Commercial EPCs & MEES: The Minimum Energy Rating Landlords Need

For commercial landlords, an Energy Performance Certificate is not just paperwork — it can determine whether you are legally allowed to let the property at all. The Minimum Energy Efficiency Standards, or MEES, set a floor on how energy-efficient a rented commercial building must be. With the rules tightening over the coming years, it pays to understand where you stand now and what is coming. This guide explains the current requirement, the confirmed changes ahead, and how to improve a rating.

What is MEES?

MEES makes it unlawful to let a commercial property in England and Wales that falls below a minimum EPC rating, unless a valid exemption is registered. It applies to the granting and continuation of tenancies, and enforcement sits with local authorities, who can impose financial penalties for non-compliance.

The current minimum: EPC E

Since 1 April 2023, the standard has applied to all privately rented commercial properties on an ongoing basis: a building with an EPC rating of F or G cannot lawfully be let without an exemption. In practice, EPC E is the current minimum you need to continue letting commercial space.

What's changing: EPC B by 2031

The direction of travel is stricter. In its 2026 response on non-domestic MEES, the Government confirmed that privately rented commercial buildings over 1,000 square metres will need to reach EPC B by 2031 — a one-year extension from the previously proposed 2030 deadline — where this is cost-effective. An earlier proposal for an interim EPC C milestone by 2027 will not be taken forward. Owner-occupied buildings remain outside the scope of MEES, and the detailed secondary legislation and guidance are still to be finalised, so landlords should watch for confirmation of the final requirements.

Exemptions

Where improvements are not possible or not cost-effective, certain exemptions can be registered on the national PRS Exemptions Register — for example where all cost-effective improvements have been made but the target still is not met, subject to tests such as the seven-year payback rule. Exemptions are time-limited and must be properly evidenced.

How to improve a commercial EPC rating

Improving a rating is usually a combination of measures, and lighting is one of the most cost-effective:

• Upgrading to energy-efficient LED lighting with modern controls, which cuts consumption and often improves the rating quickly.

• Improving heating efficiency and controls, including zoning and smarter time and temperature control.

• Adding insulation and reducing heat loss where the building fabric allows.

• Reviewing hot water, ventilation and building management to remove obvious waste.

EPC assessments and energy upgrades in Manchester

Kilmal helps commercial landlords across Manchester and the North West improve their ratings — from energy-efficient LED lighting upgrades that deliver quick wins, through to EPC assessments that show exactly where you stand and what to prioritise before the next deadline.

Frequently asked questions

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

Currently EPC E. Since April 2023 it has been unlawful to let a commercial property rated F or G in England and Wales without a valid registered exemption.

When does the EPC B requirement apply?

The Government has confirmed that privately rented commercial buildings over 1,000 square metres will need to reach EPC B by 2031, where cost-effective. The detailed legislation is still to be finalised.

Does MEES apply to owner-occupied buildings?

No. MEES applies to let commercial property. Owner-occupied buildings are outside its scope, though improving efficiency still reduces running costs.

How can I improve my commercial EPC rating?

Common, cost-effective measures include upgrading to LED lighting with controls, improving heating efficiency and controls, adding insulation, and cutting obvious energy waste. An assessment shows which will move your rating most.

What happens if I let a sub-standard property?

Letting below the minimum standard without a registered exemption is unlawful and local authorities can impose financial penalties, so it is important to act before a tenancy is granted or continued.

Improving a rating before the deadline? Kilmal fits energy-efficient LED lighting upgrades.