Display Energy Certificates (DEC) for Public Buildings


A DEC Display Energy Certificate is required for buildings with a total useful floor area over 250m2 that are occupied in whole or part by public authorities and frequently visited by the public.  The purpose of a DEC Display Energy Certificate is to raise public awareness of energy use and to inform visitors about the energy use of a building.  

A DEC Display Energy Certificate provides an energy rating of the building from A to G, where A is very efficient and G is the least efficient and are based on the actual amount of energy used by the building over the last 12 months within the validity period of the DEC Display Energy Certificate.  An affected organisation must display a DEC Display Energy Certificate in a place clearly visible to the public and have in its possession a valid advisory report.  

Only buildings with a total useful floor area greater than 250m2, occupied by a public authority and frequently visited by the public require a DEC Display Energy Certificate. Private organisations, including those that may share a building with a relevant institution, do not need to display a DEC Display Energy Certificate, but may elect to do so on a voluntary basis


What areas do you provide Display Energy Certificates?

We work closely with a panel of Non-Domestic Energy Assessors who are fully qualified to provide Commercial EPCs, Display Energy Certificates and SAP Reports (On Construction EPCs) throughout the whole of Essex.  All members of our panel of Non-Domestic Energy Assessors are fully accredited and insured, and we have Assessors qualified to NDEA Level 3, Level 4 and Level 5 Standards

What properties require a Display Energy Certificate?

Public authorities must have a DEC for a building if all the following are true:

  • it’s at least partially occupied by a public authority (eg council, leisure centre, college, NHS trust)

  • it has a total floor area of over 250 square metres

  • it’s frequently visited by the public

How long is a Display Energy Certificate valid for?

DECs last for 1 year for buildings with a total useful floor area more than 1,000 square metres.  They last for 10 years when the total useful floor area is over 250 square metres and up to 1,000 square metres.

Our Display Energy Certificates (DEC) are provided by third party partners, and as such we cannot provide a quote or advise over the phone.  Please fill in our quote request form and out partners will call you back

Can I get a quote for a Display Energy Certificate over the phone?

No, we cannot quote for a Commercial EPC, Display Energy Certificate or a SAP Report over the phone as we work with many Non Domestic Energy Assessors and SAP Assessors.  Your location and requirements will dictate which assessor is instructed and the price they charge.  Please complete the quote request form so we can source the most suitable assessor and the best price for you

Request a Display Energy Certificates (DEC) Quote

Please note we cannot offer advice or provide a quote over the phone for Display Energy Certificates (DEC) for Public Buildings. To request a call back from our partner Non Domestic Energy Assessors please complete the following form


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