Retail, Shops & Units: commercial EPC assessment

Shop EPCs: when you need one

A shop EPC is a legal requirement whenever you sell, let or relet a retail unit in England or Wales, and retail is one of the highest-churn categories for exactly that reason — EPCs are triggered constantly by tenant changes, void reinstatement and relets across a parade of units. The certificate rates the unit from A to G on its modelled energy performance and lists the improvements that would raise the score. A buyer’s or incoming tenant’s solicitor will require it before completion, so a missing or expired certificate stops you putting the unit back on the market rather than merely slowing it.

The triggers are the familiar three. A sale of the unit. A new or renewed letting, including reletting a void after a tenant leaves, which is where most retail EPCs arise. And construction or a qualifying refurbishment that alters the heating, cooling or ventilation, where the EPC evidences compliance with Building Regulations Part L. A shop EPC is valid for ten years from lodgement, so one current certificate can cover more than one relet inside that window — but you need an in-date one at the point of each letting, and in a competitive parade a stale or missing certificate is the difference between reletting in days and leaving a unit standing empty.

If you own and trade from your own shop and are not selling or letting, you may not need a certificate right now. The moment a lease event or a sale arrives, you do — and for landlords holding several units, having current certificates ready is what keeps voids short.

What drives a shop’s EPC rating

Retail units have an energy profile all their own, and it is often an unforgiving one. The Simplified Building Energy Model assesses each of the following.

• The shopfront and glazing. Large single-glazed shopfronts and, worse, open or frequently-open frontages are a defining retail weak point — they lose a great deal of heat, which the model captures. This is a big part of why shops so often sit at E, F or G.
• Heating. Older retail units frequently run on electric heating (panel heaters, warm-air units or over-door heaters), which scores poorly against the model’s carbon weighting. Gas heating with dated controls is the other common profile.
• Lighting. Retail lighting is intensive — display and general lighting together are a large share of a shop’s regulated energy — and older halogen, fluorescent or metal-halide lighting drags the rating down. It is also the cheapest thing to fix.
• Ventilation and any cooling. A simple shop may have little more than extract ventilation; a food unit or a larger store with air conditioning carries more load.
• Fabric. Wall and roof insulation matter, though in a mid-terrace high-street unit the shopfront and services usually dominate the result.

The pattern is that a modern, well-fitted unit scores reasonably, while the older high-street stock — open shopfronts, single glazing, electric heating and old lighting — is exactly the profile that produces the E, F and G ratings landlords dread.

Assessment level and what it costs

A shop EPC is priced on the building, not from a fixed menu, but the good news for retail is that a single, simple unit is usually the least complex commercial assessment there is.

• SBEM Level 3 covers a single, straightforward shop or café — one zone, simple heating, no significant mechanical cooling, broadly under 250 square metres. This is the standard retail assessment and the quicker, lower-cost one.
• SBEM Level 4 applies where a unit is larger, has multiple zones, or carries more involved services such as significant air conditioning or mechanical ventilation — a larger store or a food unit with a commercial kitchen, for instance.

Both use the same government calculation engine; the level is set by the unit, not chosen to inflate the fee. The most complex retail buildings could in principle need a Level 5 Dynamic Simulation Modelling (DSM) assessment, but that is rare for ordinary shops — and worth noting, because the point is muddled online: DSM is Level 5, and a Level 4 assessment is still SBEM. Our guide to SBEM Level 3 vs Level 4 vs DSM explains it.

For a single retail unit the indicative range is £120 to £450 plus VAT, most simple shops sitting at the lower end on a Level 3 assessment. The fee is driven by floor area, the number of heating and cooling systems, the number of zones and site access. Our commercial EPC cost guide sets out the ranges, and a firm price follows once the basics of the unit are known.

For a landlord assessing several units at once, per-unit pricing is usually more efficient booked together, because the assessor can survey a parade in a single visit rather than mobilising separately for each shop. It is also worth being wary of a very cheap, no-visit flat rate advertised for retail EPCs. A simple shop is genuinely a low-cost assessment, but even a single unit needs its fabric, heating and lighting looked at to model the rating accurately — and a remote guess that comes back a band too low can strand a lettable unit on the wrong side of the E line, while one a band too high can be challenged when a tenant’s solicitor checks the register. On a relet where a few days of void matters, a rating you can rely on the first time is the cheaper outcome.

MEES and your shop

The Minimum Energy Efficiency Standard is what turns a poor shop EPC from a piece of paper into a trading problem. The current minimum to let non-domestic space is EPC E, and since 1 April 2023 it has been unlawful to continue letting a unit rated below E, not just to grant a new lease. For retail that bites hardest at the relet: a shop below EPC E cannot lawfully be relet without registering a valid exemption on the PRS Exemptions Register, so an F or G unit simply will not go back on the market until it is either improved or formally exempted. In a parade of units, that is the difference between an asset and a liability.

