Display Energy Certificate (DEC)
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A Display Energy Certificate (DEC) provides a clear snapshot of a building’s actual energy usage — known as the operational rating. It helps the public assess how energy-efficient a public building is, using data collected from gas, electricity, and other utility meters. DECs must be prominently displayed at all times in buildings open to the public.
✅ What Is a DEC?
A DEC reflects the energy performance of a building based on actual consumption over a 12-month period. It considers electricity, gas, and other fuel types. If full meter readings aren’t available, an estimate from your energy supplier can be used. A DEC must be updated annually, with an Advisory Report issued every 7 years.
📌 Who Needs a DEC?
A DEC is legally required for buildings that:
- Have a useful floor area over 500m² (reduced to 250m² after 9 July 2015),
- Are occupied by a public authority or an institution providing a service to large numbers of people,
- Are frequently visited by the public.
Private organisations within such buildings are not required to display a DEC.
🔍 What Does a DEC Include?
Each certificate provides:
- Operational rating (how the building performs)
- Asset rating (how it was built – if applicable)
- CO₂ emissions from the past 2 years
- Legal benchmarks or standard comparisons
- Building type, address, and total useful floor area
- Name & accreditation of the assessor
- Unique DEC reference number
Note: If a tenant has occupied the building for less than 15 months, the operational rating is not required.
🏫 Campus & Unmetered Sites
For campuses with multiple buildings:
- If buildings are linked (heated/ventilated by the same system), a DEC is required.
- When sub-metering is unavailable, energy usage is proportioned based on each building’s floor area.
- Each building must display its own individual DEC using site-level metered data, apportioned accordingly.
📋 How to Get a DEC
Only an accredited DEC energy assessor can issue a certificate and advisory report. The process includes:
- Reviewing your building’s energy consumption and fuel data,
- Making adjustments for usage patterns, occupancy, weather, etc.,
- Using government-approved software to calculate and lodge the certificate to the national register.
⚡ Why Choose Us?
- ✅ 24-hour delivery
- ✅ Nationwide coverage
- ✅ Order online, via call, or text
- ✅ Reports emailed within 24 hours
- ✅ Trusted by many legal and public-sector clients
Need a DEC for your building?
Contact us now to arrange a quick, compliant, and competitively priced assessment.
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