What we do, and who for
We produce commercial (non-domestic) Energy Performance Certificates for business owners, occupiers, commercial landlords and managing agents across England and Wales. If you are selling, letting or refurbishing commercial premises, a valid EPC is a legal precondition of the transaction, and it has to come from an accredited assessor who surveys the building, models it correctly and lodges the certificate on the national register so the deal can complete.
Every valid commercial EPC is the work of an accredited Non-Domestic Energy Assessor. That accreditation is not a badge of convenience: only an assessor who is a member of a government-approved scheme, and qualified to the level a building requires, can produce a legally valid commercial EPC. A certificate from anyone not properly accredited, or lodged incorrectly, is not valid, which is exactly when a cheap unaccredited "EPC" leaves an owner exposed, in the middle of a sale or a letting.
Assessed to the right level
Non-domestic assessments use one of two methods, and matching the building to the correct method is where accuracy comes from. The Simplified Building Energy Model (SBEM) covers most buildings, split into Level 3 for smaller, simple premises and Level 4 for larger or multi-service buildings and all new-build. The most complex buildings, those with atria or advanced HVAC controls SBEM cannot model reliably, need Dynamic Simulation Modelling (DSM), a Level 5 assessment. The right assessment level depends on your building, and this site explains why, so you can see when you are being upsold.
Current on the rules
The rules around commercial EPCs and MEES are moving, and a great deal of the advice online is out of date. The minimum standard to let non-domestic property is EPC E, and since 1 April 2023 it has been unlawful to continue letting below E, not just to grant a new lease. On 18 June 2026 the government confirmed that, subject to secondary legislation, privately rented non-domestic buildings over 1,000 sqm are proposed to reach EPC B by 2031, and it dropped the previously floated interim EPC C milestone for 2027. This site follows the rule that applies to your specific building. Guidance that still quotes the earlier 2027 and 2030 dates is out of date.
Honest by default
We would rather tell you the uncomfortable answer early than a comfortable one late. If your building is genuinely exempt, we will say so rather than sell you a certificate you do not need. If it comes back F or G, we hand you the ranked improvement roadmap and the cheapest route back over the E line, not just a fail. And we are transparent about price: a commercial EPC is priced on the building, and we explain what drives the fee. This site is operated by SEO Dons Ltd; the certificates are produced by accredited assessors working to the government-approved schemes named below.