equipment maintenance cycles.

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07515 442665 (Simon)
07974 567272 (Alistair)

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