DEC vs EPC Explained
Display Energy Certificates (DECs) and Energy Performance Certificates (EPCs) are both important parts of building energy compliance across the UK. Although they are often confused, they serve different purposes and apply to different types of buildings and operational requirements.
Fading Footprints Ltd provides professionally managed DEC and Commercial EPC services for schools, universities, councils, public sector organisations and commercial property portfolios across the UK.
What Is a Display Energy Certificate (DEC)?
A Display Energy Certificate (DEC) measures the actual operational energy performance of a building based on measured energy consumption.
The certificate provides an operational energy rating and is accompanied by a Recommendation Report identifying opportunities to improve building efficiency and reduce energy usage.
DECs are commonly associated with public buildings occupied by public authorities and frequently visited by the public.
Typical buildings requiring DECs include:
- Schools & Academies
- Universities & Colleges
- Council Offices
- Libraries
- Leisure Centres
- Healthcare Buildings
- Public Sector Estates
What Is an Energy Performance Certificate (EPC)?
An Energy Performance Certificate (EPC) measures the theoretical energy efficiency of a building based on its construction, services and building fabric.
EPCs are commonly required for:
- Property sales
- Commercial lettings
- New leases
- Construction projects
- Compliance and property management purposes
Commercial EPCs are widely used across:
- Offices
- Retail Buildings
- Industrial Units
- Educational Buildings
- Healthcare Buildings
- Commercial Property Portfolios
What Is the Main Difference Between a DEC and EPC?
The main difference is how the building is assessed.
A DEC measures:
Actual energy usage and operational performance.
An EPC measures:
Theoretical energy efficiency based on the building itself.
In simple terms:
- A DEC looks at how a building performs in real operation
- An EPC looks at how energy efficient the building is designed to be
Which Buildings Require DECs?
DECs are generally required for buildings:
- Occupied by public authorities
- Frequently visited by the public
- Above the applicable floor area threshold within current legislation
This commonly includes:
- Schools
- Universities
- Council Buildings
- Public Sector Estates
Which Buildings Require EPCs?
Commercial EPCs are commonly required for:
- Commercial property sales
- New leases
- Lease renewals
- Construction and refurbishment projects
- Property compliance purposes
This can include:
- Offices
- Retail Units
- Warehouses
- Industrial Buildings
- Public Buildings
- Educational Facilities
How Long Do DECs & EPCs Last?
The validity period differs between DECs and EPCs depending on the building type and applicable regulations.
Many larger public buildings require ongoing annual DEC renewal, while Commercial EPCs commonly remain valid for longer periods unless circumstances change.
Can A Building Require Both A DEC And An EPC?
Yes. Some buildings may require both a Display Energy Certificate and an Energy Performance Certificate depending on how the building is used and the compliance requirements involved.
This is common within larger public sector and educational estates.
Managing Compliance Across Large Estates
Fading Footprints Ltd has extensive experience supporting organisations managing large and complex property portfolios requiring both DEC and EPC compliance.
Our structured approach includes:
- Monitoring compliance expiry dates
- Coordinating surveys across multiple buildings
- Managing annual renewal programmes
- Grouping visits geographically where practical
- Supporting estates and facilities teams
- Providing organised communication and reporting
We regularly support:
- Local Authorities
- Schools & Academy Trusts
- Universities & Colleges
- Public Sector Estates
- Commercial Property Portfolios
Why DEC & EPC Compliance Matters
DEC and EPC compliance helps organisations:
- Maintain legal compliance
- Monitor building performance
- Improve operational efficiency
- Identify energy saving opportunities
- Support carbon reduction objectives
- Support wider estate management strategies
For many organisations, energy compliance forms part of a broader sustainability and operational management programme.
Frequently Asked Questions
What is the difference between a DEC and EPC?
A DEC measures actual operational energy usage, while an EPC measures theoretical energy efficiency.
Do schools require DECs?
Many schools and educational buildings require Display Energy Certificates.
Are EPCs required for commercial buildings?
Yes. Commercial EPCs are commonly required for sales, lettings and compliance purposes.
Can a building require both a DEC and EPC?
Yes. Some buildings may require both depending on usage and compliance requirements.
Can you manage DEC and EPC compliance across large estates?
Yes. Fading Footprints Ltd regularly supports large and complex multi-site property portfolios.
Do you provide nationwide coverage?
Yes. Fading Footprints Ltd provides DEC and Commercial EPC services across the UK.
Speak To Our Team
If you require support with Display Energy Certificates (DECs), Commercial EPCs or wider energy compliance management, our team is available to help.
Contact Fading Footprints Ltd
Email: info@fadingfootprints.co.uk
Address: Leeds City West, Building 3, Leeds City West Business Park, Leeds, LS12 6LN
Fading Footprints Ltd provides professional DEC, Commercial EPC and energy compliance services for public sector and commercial organisations across the UK.