A commercial EPC in England and Wales costs between roughly £150 and £1,500 or more. A small shop or office assessed by a Level 3 assessor sits at the bottom of that range; a large, air-conditioned building that needs Dynamic Simulation Modelling sits at the top, and genuinely complex buildings are quoted individually above it. That is a spread of ten times for what sounds like the same product, and it is the reason two quotes for the same parade of shops can differ by hundreds of pounds. This page prices the market as it stands in August 2026, explains the five drivers behind the spread, and then covers the layer no assessor's price list mentions: whether you can recover the VAT on the fee, and how the cost is deducted against your rental or trading profits.
Everything here applies to England and Wales, where the Energy Performance of Buildings (England and Wales) Regulations 2012 govern EPCs. Scotland and Northern Ireland run separate regimes with their own assessor markets and pricing. And to be clear about scope: this page prices the certificate. Whether your building or transaction needs one at all, including the exemptions and the enforcement rules, is covered in our commercial EPC requirements guide.
What a commercial EPC costs in 2026
The table below is a national benchmark assembled from four published assessor price lists and market guides, checked in August 2026. It is an aggregated market read rather than any single firm's rate card, which matters because most published pricing comes from assessor firms quoting their own fees, often with a London or South East service area. All ranges are quoted excluding VAT, which is how assessors publish them; the VAT section below covers who actually bears that 20%. The ranges are what a commercial owner should expect to pay, and individual quotes will land inside or occasionally outside them depending on the drivers covered in the next section.
| Building band | Typical range, ex VAT (checked Aug 2026) | Typical assessor level | Method | Typical turnaround |
|---|---|---|---|---|
| Small retail or office, under 100m² | £150 to £250 | Level 3 | SBEM | A few days |
| Office or shop, 100 to 250m² | £200 to £350 | Level 3 | SBEM | A few days |
| Unit, 250 to 500m² | £300 to £450 | Level 3 to 4 | SBEM | Up to a week |
| Building, 500 to 1,000m² | £400 to £600 | Level 4 | SBEM | Around a week |
| Large or multi-zone, over 1,000m² | £600 to £1,200+ | Level 4 to 5 | SBEM or DSM | One to two weeks |
| DSM-class (atria, complex HVAC, large glazed facades) | £1,000 to £1,500+, custom quotes above | Level 5 | DSM | Two weeks or more |
Sources: published price lists and cost guides from fast-epc.co.uk, assessmenthive.co.uk, cim.io and epcrate.co.uk, all checked August 2026. Published tiers start at £159 for units up to 25m², and the highest published non-custom figures run to £1,200 and £1,500 or more for large and DSM-class buildings. The assessor level and method columns are typical pairings, not price lists: levels track building complexity, and no accreditation scheme publishes per-level pricing, a point worth holding onto when a quote arrives with a level attached and a premium attached to it.
Set the fee against the certificate's 10-year life under regulation 9(2) and it looks different: a £350 certificate is £35 a year of regulatory cover, across every letting and marketing event in that decade. The validity mechanics behind that decade, including what supersedes a certificate early, are worked through in our commercial EPC requirements guide. Residential pricing runs on a different, cheaper market, benchmarked in our residential EPC cost guide.
Why two quotes for the same building can differ by hundreds of pounds
Two quotes for the same building can legitimately differ by hundreds of pounds because the firms have made different assumptions about five things. Understanding them turns a confusing quote into a checkable one.
1. Floor area. The first driver on every price list. More floor area means more zones to measure, more fabric to record and a longer site visit. Published tiers step up at intervals: one list runs £159 for up to 25m², £249 for 51 to 150m², £349 for 251 to 500m² and £550 for 751 to 1,000m², with custom quotes above 1,000m². Area is the honest, visible part of pricing; the other four drivers are where quotes diverge.
2. Building complexity level. Non-domestic energy assessors are qualified in categories, conventionally Levels 3, 4 and 5, matching the complexity of building they may assess. A simple existing shop is Level 3 work; a purpose-built office with more complex services is Level 4; a building with an atrium or complex plant is Level 5. Fewer assessors hold the higher qualifications, so their time costs more. The next section unpacks the levels properly.
