DECs for public buildings across Ireland: assessed by a registered DEC assessor, registered with SEAI, and renewed every year before they lapse.
A Display Energy Certificate shows how a building actually performs. Where a commercial BER is an asset rating based on the building's design, fabric and systems under standard conditions, a DEC is an operational rating: it is calculated from the building's real, metered energy consumption over the previous twelve months and compared against a benchmark for buildings of the same type. The result is presented on a familiar A to G scale and must be displayed where the public can see it.
The two certificates answer different questions. The BER says what the building is capable of. The DEC says how it is being run. Public buildings frequently need both.
A DEC is required for a building occupied by a public body, with a total useful floor area over 250 square metres, that is frequently visited by the public. For other buildings providing a public service, the threshold is 500 square metres. Schools, libraries, council offices, third-level buildings, healthcare facilities and similar premises across Ireland fall squarely within the requirement.
The certificate must be displayed in a prominent place, clearly visible to visitors. Responsibility for obtaining and displaying a valid DEC rests with the building's owner or occupier, and compliance is enforced by the local Building Control Authority.
A DEC is valid for one year, with the accompanying advisory report running on a longer cycle, so the annual renewal is usually a data-and-calculation exercise rather than a full resurvey. Because the certificate is annual, it lapses quietly: nothing breaks, no reminder arrives, and the building is non-compliant until someone notices. That is why we run a renewal reminder service, free, for any building. See below.
Energy data review. We gather and analyse twelve months of metered consumption: electricity, gas and any other fuels serving the building.
Site survey. A registered DEC assessor measures the building and walks it with your facilities contact, recording heating, hot water, controls, lighting and ventilation, and noting anything materially affecting energy use.
Calculation and registration. The operational rating is calculated using SEAI's methodology, benchmarked against your building category, and the certificate is registered and issued with its advisory report.
Practical recommendations. Because the DEC reflects how the building is run, the advisory report often surfaces low-cost operational wins, scheduling, controls and metering improvements, that move next year's rating without capital spend.
Tell us your building's renewal month and we will email you well before the certificate expires, with everything needed to schedule the reassessment. Free, whether or not we carried out your current DEC.
Free. One reminder before renewal, nothing else.
Local authorities, education bodies and healthcare organisations rarely have just one building over the threshold, and if that is your desk, our facilities managers page describes the whole programme. Our portfolio service handles DEC programmes across an estate the same way it handles BERs: one schedule, one programme, one invoice, and a quarterly review of upcoming expiries so the whole estate stays compliant.
Tell us about the building and we will call you back with your free quote within 24 hours.
Callback with your quote within 24 hours
We'll call you back with your free quote within 24 hours.
Urgent? info@commercialber.ie