1. What are the MEES regulations?
The Minimum Energy Efficiency Standards (MEES) regulations set the minimum Energy Performance Certificate (EPC) rating required to let commercial property in England and Wales. If your property doesn’t meet the minimum standard, you cannot legally:
- Grant a new lease
- Renew an existing lease
- Continue an existing lease (since April 2023)
This isn’t advisory guidance or best practice — it’s law, with enforcement powers and significant penalties.
2. Current and future standards
The regulations are tightening in phases:
| Date | Minimum EPC Rating | Status |
|---|---|---|
| Now (since April 2023) | E | In force — applies to all lettings including existing leases |
| 2027 (proposed) | C | Expected — will affect most commercial stock |
| 2030 (proposed) | B | Expected — will require significant improvements for many buildings |
The trajectory is clear: minimum standards are rising, and they’re rising quickly. Properties that scrape an E rating today will need substantial improvement to meet the 2027 standard, and further improvement by 2030.
3. Why this matters to you
Legal compliance
You cannot legally let a non-compliant property. This applies now, to all tenancies — not just new leases. If your property is rated F or G today, you’re already in breach unless you have a registered exemption.
Enforcement and penalties
Local authorities enforce MEES regulations. Penalties include:
- Up to £5,000 for letting a non-compliant property for less than 3 months
- Up to £10,000 for letting for 3 months or more
- Up to £150,000 for providing false or misleading information
- Publication on a public register (reputational damage)
These are per-property penalties. A portfolio of non-compliant properties multiplies exposure.
Lettability
Beyond legal compliance, tenants increasingly consider energy costs and sustainability when choosing premises. A poor EPC rating affects marketability, tenant quality, and achievable rent.
Asset value
Properties with poor energy performance are increasingly discounted in valuations. Investors and lenders scrutinise EPC ratings. Non-compliance affects not just income but capital value.
4. Understanding EPC ratings
EPC ratings run from A (most efficient) to G (least efficient), based on the building’s energy use per square metre. The rating considers:
- Fabric efficiency — insulation, glazing, airtightness
- Heating systems — boiler efficiency, controls, distribution
- Lighting — efficiency, controls
- Renewable energy — solar panels, heat pumps, etc.
- Air conditioning — efficiency of cooling systems
Each building is assessed against a notional reference building. The rating reflects how the actual building compares to this benchmark.
Importantly, EPC ratings are based on the building’s intrinsic characteristics, not how it’s actually used. Occupant behaviour doesn’t affect the rating.
5. What to do now
Check your current ratings
Review the EPC ratings for every property in your portfolio. Identify:
- Properties rated F or G (non-compliant now)
- Properties rated E (compliant today, non-compliant from 2027)
- Properties rated C (compliant until 2030)
Assess improvement options
For properties that need upgrading, understand what improvements would achieve the required rating. This isn’t guesswork — it requires professional energy assessment to model different improvement scenarios.
Common improvement measures include:
- Insulation upgrades (walls, roof, floor)
- Heating system improvements or replacement
- Lighting upgrades (LED, controls)
- Glazing improvements
- Building management systems
- Renewable energy installations
Plan and budget
Improvement works take time and money. Build them into your business planning:
- Capital budgets for improvement works
- Timing aligned with lease events, refurbishments, or maintenance cycles
- Cash flow planning for phased improvements
Consider exemptions
Not every property can achieve compliance cost-effectively. The regulations include exemptions for specific circumstances (see below). If an exemption applies, it buys time — but it’s not a permanent solution.
6. Available exemptions
Several exemptions exist, each with specific requirements:
7-year payback exemption
If improvements that would achieve compliance wouldn’t pay back within 7 years through energy savings, you may register an exemption. You must still carry out all improvements that do meet the 7-year payback test.
Consent exemptions
If you can’t get necessary consents — planning permission for external insulation, listed building consent, tenant consent for disruptive works — an exemption may apply.
Devaluation exemption
If an independent surveyor determines that improvements would reduce the property’s market value by more than 5%, you may qualify for an exemption.
New landlord exemption
If you’ve recently acquired a non-compliant property, you have a 6-month exemption period to make improvements or register another exemption.
Important points about exemptions:
- Exemptions must be registered on the PRS Exemptions Register
- They last 5 years maximum, then must be renewed or superseded by compliance
- They’re personal to the landlord — they don’t transfer on sale
- They’re not permanent solutions — you need a long-term compliance strategy
7. The cost of doing nothing
Some landlords are taking a wait-and-see approach. This is risky:
Penalties accumulate — every day of non-compliance is potential enforcement exposure.
Works become more expensive — as deadlines approach, contractors become busier and more expensive. Planning and phasing improve value.
Market position weakens — compliant properties command better tenants and rents. Non-compliant properties become harder to let.
Asset values fall — buyers and valuers are increasingly pricing in MEES compliance costs and risks.
Financing becomes harder — lenders are increasingly cautious about non-compliant properties, affecting refinancing and acquisition finance.
8. Getting from E to C (and beyond)
Moving from an E rating to C typically requires meaningful intervention. Common scenarios:
Older buildings with poor fabric
May need insulation (cavity wall, external cladding, internal lining), roof insulation, and glazing improvements. Costs can be significant but improvements are permanent.
Buildings with inefficient heating
Upgrading from old gas boilers to modern condensing boilers, or to heat pumps, can substantially improve ratings. Adding proper controls helps further.
Buildings with poor lighting
LED upgrades and lighting controls are relatively inexpensive and can make a meaningful difference to ratings.
Combination approaches
Usually, achieving C or B requires a combination of measures. Professional assessment identifies the most cost-effective mix.
Key Takeaways
- Current minimum is E — F and G rated properties are already non-compliant
- Minimum rises to C in 2027 and B in 2030 — plan ahead
- Penalties are significant — up to £150,000 per property plus reputational damage
- Exemptions exist but are temporary (5 years) and must be registered
- Improvement planning takes time — don’t wait until deadlines are imminent
- Professional assessment is essential — understand exactly what your properties need
Need Help?
Working with our energy assessment partners Carbon Profile, we provide a complete MEES compliance service: assessment of what’s needed, specification of improvement works, and managed delivery to achieve the rating you need.
Related Services:
- MEES Compliance & EPC Improvement Works — Assessment and managed improvement works
- Pre-Acquisition Surveys — Factor EPC compliance into acquisition decisions
- Contract Administration — Managing improvement works delivery
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