DECs | Display Energy Certificates

What are DECs?

Display Energy Certificates (DECs) are a legal requirement for public buildings in the UK that are frequently visited by the public and have a floor area of over 250m². DECs are designed to show how energy-efficient a building is by displaying actual energy usage over the past year. 

At CES, we help organisations easily obtain and renew DECs, ensuring you meet your compliance obligations, avoid penalties, and demonstrate a commitment to energy transparency and performance improvement. 

Who Needs DECs?

You must display a valid DEC if your building: 

  • Is publicly accessible (e.g. schools, hospitals, libraries, council offices) 
  • Has a floor area greater than 250m² 
  • Is occupied by a public authority or institution providing a public service 
  • For buildings over 1000 – the DEC must be renewed each year. 

Our Approach

CES will appoint a qualified DECs surveyor to produce the DEC’s report, ensuring full compliance and minimal disruption to your operations. Here’s how we support you: 

Our consultants will determine whether your buildings are subject to a DEC under current regulations. 

Our consultants gather 12 months of energy consumption data and building information. 

Our consultants conduct the necessary analysis, including site visits as required

Our consultants produce and register your Display Energy Certificate and Advisory Report. 

Our consultants track renewal deadlines and proactively notify you when updates are due.

For multi-site organisations, we streamline the process and manage certificates across all locations.

Benefits of CES's DECs Service

Legal Compliance

Meet your statutory obligations and avoid fines

Public Transparency

Visibly demonstrate your building’s energy performance

Actionable Insights

Use the Advisory Report to identify improvement opportunities 

Audit-Ready

Maintain clear, accessible documentation for inspections 

Ongoing Support

We manage renewals and updates, so you never miss a deadline

Stay Visible and Compliant

From energy data collection to certification and timely renewals, CES ensures your DECs compliance is accurate and fully managed by experts.