- As a broad UK guide in 2026, a small, simple commercial unit starts from around £150 to £350, with larger or more complex buildings running to £1,000 or more.
- The biggest single driver is the assessment level: simpler SBEM assessments cost less than the dynamic simulation modelling (DSM) that complex buildings need.
- Floor area, number of zones, and the complexity of heating, cooling and ventilation all push the price up.
- Check for an existing valid EPC first. A certificate lasts ten years, so you may not need a new one at all.
A commercial EPC doesn't have a single price, and anyone who quotes you one sight unseen is guessing. A small, simple shop unit and a multi-let office with complex air conditioning are very different assessments, and the fee reflects that. The good news is the range is predictable once you know what drives it. Here's what a non-domestic EPC costs in 2026 and where your building is likely to sit.
How much does a commercial EPC cost in 2026?
There's no fixed fee, because the work varies enormously. As a broad guide for UK commercial property in 2026:
| Property | Indicative fee (guide only) |
|---|---|
| Small, simple unit (shop, small office) | from around £150 to £350 |
| Mid-size premises with some services | around £350 to £750 |
| Large or complex building (multi-zone, air conditioning) | £750 to £1,500+, quoted on inspection |
These are indicative market ranges, not a quote. The only way to know your figure is to have accredited assessors price your specific building, which is free and no-obligation.
What drives the price
- Assessment level. This is the big one, and we cover it below. A simple building modelled with SBEM is cheaper than a complex one needing dynamic simulation.
- Floor area and layout. More space and more separate rooms or units mean more to measure and record.
- Number of zones. An EPC model divides the building into zones by use and servicing. More zones means more work.
- Building services. Complex heating, cooling, ventilation and controls take longer to survey and model than a simple heated shell.
- Information available. Good drawings and plant information speed the job up. A building with no records takes longer to measure and document.
Why the assessment level matters most
Non-domestic EPCs are produced at a level that matches the building's complexity, and the assessor must be accredited to that level:
- Simpler buildings are assessed using SBEM (the Simplified Building Energy Model). Think a straightforward shop, office or warehouse with standard heating and lighting.
- Complex buildings, for example those with significant air conditioning or unusual designs, may need Dynamic Simulation Modelling (DSM), which is more involved and carried out by a higher-level assessor.
This is why two buildings of similar size can be priced very differently. The floor area is only part of the picture. What really moves the fee is how complex the building and its services are, and therefore which method and accreditation level the job requires.
What the fee includes
A commercial EPC fee typically covers a site survey, the energy modelling, production of the certificate and a recommendation report, and lodging the certificate on the national register so it's valid and searchable. Ask what's included when you compare quotes: a slightly higher fee that includes clear improvement advice can be better value than a bare-minimum certificate, especially if you're using it to plan MEES compliance.
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How to keep the cost sensible
- Check for an existing EPC first. Search Find an energy certificate. If there's a valid one, you may not need a new assessment at all.
- Have your information ready. Floor plans, plant schedules and details of any recent upgrades help the assessor work efficiently.
- Get more than one quote. Fees vary between assessors, and comparing is free.
- Bundle related work. If you're also arranging a survey, one firm may price the package more keenly.
Why the cost is small next to the risk
An EPC fee in the hundreds is minor against what it unlocks. Without a valid certificate you cannot lawfully sell or let. And under MEES, letting a sub-standard building can carry penalties up to £150,000, quite apart from the lost rent while a property sits unlettable. A modest assessment fee is what tells you where you stand and what, if anything, you need to do.
How to get accurate quotes
To price the job, assessors need a few basics: the property type, its approximate floor area, the location (postcode), how the building is serviced, and your timescale. With that, accredited energy assessors who cover your area can give you a no-obligation quote to compare. ComSurv matches you with them in about a minute.
Sources & further reading
- Find an energy certificate (GOV.UK) — check for an existing EPC before commissioning a new one
- Non-domestic private rented property: minimum energy efficiency standard (GOV.UK) — why the rating, not just the certificate, matters
- RICS Find a Surveyor — find RICS-regulated professionals
External links open in a new tab. ComSurv is a matching service, not a firm of surveyors, and is not affiliated with these organisations. This article is general information, not legal, surveying or valuation advice; take advice on your specific situation.
