MEES Regulations: Achieve EPC Band B with Solar

The Minimum Energy Efficiency Standards require commercial properties to reach EPC Band C by 2027 and Band B by 2030. Solar panels are the single most effective measure for improving your EPC rating and avoiding penalties of up to £150,000.

Understanding MEES Regulations for Commercial Properties

The Minimum Energy Efficiency Standards (MEES) represent one of the most significant regulatory changes affecting commercial property in the United Kingdom. Introduced under the Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015, MEES set a minimum Energy Performance Certificate (EPC) rating that commercial properties must achieve in order to be legally let to tenants.

Since April 2023, it has been unlawful to continue to let a commercial property with an EPC rating below E, regardless of whether the lease is new or existing. The government has signalled its intention to raise these minimum standards significantly over the coming years, with proposals to require EPC Band C by April 2027 and EPC Band B by 2030.

For commercial landlords and property investors across England and Wales, this creates an urgent need to improve the energy efficiency of their portfolios. With an estimated 75% of commercial properties currently rated below Band B, the scale of the challenge is considerable. However, it also presents a significant opportunity: properties that achieve high EPC ratings command rental premiums, attract better tenants, and benefit from higher capital values.

Among all available energy efficiency measures, commercial solar panel installation consistently delivers the largest improvement to EPC ratings, frequently lifting properties by two or more bands. When combined with complementary measures, solar makes achieving Band B a realistic and financially attractive proposition for the vast majority of commercial properties.

MEES Timeline: Key Dates for Landlords

How Solar Panels Improve EPC Ratings

Energy Performance Certificates assess a building's energy efficiency on a scale from A (most efficient) to G (least efficient), using a points-based system called the Standard Assessment Procedure (SAP) for residential properties or the Simplified Building Energy Model (SBEM) for commercial properties. Solar panels improve your EPC rating by reducing the building's net energy demand from the grid, which directly lowers the calculated carbon emissions and energy costs used to determine the EPC band.

The impact of solar on your EPC rating depends on several factors including the system size relative to the building's energy demand, the orientation and pitch of the roof, and the building's existing energy consumption profile. In our experience across hundreds of commercial installations, solar panels typically improve EPC ratings by the following amounts:

As the table demonstrates, solar panels deliver the greatest EPC improvement per pound invested and the fastest payback of any major energy efficiency measure. A well-sized solar installation alone can take a property from Band D to Band B, and when combined with LED lighting, the improvement is typically sufficient to achieve Band A on many commercial buildings. For a personalised assessment, use our commercial solar calculator to estimate the potential impact on your property.

Penalties for MEES Non-Compliance

The financial penalties for failing to meet MEES requirements are substantial and should not be underestimated. Local authority trading standards teams are responsible for enforcement, and penalties are calculated based on the rateable value of the property and the duration of non-compliance.

Properties Under £100,000 Rateable Value

Properties Over £100,000 Rateable Value

Beyond financial penalties, non-compliant landlords cannot legally grant new leases or renew existing ones. This effectively makes the property unlettable, which for most commercial property investors represents a far greater financial loss than the penalty itself. Proactive investment in solar and energy efficiency protects both your rental income and your capital value.

Which Commercial Properties Are Affected?

MEES regulations apply to all commercially let properties in England and Wales that are required to have an Energy Performance Certificate. This encompasses a broad range of property types and letting arrangements:

Limited exemptions exist for listed buildings where improvements would unacceptably alter the building's character, properties where the landlord has carried out all relevant improvements up to the cost cap (currently £3,500 inclusive of VAT per improvement for domestic properties; no cap currently set for commercial), and short-term lettings of fewer than six months. All exemptions must be registered on the PRS Exemptions Register and are valid for a maximum of five years, after which the property must be reassessed.

Case Studies: EPC Improvement Through Solar

The following case studies illustrate the dramatic EPC improvements that commercial solar installations deliver across different property types. Each example represents a real project completed by our installation teams.

Solar System:

Additional Measures:

Annual Energy Saving:

Rental Premium:

The Financial Case for MEES Compliance with Solar

Investing in commercial solar to achieve MEES compliance is not merely a regulatory expense; it is a sound financial decision that enhances property value and rental income whilst reducing operating costs. Research consistently shows that energy-efficient commercial properties outperform less efficient counterparts on every financial metric.