3. Assessment method: SBEM or DSM. Most commercial EPCs are produced in software built on SBEM, the Simplified Building Energy Model, which implements the government's National Calculation Methodology. Buildings whose features SBEM cannot model properly need Dynamic Simulation Modelling instead, which implements the same methodology by simulating the building over time, and DSM typically multiplies the fee because the modelling workload is far heavier. This is the single biggest step-change in the price table: the jump from the £400 to £600 band to £1,000-plus is mostly the jump from SBEM to DSM.
4. Building services complexity. Air-conditioning, mixed heating fuels, multiple independently served zones, mezzanines and later extensions all add modelling work even within an SBEM assessment. A plain warehouse with gas blowers is quick; an office of the same size with comfort cooling, electric heating in one wing and gas in another is not. This driver explains why two buildings of identical floor area can be quoted hundreds of pounds apart.
5. Survey logistics. Whether floor plans exist (no plans means the assessor measures the building, at your cost), how easy access is, whether plant rooms are reachable and documented, travel distance, and whether the job is one unit or a batch across an estate. These are the drivers you can actually influence, and the cost-cutting section below shows how.
When a quote surprises you, ask which level and method it assumes and what it includes for plans and access. A cheap headline that silently assumes Level 3, SBEM, drawings supplied and perfect access is not the same product as a dearer quote that has priced your building as it actually is.
Level 3, 4 and 5 assessments, and SBEM vs Dynamic Simulation Modelling
Under regulation 22 of the 2012 Regulations, a commercial EPC can only be produced by an energy assessor who belongs to an accreditation scheme approved by the Secretary of State, and schemes are approved for particular categories of building. The familiar Level 3, 4 and 5 labels are the accreditation schemes' complexity categories built on the government's approved calculation conventions, not terms you will find in the regulations themselves. Government guidance puts it simply: the type of assessor you need depends on the complexity and features of the building.
In practice the categories work like this:
- Level 3: simple existing buildings with straightforward heating and lighting: most shops, small offices, restaurants and basic industrial units. Assessed in SBEM-based software. The cheapest and most competitive part of the market, because most non-domestic assessors are qualified to Level 3.
- Level 4: more complex new and existing buildings: larger offices, buildings with more involved services, new-builds needing compliance-linked assessments. Still SBEM, but fewer qualified assessors and more modelling time.
- Level 5: buildings that SBEM cannot model properly and which need Dynamic Simulation Modelling: atria, large glazed facades, complex heating, ventilation and air-conditioning plant, unusual geometry. The small pool of Level 5 assessors and the heavy modelling workload put these buildings in the £1,000-plus band.
SBEM calculates the building's asset rating from geometry, fabric, zoning and services using standardised assumptions. DSM simulates the building's energy behaviour dynamically over time, which is what glazed facades and complex plant require for a meaningful rating. Both routes implement the same National Calculation Methodology, so neither produces a lesser certificate; they suit different buildings. What tips a building from one to the other is design features, not size: a large but plain distribution shed stays in SBEM, while a much smaller building wrapped in glass with an atrium goes to DSM. If your building has any of the DSM triggers, budget from the bottom of the DSM band and treat any Level 3 priced quote for it with suspicion, because a certificate produced by an assessor not qualified for the building's category is a problem you would only discover when it matters.
What the assessor needs, and how long it takes
You can find an accredited commercial assessor through the government's get an energy certificate service, which routes you to a search of accredited assessors by postcode and property type, or via the accreditation schemes directly. Booking is usually days rather than weeks for Level 3 work; Level 5 availability is thinner. Our guide to booking an EPC walks the process itself.
