Important Changes to the Display Energy Certificate

Businesses, News – Thursday, October 8th, 2020

The Energy Performance of Buildings Regulations for England and Wales” came into effect on the 1st October 2008 and has since required all buildings within a certain criteria to present a valid Display Energy Certificate (DEC).

The criteria for to determine which buildings qualify are as follows:

  • Total useful floor area is greater than 250m2
  • Occupied in part, or whole by a public sector organisation
  • Visited by members of the public

Typical examples of qualifying buildings include universities, schools, leisure centres, museums and government buildings.

Recently, there have been two significant changes made to the way DECs are formatted and lodged with the national register.

Firstly, DECs are no longer registered through the previously used ‘Landmark’ register, but have now been replaced by This can also be used to find a DEC assessor as well as if you are looking to find a buildings previous DEC or Advisory report.

Secondly, the layouts of the certificate itself have been updated from the previous format. The image on the left illustrates the previous layout whilst the image on the right represents the new. The formats are broadly the same however, there are a few key differences. For example, the graph representing ‘Total CO2 Emissions’ has now been replaced with a table to illustrate the building’s results precisely. The operational rating for the building has also been highlighted on the new layout to make it clearer to the reader exactly what rating has been achieved.


The CCCA can support your business by providing Display Energy Certificates as well as Advisory Reports. If this is of interest, please contact: For further information and details of how to read and understand a DEC, you can download this guide: CCCA-Display Energy Certificates Guide V2.