What EPC rating do you need to let a commercial property?

Currently at least an EPC rating of Band E in England and Wales, unless a valid exemption is registered. The previously proposed 2027 Band C milestone was dropped in 2026; the long-term target is EPC B for large non-domestic buildings (over 1,000 m²), expected around 2031.

Is Band C by 2027 still the commercial deadline?

No, the 2027 EPC Band C step for commercial property was dropped in the government's June 2026 interim response. The minimum to let stays Band E, with EPC B the long-term goal (around 2031) for non-domestic buildings over 1,000 m².

Does solar improve a building's energy rating?

Yes, on-site solar reduces a building's assessed energy use and carbon intensity, which can raise its EPC rating, especially for large low-rise buildings.

What happens if a building is below the MEES minimum?

It generally can't be lawfully let until improved or a valid exemption is registered, which can mean lost rent and reduced value.

MEES and commercial EPC rules: what landlords must hit, explained

MEES sets the minimum EPC rating a commercial property needs to be let. The floor is currently Band E. The government's June 2026 interim response DROPPED the previously proposed 2027 Band C milestone; the long-term target is EPC Band B for large non-domestic buildings (over 1,000 m²), now expected around 2031. Solar is one of the fastest ways to lift a building's EPC band and future-proof it.

What is MEES?

The Minimum Energy Efficiency Standards (MEES) make it unlawful to let a non-domestic property in England and Wales below a minimum EPC rating, unless a valid exemption is registered. Since April 2023 the standard of Band E applies to all continuing commercial leases, not just new ones.

Is 'Band C by 2027' still happening?

No. The government's June 2026 interim response on non-domestic MEES dropped the previously proposed 2027 EPC Band C milestone. The current minimum to let remains Band E, and smaller buildings have no set deadline beyond that. This is separate from the residential (domestic private-rented) EPC C proposals, don't conflate the two.

What is the long-term target?

The government's long-term goal is EPC Band B, now expected around 2031, and only for larger non-domestic buildings, those over 1,000 m² of floor area. That threshold captures most warehouses, distribution centres and retail sheds, so owners of large commercial roofs have a clear direction of travel to plan for, on a 2031 horizon, not a near-term deadline.

How does solar improve a building's rating?

On-site generation reduces a building's assessed energy use and carbon intensity, which can lift its EPC rating. For large, low-rise buildings like warehouses, a rooftop PV system can be one of the most cost-effective single measures, and it pays for itself through avoided electricity costs, typically in about 4–9 years.

Which buildings are most at risk?

Older industrial units, warehouses and retail sheds frequently sit at Band D–G today. Sunseam flags every roof's EPC rating and MEES status, so you can see at a glance which large buildings are furthest from the EPC B target and have the strongest reason to act.