Before the visit, give the assessor four things: scale floor plans and elevations if they exist, so nobody has to measure the building zone by zone and bill you for it; access to the whole building including plant rooms, roof spaces and tenanted areas, arranged with tenants in advance so the visit is not aborted; services information covering boiler and plant details, heating and cooling by zone, lighting and fuel types and any building management system documentation; and construction details where you have them, build year, wall and roof construction and glazing. Where nothing is known the assessor uses default assumptions, and those defaults are conservative.
The site visit for a small unit takes an hour or two; large multi-zone buildings can take half a day or more. The certificate typically follows within a few days to two weeks, with DSM at the slow end because of the modelling workload. The certificate legally exists once it is entered on the national register, so if you are working to a marketing or completion deadline, confirm the lodgement date in writing rather than the survey date.
Supplying good information does not just speed the job up, it usually improves the rating. A worse band on paper than the building deserves can matter to lettability and to lender questions on a commercial mortgage, entirely apart from the assessment fee.
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How to pay less: batching, floor plans, and timing the 10-year cycle
Certificate pricing rewards preparation. Four levers move the number, and none of them involves choosing a worse assessor.
Check the register first. The EPC attaches to the building, not to you. If a valid certificate was lodged within the last 10 years by a previous owner, a former agent or an earlier marketing round, and no newer one has replaced it, it still serves. Searching the national register costs nothing and takes minutes; commissioning a certificate the building already holds is the most avoidable spend on this page.
Supply floor plans. A measured survey is billable time. Scale plans, even old ones the assessor can verify on site, remove it. For a mid-size unit that difference alone can be the gap between the bottom and top of a price band.
Batch across a portfolio. A portfolio landlord instructing one firm to assess several units in one visit shares the travel, the set-up and often the drawings across the batch, and gives the firm a reason to sharpen the per-unit rate. Consider Fergal, who holds six small industrial units on one estate through his SPV. Booked separately at a typical £249-a-unit list rate, the certificates would cost the company around £1,500. Instructed as a single batch, one assessor, one visit, one set of estate drawings, firms will commonly negotiate a per-unit rate meaningfully below list; even a 15 to 25% batch saving, which is a realistic negotiating range rather than a promise, is £225 to £375 back on one instruction. The saving is illustrative, but the mechanism is not: shared logistics are real cost to the assessor, and quoted work reflects it.
Time renewals against the 10-year cycle and your transactions. Because regulation 9(2) gives each certificate 10 years, renewal dates across a portfolio drift apart. Re-aligning them, by renewing a nearly expired certificate early in the same batch as its neighbours, converts scattered single bookings into batched ones for the following decade. And if a sale or refinancing is planned within a year or two, commission the new certificate ahead of it once, rather than paying for a rushed assessment mid-transaction at whatever the deadline market charges. This is ordinary cashflow planning of the kind your accountant would apply to any recurring compliance cost; the 10-year cycle just makes the planning horizon unusually long.
The VAT question: the hidden 20% on your quote
Assessor fees carry VAT at the standard rate, and almost no price list says whether its figures include it. For many commercial landlords that VAT is not recoverable, which makes it a real 20% uplift, and it means two landlords paying the same quoted fee can bear genuinely different costs.
The mechanics: letting commercial property is an exempt supply for VAT unless the landlord has opted to tax the building. Under an option to tax, rent becomes standard-rated and, as VAT Notice 742A puts it, the landlord can then normally recover the VAT incurred in making those supplies, the assessor's fee included. Without an option, the letting is exempt, and input VAT on costs of making exempt supplies is not recoverable.
Worked through: Ruth inherited a small parade of shops and lets them without an option to tax, as most small commercial landlords do. Her assessor quotes £350 plus VAT. Her true cost is £420, and £420 is the figure that enters her rental accounts. Her competitor across the road runs an opted, VAT-registered portfolio; the same £350 plus VAT quote costs him £350 net, because the £70 comes back as input tax. When Ruth compares quotes, she should compare them VAT-inclusive; when he does, VAT-exclusive. Neither is wrong, but a price list silently quoting net figures reads 20% cheaper to Ruth than it will prove at invoice.
