MEES Explained: Minimum Energy Efficiency Standards

The current requirement for non-domestic private rented property in England and Wales is a minimum EPC rating of E. This applies to continuing lettings, not only to new lettings, so a landlord holding a sub-E property under an existing lease is already exposed rather than merely facing a problem at renewal. Enforcement sits with local authorities, and penalties are calculated by reference to rateable value.

A 2026 change tightened the evidence side: a valid EPC must now be in place at the point a property is marketed for sale or let, removing the previous grace period that allowed one to follow shortly afterwards. In practice that moves the assessment earlier in the transaction and makes an expired certificate a live obstacle rather than an administrative catch-up.

MEES is not an absolute prohibition. Exemptions exist where relevant improvements would not meet a cost-effectiveness test, where a third party withholds necessary consent, or where the improvement would devalue the property, among others. Exemptions must be registered on the PRS Exemptions Register and are time-limited rather than permanent, so they need active management rather than filing and forgetting.

The practical burden is evidential. Claiming an exemption means holding the assessment that supports it — the recommendation report, the quotes or payback calculation, the refused consent — and being able to produce it. That documentation is exactly the kind that gets created by a consultant during a transaction and then disappears into a project folder. Where a portfolio carries multiple exemptions with different expiry dates, keeping the underlying evidence findable is the difference between a defensible position and an unprovable one.