The penalties are serious. Non-domestic MEES breaches are tiered on rateable value and the length of the breach, up to a maximum of £150,000 per property, and non-compliant landlords can be named publicly. Separately, failing to have or provide a valid EPC when required on a sale or let carries its own penalty of £500 to £5,000.

For most retail units the tightening rules are a smaller concern than the E line itself, because the majority of shops fall well under the 1,000 square metre threshold. For completeness: 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, with the interim EPC C milestone for 2027 dropped. A large retail warehouse or department store is caught by that; a standard high-street unit is not, and stays on the EPC E minimum. Our guide to EPC B by 2031 and commercial MEES covers where the line falls, and the government’s non-domestic MEES landlord guidance{rel=“noopener”} sets out the current rules.

Improving a shop’s rating

For retail, the EPC report usually points to a short, cheap route back over the E line — which is why lighting and heating upgrades are the improvements a shop assessment most often recommends. Where a unit comes back F or G, the realistic order is typically this.

• LED lighting with controls. Because retail lighting is so intensive, replacing halogen, fluorescent or metal-halide lamps with LED — and adding controls — is the highest-value, lowest-cost measure, and in a marginal unit it can lift the rating on its own.
• Heating upgrade or replacement. Swapping old, carbon-heavy electric heating for a more efficient system, or upgrading dated gas heating and its controls, is the other big lever for the classic F/G shop.
• Heating and time controls. Programmable controls stop the unit heating out of trading hours for a small spend.
• Draught-proofing and shopfront measures. Addressing an open or leaky shopfront reduces the heat loss the model penalises, though a full shopfront replacement is a larger capital call usually reserved for a wider refit.

For most F/G high-street units, a combination of LED lighting and a heating upgrade is enough to reach a solid, lettable E — turning an unlettable unit back into an asset without a major programme. Where a longer lease or a stronger tenant justifies it, the report shows the further measures that push the rating higher.

Shop EPC — common questions

Our retail unit came back F — can we still relet it? Not lawfully, unless you register a valid exemption on the PRS Exemptions Register — in practice the unit is unlettable until improved. The better news is that the EPC report lists the fixes, and for most F/G shops the quick wins (LED lighting with controls and a heating upgrade) are enough to lift the unit to a solid E and restore the legal right to relet. Registering an exemption is a backstop for genuinely unimprovable units, not the first move.

Whose responsibility is the shop EPC on a new letting — landlord or tenant? The obligation to have a valid EPC available for a new letting rests with the party granting the lease — the landlord, on a relet of a void unit. In practice the landlord commissions and pays for it as part of getting the unit market-ready. A tenant carrying out works that trigger a new certificate (for example a fit-out that changes the heating or cooling) may need one for those works, but the letting EPC is the landlord’s to provide.

Does a change of tenant always need a new EPC? Not if there is already a valid, in-date certificate for the unit — an EPC lasts ten years and covers more than one letting inside that window. You need a new one if the existing certificate has expired, if you cannot find it (treat it as expired), or if works since the last assessment have changed the unit’s fabric or services enough to warrant a fresh rating. Reletting is also a natural moment to recertify if an old E is uncomfortably close to the line.

We run a small café rather than a shop — is the EPC the same? Broadly yes for a small, simple café: it is usually a single-zone Level 3 SBEM assessment like a shop. The difference is the kitchen — a café with significant cooking, extract ventilation and hot-water load carries more services to model, which can push a larger unit to a Level 4 assessment. For a full picture of food-and-drink premises, our hospitality EPC page covers pubs, restaurants and hotels.

How quickly can we get a shop EPC? For a straightforward single unit, an assessment can often be surveyed and lodged within a few working days, sometimes faster where access is easy — which suits the fast turnaround a relet usually needs. A larger store or a food unit on a Level 4 assessment takes longer. Booking as soon as a unit falls void, rather than once a tenant is lined up, is the way to keep the void short.

Should we just register an exemption instead of upgrading an F or G unit? Only as a genuine last resort. The PRS Exemptions Register is a backstop for units that genuinely cannot be improved to the E minimum cost-effectively — for example where all the relevant measures have been done and the unit is still sub-E, or where required third-party consent is refused — not a planning strategy to avoid the work. Exemptions must be evidenced and are time-limited, typically five years, after which you have to try again. For most F/G high-street units the improvements the EPC recommends are cheaper and lower-risk than relying on repeated exemptions, so the recommendation report is usually the better route back to a lettable unit.

Get a commercial EPC for your shop

Tell us the basics — floor area, the type of unit, the heating and lighting, and whether it is for a sale or a relet — and an accredited NDEA (Elmhurst, Stroma-NAPIT, Quidos or ECMK) will confirm the assessment level and a fixed price. To get an accurate, no-obligation figure for your unit, or for several units across a parade, request a free commercial EPC quote and we will price it on the unit in front of us, not a menu.