A landlord who is partly exempt, typically with a mixed portfolio where some buildings are opted or the portfolio spans commercial and residential, recovers a proportion of the input VAT under their partial exemption method; our guide to partial exemption for landlords with mixed portfolios covers how that fraction is set. And an owner-occupier trading company using the building for its own taxable business recovers the VAT as a normal overhead, so for owner-occupiers the quoted net price is usually the real one. Whether opting to tax a building is worthwhile is a much bigger decision than one assessor invoice, affecting every future rent and the building's sale; take advice before opting, and never opt merely to recover VAT on compliance costs.
Is the fee tax deductible: investment company, individual landlord, trading business
Here the news is good, and simpler than the VAT position. The EPC fee is a regulatory compliance cost of holding and letting the building, and for a property business it is a revenue expense incurred wholly and exclusively for that business, deductible under the ordinary principles in HMRC's Property Income Manual at PIM2120. The certificate does not improve the building or create an enduring asset; it prices at £150 to £1,500 against rental income the law requires it to support. That analysis holds across ownership structures, with the deduction landing in different computations:
- Individual landlord: deductible against rental profits in the property business computation on the Self Assessment return, relieving tax at your marginal income tax rate.
- Property investment company: deductible against the company's rental profits for corporation tax. For an SPV, the same wholly-and-exclusively logic applies; the fee simply relieves tax at the corporation tax rate instead.
- Owner-occupier trading business: the fee is a trading expense of occupying the premises, deductible in the trading computation, exactly as the building's insurance or repairs would be.
The deduction runs on the cost you actually bear: Ruth, unable to recover her £70 of VAT, deducts the full £420; her opted competitor deducts £350. One boundary to respect: a certificate commissioned solely for the sale of a building is a cost of the disposal, not of the rental business, and belongs in the capital gains computation as an incidental cost of sale rather than against rent. In the common case, a certificate obtained for letting that later happens to serve a sale, the revenue deduction already taken is not disturbed.
Keep the fee distinct from what may follow it. Every EPC comes with a recommendation report, and if you go on to spend on the fabric or plant the report suggests, that spend is analysed on its own terms: repairs are revenue, improvements are capital, and qualifying plant falls into the capital allowances regime, which our guide to capital allowances on commercial property covers. The certificate's £350 and the £35,000 of works it might prompt never share a tax analysis.
Adjacent costs: DECs, penalties and the MEES boundary
Three neighbouring costs get mixed into commercial EPC quotes and searches, and each belongs to a different regime.
Display Energy Certificates. A DEC is priced on a different cycle from an EPC, and that is what matters to a budget: larger public buildings over 1,000m² renew theirs annually rather than once a decade, so the same building carries a recurring assessor fee instead of a one-off one. Assessors price DECs separately from EPCs and often quote them as an annual retainer. Which buildings owe a DEC in the first place, and who in a let building owes it, is set out in our commercial EPC requirements guide.
The cost of not having one. Letting or selling without a valid EPC exposes you to a penalty charge notice under regulation 38 of SI 2012/3118, calculated for a non-dwelling as 12.5% of the building's rateable value, minimum £500, maximum £5,000, with a £750 default where no rateable value can be determined; the enforcement detail sits in our commercial EPC requirements guide. Against the price table above, the arithmetic rarely favours risk-taking.
The rating itself. The market above fixes what the certificate costs; what the certificate says can cost far more, because a band below E triggers works under a separate statutory regime, priced and relieved in our commercial property MEES compliance guide. Our general EPC guide gives the whole framework in one place if you are starting from scratch.
The certificate itself, then, is the cheap part: a known, banded, once-a-decade fee that is deductible and, for opted and trading owners, VAT-neutral. Before you accept any quote, ask the assessor four things: which assessor level and which method they have assumed, whether the price includes a measured survey or assumes you supply plans, whether the figure is quoted net or gross of VAT, and what date the certificate will be lodged on the register. A quote that answers all four is comparable with another quote. A quote that answers none of them is a number, and the gap between the two is where the hundreds of pounds hide.