Do I need a commercial EPC for my business premises?
Quick answer
You need a commercial EPC when you sell the premises, grant a new lease, or the building is newly constructed or undergoes a qualifying refurbishment. If you let commercial space you also need the building to rate at least EPC E. If none of those applies, you may not need one at all.
In almost every case where you are selling, letting or building commercial premises in England or Wales, yes. But "almost every case" is not "every case", and paying for an assessment you do not need is as wasteful as missing one you do.
This page sets out exactly what triggers the requirement, what does not, the situations that catch business owners out, and how to check whether your building already holds a valid certificate before you commission anything.
The three trigger events
A valid non-domestic EPC is required when you sell the premises, when you grant a new lease, and when a building is newly constructed or undergoes a qualifying refurbishment. Those are the events. If none of them is happening, and you are not currently letting, you may not need a certificate at all.
The requirement attaches to the transaction, not to the calendar. There is no annual renewal, no periodic inspection, and no obligation to hold a live certificate simply because you occupy a building you own.
The situation most owners get wrong: continuing to let
If you are a landlord, the picture is different, because MEES adds a separate obligation on top of the EPC requirement. Since 1 April 2023 it has been unlawful to CONTINUE letting a non-domestic property below EPC E. The standard applied to new lettings from 1 April 2018, but the continuing-let rule means an existing tenancy is no longer a shelter.
So a landlord who has not transacted in a decade, and who therefore assumes the EPC rules have never touched them, can still be in breach today. If you let commercial space, you need to know your rating whether or not anything is happening with the lease.
The other one: fit-out and refurbishment
The phrase "qualifying refurbishment" does a lot of work and is easy to walk past. Work that changes a building's fixed services - adding or replacing heating, cooling, ventilation or lighting, or subdividing a space into separately serviced units - can trigger the requirement in its own right, independently of any sale or letting.
This matters most on industrial and logistics fit-outs, where a plain shell is converted for an incoming occupier. It is considerably cheaper to establish the position before the works are specified than to discover it once they are complete and the evidence has to be reconstructed.
Buildings and situations where the position differs
Some buildings sit outside the standard requirement or are treated differently. Places of worship, certain temporary buildings with a short intended lifespan, stand-alone buildings under a small floor area, and some industrial sites, workshops and non-residential agricultural buildings with low energy demand can fall outside it.
Listed buildings are the most misunderstood category. Listing does not automatically remove the requirement. Where compliance with minimum energy performance requirements would unacceptably alter the character or appearance of the building, the position can differ - but that is a judgement to be established properly for the specific building, with evidence, rather than assumed because the building is old.
If you think your premises might fall outside the requirement, get that confirmed rather than concluded. An assumption is not a defence.
Check whether you already have one
Before commissioning an assessment, check the register. Non-domestic EPCs are lodged on the national non-domestic register and can be looked up against the property, so a certificate produced at a previous sale may still be live.
Two things to verify. First, the lodgement date: the 10-year validity runs from lodgement, not from the transaction it was produced for. Second, the extent - a certificate covering a different demise, or a building that has since been subdivided or materially altered, may be valid on paper and useless in practice.
Who can produce one, and why that matters
A legally valid non-domestic EPC must be produced by an accredited non-domestic energy assessor working under a recognised scheme - Elmhurst, Stroma-NAPIT, Quidos and ECMK among them - and lodged on the register. It requires a site inspection: the assessor has to record the fabric, the fixed services and the zoning that the calculation depends on.
This is why a cheap certificate produced remotely from a questionnaire is a false economy. It is not simply lower quality - if it was not produced properly by an accredited assessor, it is not a valid certificate, and it is not something you want underpinning a lease or a sale that has to complete.
What it will cost, roughly
A commercial EPC is priced on the building rather than from a menu. A small single-zone shop or office suite assessed at SBEM Level 3 typically runs from around GBP 120 to a few hundred pounds. Larger multi-zone buildings assessed at Level 4, and the most complex buildings modelled at Level 5, cost more - often several hundred to over a thousand pounds - because every heating and cooling system and every zone has to be surveyed and modelled.
Full detail, including what moves the fee and how to keep it down, is on our commercial EPC cost page.
What happens if you proceed without one
Practically, transactions stall. A buyer or tenant solicitor will require a valid EPC before completion, so the absence of one is usually discovered at the worst possible moment - late, with a deadline, and with no time to improve anything the certificate reveals.
Legally, failing to have or produce an EPC when required attracts a penalty of GBP 500 to GBP 5,000. If you are letting, MEES sits on top of that: letting below EPC E carries penalties tiered on rateable value reaching up to GBP 150,000, together with publication of the breach.
When to commission it
Earlier than feels necessary. The assessment itself is not slow, but the certificate can tell you something you need months rather than days to act on. Discovering an F-rating at the point of exchange leaves no options; discovering it before marketing leaves room to improve the building or to prepare an exemption case properly.
If a refurbishment or fit-out is planned, get the position established before the works are specified. Where an assessment is going to be needed anyway, designing to it costs almost nothing and retrofitting evidence to it costs a great deal.