Commercial EPC for business premises.
Understand when business premises may need an EPC, why non-domestic assessment differs from domestic SAP and how to find the right assessor.
What is a commercial EPC?
A commercial EPC rates the energy efficiency of business premises from A to G. GOV.UK says one may be required when premises are sold or rented, when construction is completed, or after certain changes to separate occupation and fixed building services. The correct non-domestic assessor route depends on building complexity.
Non-domestic method
Commercial buildings use the applicable National Calculation Methodology route rather than the domestic SAP workflow.
Building complexity matters
The assessor level and modelling route depend on the features and complexity of the premises.
Check exemptions and duties
Use current official guidance for the actual building. This page does not decide legal applicability.
How to prepare for a commercial EPC assessment
Give the assessor reliable building and services information. Missing evidence can affect how the building is represented.
- 1
Check whether an EPC is required
Review the current GOV.UK business-premises guidance and any relevant exemption.
- 2
Find a suitable commercial assessor
Match assessor competence to the building complexity and features.
- 3
Gather building evidence
Prepare floor areas, zoning, fabric, lighting, HVAC, controls, activity and construction information.
- 4
Review the completed record
Check the property, rating, date, reference and recommendations before relying on it.
Which official sources support this answer?
The links below own the register, assessment or methodology claim. Check them again when making a current regulatory or certification decision.
Official sources used for this page
Adelphos does not issue a lodged EPC, appoint an assessor through this page or guarantee a rating change.
What should you read next?
These links move to a different user task rather than repeating this page's primary query.
Frequently asked questions about commercial EPC.
Is a commercial EPC rated A to G?
Yes. GOV.UK business-premises guidance describes commercial EPC ratings from A, the most efficient, to G.
Does a commercial EPC use SAP?
Non-domestic buildings use a different methodology from domestic SAP. The government SAP guidance identifies SBEM as the simplified method used for non-domestic buildings.
How much does a commercial EPC cost?
GOV.UK states that cost depends on the building being assessed. Ask an appropriately qualified commercial assessor for a scope-specific quote.
Does Adelphos issue an official EPC?
No. An official EPC must be produced and lodged through the applicable accredited-assessor process. Adelphos can calculate and compare supported scenarios, but its calculation output is not a lodged certificate.
The user is responsible for verifying every input, assumption, method, result and its suitability, and for obtaining competent-person review. Adelphos accepts no responsibility for decisions made using a calculation. Adelphos scenario output is not an official EPC or an equipment recommendation.
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