Business Energy Glossary
What are MEES (Minimum Energy Efficiency Standards)?
MEES, the Minimum Energy Efficiency Standards, are UK regulations restricting the letting of commercial and domestic property with low Energy Performance Certificate (EPC) ratings. Since 1 April 2023, commercial landlords cannot let buildings rated F or G unless a registered exemption applies. The UK government has consulted on tightening MEES further: a proposed minimum rating of C by 2027 and B by 2030, subject to consultation outcomes. Non-compliance penalties range from £10,000 to £150,000 depending on the rateable value of the building.
MEES has been one of the most significant drivers of commercial property energy upgrades in the UK. Property investors, landlords, and tenants need to understand current and proposed MEES requirements when assessing buildings, planning capex, and negotiating leases.
On this page
Current MEES requirements
For commercial property in England and Wales:
- Since 1 April 2018. Cannot grant new leases on F or G rated buildings.
- Since 1 April 2023. Cannot continue to let F or G rated buildings (existing lets must be upgraded or qualify for exemption).
For domestic property:
- Since 1 April 2018. Cannot grant new tenancies on F or G rated properties.
- Since 1 April 2020. Cannot continue to let F or G rated properties.
The regulations apply in England and Wales. Scotland and Northern Ireland have separate energy efficiency regulations.
Proposed MEES tightening
The UK government has consulted on tightening MEES for commercial property:
- Proposed 2027. Minimum rating tightening to C for all commercial lets.
- Proposed 2030. Minimum rating tightening to B.
- Implementation is subject to consultation outcomes and parliamentary process; dates and rating levels may change.
For context, around 60 per cent of UK commercial property is currently rated D or below. The proposed tightening would require substantial capital investment across the property sector to comply.
Who MEES applies to
MEES applies to:
- Landlords of commercial property. Including offices, retail, industrial, warehouses, and mixed-use.
- Landlords of domestic property. For private rented sector (PRS) properties.
- New tenancies and continued lets. Both transaction triggers are covered.
MEES does not apply to:
- Owner-occupied buildings (no lease).
- Properties without a valid EPC requirement (some exempt categories).
- Short-term lets under six months.
- Lets in Scotland and Northern Ireland (separate regulations apply).
MEES exemptions
Six main exemption categories for commercial property:
- Seven-year payback exemption. Improvements are not cost-effective (do not pay back within seven years through energy savings).
- All improvements made. All relevant improvements have been made and the building still falls below the threshold.
- Third-party consent. Required consent (tenant, planning, freeholder) has been withheld.
- Devaluation. Improvements would cause more than 5 per cent reduction in property value.
- New landlord. Temporary six-month exemption for newly acquired property to allow time to comply.
- Wall insulation. Specific exemption where wall insulation would damage the building.
All exemptions must be registered on the central PRS Exemptions Register with supporting evidence. Exemptions last five years and must be re-registered if circumstances persist.
Non-compliance penalties
Local authorities (Trading Standards) enforce MEES with penalties scaled to rateable value:
| Rateable value | Minimum penalty | Maximum penalty |
|---|---|---|
| Under £50,000 | £5,000 | £50,000 |
| £50,000 to £250,000 | £10,000 | £100,000 |
| £250,000 and above | £10,000 | £150,000 |
Additional penalty for false or misleading exemption registration: up to £5,000. The penalty applies per breach (per lease), so a portfolio non-compliance can attract substantial total penalties.
Preparing for tighter MEES
Practical steps for commercial property investors and landlords:
- Portfolio EPC audit. Identify all buildings, current ratings, and validity dates.
- Improvement assessment. For lower-rated buildings, model the impact of typical improvements on the rating.
- Capital planning. Build improvement budgets into property capex plans aligned to the proposed 2027 and 2030 dates.
- Lease structure. Consider green leases that share improvement costs and benefits between landlord and tenant.
- Disposal strategy. For buildings where improvement is uneconomic, plan for disposal before MEES tightening.
The five-to-seven-year window between now and tightened MEES is short for major fabric, plant, and renewable installations across a property portfolio. Early planning is essential.
MEES (Minimum Energy Efficiency Standards) FAQs
What are MEES?
Minimum Energy Efficiency Standards. UK regulations restricting the letting of commercial and domestic property with low Energy Performance Certificate ratings. Since April 2023, commercial landlords cannot let buildings rated F or G unless an exemption applies.
What is the current MEES rating threshold?
E. Commercial landlords cannot let F or G rated buildings since April 2023 (since April 2018 for new lets and April 2023 for continued lets).
What MEES changes are proposed?
The UK government has consulted on tightening MEES to C by 2027 and B by 2030 for commercial lets. Implementation is subject to consultation outcomes and parliamentary process.
Who does MEES apply to?
Landlords of commercial and domestic property in England and Wales. Both new tenancies and continued lets are covered. Owner-occupied buildings, short lets under six months, and Scotland/Northern Ireland properties have different rules.
What exemptions exist?
Six main commercial exemptions: seven-year payback, all relevant improvements made, third-party consent withheld, devaluation, temporary new landlord, and wall insulation. All must be registered on the central PRS Exemptions Register.
What are MEES non-compliance penalties?
Scaled to rateable value: £5,000 to £50,000 for properties under £50,000 RV; £10,000 to £100,000 for £50,000-£250,000 RV; £10,000 to £150,000 for £250,000+ RV. Additional penalties for false exemption registration.
How do I check my MEES position?
Audit your portfolio EPC ratings (validity, score, recommended improvements). Lower-rated buildings should be assessed for improvement cost and impact on rating. The Property Investor MEES checklist from the government provides a structured approach.
What if MEES improvements are uneconomic?
Register the seven-year payback exemption with supporting evidence. The exemption must be renewed every five years. If improvements are persistently uneconomic, the property may need to be sold or repurposed.