EPC Certificates Explained
Energy Performance Certificates (EPCs) are a legal requirement for most buildings when they are built, sold or rented. They provide an indication of how energy efficient a property is and highlight opportunities to reduce energy consumption, carbon emissions and operating costs. In this article, we explain what an EPC is, who needs one, and why understanding your building's energy performance is becoming increasingly important.
What Is an Energy Performance Certificate?
An Energy Performance Certificate measures the theoretical energy efficiency of a building based on its construction, insulation, heating systems, lighting and other building services.
Buildings receive a rating from A to G, with:
A representing excellent energy performance.
G indicating poor energy efficiency.
The certificate also includes recommendations for improvements that could help reduce energy consumption and improve future ratings.
Most EPCs remain valid for ten years.
Who Needs an EPC?
An EPC is typically required when:
A building is constructed.
A property is sold.
A commercial building is leased to a new tenant.
Significant alterations are made to a building.
Both domestic and non-domestic properties can require EPCs, although the assessment methods differ depending on the building type.
Some buildings may be exempt, including certain listed buildings, temporary structures and places of worship.
Why Are EPCs Important?
Energy Performance Certificates help building owners, tenants and purchasers understand the expected energy costs associated with a property.
A good EPC rating can provide several benefits, including:
Lower operating costs.
Reduced carbon emissions.
Increased property value.
Improved attractiveness to tenants.
Better compliance with environmental legislation.
As sustainability requirements continue to evolve, energy performance is becoming an increasingly important consideration across both public and private sectors.
Minimum Energy Efficiency Standards (MEES)
Commercial landlords should also be aware of Minimum Energy Efficiency Standards (MEES). Current regulations generally prevent the leasing of commercial properties with an EPC rating below the required threshold unless an exemption applies. Understanding your EPC rating and identifying improvement opportunities can therefore help protect asset value and maintain compliance.
EPC vs DEC: What's the Difference?
Energy Performance Certificates and Display Energy Certificates serve different purposes. An EPC measures how a building should perform based on its design and installed systems.
A DEC, on the other hand, measures how a public building actually performs using real energy consumption data. This means a building with a strong EPC rating may still have opportunities to improve operational energy management and reduce consumption.
What Information Is Required for an EPC Assessment?
The information required will vary depending on the building, but typically includes:
Building floor plans and dimensions.
Details of heating and cooling systems.
Lighting installations.
Construction materials and insulation levels.
Information relating to windows and glazing.
Renewable technologies such as solar PV systems.
A site survey is usually undertaken to gather the information necessary to complete the assessment.
What Improvements Can Increase an EPC Rating?
Common measures that can improve building energy performance include:
Upgrading to LED lighting.
Improving insulation levels.
Replacing inefficient boilers or HVAC equipment.
Installing renewable technologies.
Upgrading heating controls.
Improving glazing and reducing air leakage.
Many of these improvements not only enhance EPC ratings but also deliver measurable reductions in energy costs.
Why Should Businesses Review Their EPC Performance?
Although an EPC may only need renewing every ten years, reviewing energy performance on a more regular basis can deliver significant benefits.
Organisations that proactively improve building efficiency can:
Reduce operational expenditure.
Support Net Zero ambitions.
Improve employee comfort and wellbeing.
Increase property values.
Demonstrate environmental responsibility to customers and stakeholders.
Understanding building performance today helps businesses prepare for future regulatory requirements and energy challenges.
Need Support With Your Energy Performance Certificate?
At Douglas Energy Solutions, we support organisations across the UK with commercial Energy Performance Certificates and wider energy management services.
Our team provides straightforward, practical advice to help businesses understand compliance requirements while identifying opportunities to improve efficiency and reduce costs.
If you require a new EPC, a renewal, or guidance on improving your building's energy performance, get in touch with our team today.