What are the EPC and MEES rules for commercial property?
An Energy Performance Certificate (EPC) rates a building's energy efficiency from A, the most efficient, to G, the least. The Minimum Energy Efficiency Standards, known as MEES, make it unlawful in England and Wales to let commercial property that falls below a minimum EPC rating unless a valid exemption is registered. The current minimum is an E. In short, if your commercial property is rated F or G, you generally cannot lawfully let it, and that has real consequences for value, income and borrowing.
MEES has applied to new lettings of sub-standard commercial property since April 2018, and since April 2023 it has extended to all existing commercial lettings, meaning a continuing lease of an F or G rated building can also breach the rules. Scotland and Northern Ireland operate their own separate energy assessment regimes, so the detail below focuses on England and Wales.
What EPC rating do you need to let commercial property now?
At present you need at least an E to let commercial property lawfully in England and Wales, absent a registered exemption. That means F and G rated buildings are, for letting purposes, sub-standard. A landlord who lets or continues to let such a property without a valid exemption can face enforcement action and financial penalties from the local authority.
Importantly, the E minimum applies to letting. It does not force an owner-occupier to upgrade a building they trade from themselves, and it does not by itself prevent a sale. But the moment a property is let, or is bought as an investment to be let, the rating becomes central.
Is the commercial EPC minimum going up to C and B?
This is where landlords and buyers most need to pay attention. The government has proposed raising the minimum commercial EPC over time: an expected uplift to a minimum of C by around 2027 and a further rise to a minimum of B by around 2030. These are proposals and expected directions of travel rather than settled, final law. The precise thresholds, dates and mechanics have been subject to consultation and may change.
The sensible way to plan is to treat the tightening as likely but not fixed. A building comfortably rated C or above today looks well placed. A building sitting at E, which is compliant now, could become sub-standard if the minimum rises, potentially stranding the asset for letting until it is improved. That risk is why energy performance has moved from a compliance footnote to a core investment and financing question.
What exemptions apply under MEES?
MEES includes a framework of exemptions, which must be registered on the national PRS Exemptions Register and are generally time-limited, typically lasting up to five years. Common categories include:
- All relevant improvements made: where the landlord has carried out all improvements that meet the cost-effectiveness test and the property is still below the minimum.
- Seven-year payback: where the energy-saving measures would not pay for themselves through energy savings within a defined period.
- Consent or devaluation: where a required third-party consent, such as from a tenant or planning authority, cannot be obtained, or where works would devalue the property by more than a set threshold.
Exemptions are not a permanent way around the standard. They buy time, and they must be properly evidenced and registered. Relying on an exemption is weaker, from both a value and a lending perspective, than simply holding a compliant building.
How does EPC affect commercial property value and lending?
Energy performance now feeds directly into value. A property that cannot lawfully be let, or that faces expensive works to reach a future minimum, is worth less than an equivalent compliant building, because the income is at risk and the buyer inherits the upgrade bill. This shows up in yields, rents and the pool of buyers willing to bid.
For lending, the effect is twofold. First, valuation: a lender lends against value, and a sub-standard or at-risk EPC can reduce the valuation and therefore the loan, as covered in our guide to commercial investment property finance. Second, criteria: a growing number of lenders now consider energy performance directly, and some are more cautious about, or price differently for, non-compliant or hard-to-improve stock. For investment deals the risk of a void, if a building cannot be re-let, also weakens the rental cover that underpins the debt.
What should landlords and buyers do?
- Check the actual EPC and its expiry, not the assumed rating, before buying or refinancing.
- Budget for improvement works where the rating is at or near the minimum, especially given the expected uplift to C and then B.
- Price the risk into the deal: a low rating is a negotiating point on purchase price.
- Register any exemption properly if you are relying on one, and treat it as temporary.
- Consider improvement finance where upgrading unlocks lettability and value, which can be built into a refinance.
Where energy works are needed to make a building lettable or to lift its rating, that spend can often be planned around a refinance, as explained in our guide to refinancing a commercial mortgage on better terms. Improving an asset from sub-standard to compliant can raise both its value and its appeal to lenders.
Funding a compliant or improvable commercial property
Because lenders increasingly weigh energy performance, presenting the EPC position clearly, alongside any improvement plan, strengthens a case. Assesr builds a lender-ready credit paper in around 60 seconds and matches your commercial mortgage to specialist lenders whose criteria fit your asset and its rating, at a quarter of the typical broker fee. You pay the 0.5% Assesr Fee on drawdown, and it is free to submit, with nothing to pay until your deal completes.
Frequently asked questions
What is the minimum EPC rating to let commercial property?
In England and Wales it is currently E. Under the Minimum Energy Efficiency Standards, it has generally been unlawful to grant a new commercial lease, and since April 2023 to continue letting, a property rated F or G unless a valid exemption is registered.
Is the commercial EPC minimum rising to C and B?
The government has proposed raising the minimum commercial EPC to C by around 2027 and B by around 2030, but these are proposals rather than settled law, and the timing and detail may change. Landlords should plan on the basis that standards are expected to tighten.
How does a poor EPC affect a commercial mortgage?
A low or sub-standard EPC can reduce the property's value and lettability, which feeds directly into the loan a lender will offer. Some lenders now factor energy performance into their criteria, and non-compliant stock can be harder to fund.