6-15%

Rental premium for high EPC-rated properties compared to equivalent buildings with lower ratings

8-12%

Higher capital values for properties with EPC Band B or above versus comparable D-rated properties

3-5 yrs

Typical payback period for commercial solar installations on commercial properties

Our detailed commercial solar panel cost guide provides comprehensive pricing information for different system sizes and property types. For landlords concerned about upfront costs, we offer a range of financing options including Power Purchase Agreements that require zero capital outlay whilst still improving your property's EPC rating.

Getting Your EPC Assessment

Before implementing improvements, you need to understand your property's current EPC rating and identify the most cost-effective measures for achieving the required band. We work closely with accredited commercial energy assessors who specialise in identifying solar-led improvement strategies.

Step 1: Commission a current EPC assessment from an accredited commercial energy assessor. Our partners at EPC for Businesses specialise in commercial EPC assessments and can provide detailed recommendations on the most effective improvement measures for your property type.

Step 2: Request a free solar site survey from our team. We will assess your roof space, orientation, structural suitability, and energy consumption to design a system that maximises both your EPC improvement and financial return. Our proposals include projected EPC improvements based on the SBEM methodology.

Step 3: For landlords managing portfolios, our partners at Landlord EPC Compliance offer portfolio-wide EPC management services, helping you prioritise properties and develop a phased improvement plan that meets all MEES deadlines cost-effectively.

Step 4: For properties requiring a comprehensive energy audit alongside EPC improvement, Commercial Energy Audits provide detailed assessments that cover both MEES compliance and broader energy efficiency opportunities, including ESOS requirements for qualifying businesses.

Solar as the Highest-Impact EPC Improvement

When commercial energy assessors model improvement options for commercial properties, solar panels consistently emerge as the single highest-impact measure for improving EPC ratings. This is because the SBEM calculation heavily weights a building's reliance on grid electricity, and solar directly reduces this dependency.

Unlike insulation improvements that are constrained by existing building fabric, or heating system upgrades that require extensive disruption, commercial solar panels can be installed on most flat and pitched commercial roofs with minimal disruption to building occupants. Installation typically takes 2-4 weeks for systems up to 100kW, and the works are conducted entirely on the roof, allowing normal business operations to continue throughout.

Moreover, solar is the only major EPC improvement measure that generates revenue. Through the Smart Export Guarantee, surplus electricity is sold back to the grid, and the energy consumed on-site directly offsets electricity purchases. This means solar panels pay for themselves whilst improving your EPC rating, a combination that no other energy efficiency measure can match.

Quick Win Strategy

For properties needing a rapid EPC improvement, we recommend a combined solar and LED lighting package. This combination typically delivers a 20-50 point EPC improvement, costs less than solar alone for the equivalent improvement, and can be fully installed within 4-6 weeks. Contact us for a free assessment to determine whether this strategy would achieve your target EPC band.

MEES and Solar: Frequently Asked Questions

Related Resources

Get Your Free EPC Improvement Assessment

Find out how solar can improve your property's EPC rating. Free site survey and proposal included.

MEES Key Facts

EPC Band C required by April 2027

EPC Band B required by 2030

Penalties up to £150,000 per property

Solar improves EPC by 2-3 bands typically

6-15% rental premium for Band B properties

Solar is the highest-impact EPC measure

EPC & Compliance Partners

Highlights

• April 2018
• MEES introduced for new leases. Minimum EPC rating of E required for new lettings and lease renewals.
• Passed
• April 2023
• MEES extended to all existing leases. All commercial properties must now meet minimum EPC E to remain lawfully let.
• Passed
• April 2027
• Proposed minimum raised to EPC Band C. Properties rated D or below will be unable to be let.
• Upcoming
• 2030
• Proposed minimum raised to EPC Band B. Only properties achieving Band B or above will be legally lettable.
• Upcoming

• Office Buildings
• All office spaces including serviced offices, co-working spaces, and traditional office lets
• Retail Premises
• High street shops, retail parks, supermarkets, and shopping centres
• Industrial Units
• Warehouses, distribution centres, factories, and light industrial premises
• Mixed-Use Properties
• Buildings combining commercial and residential use, assessed on the commercial element
• Leisure Properties
• Hotels, restaurants, gyms, cinemas, and entertainment venues
• Healthcare Premises
• Private medical centres, dental surgeries, and care homes with commercial leases

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