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Minimum Energy Efficiency Standard (MEES)

Minimum Energy Efficiency Standard (MEES): Improving building energy performance in the UK

Onye Dike
Written by Onye Dike
Updated on March 26th, 2026

Summary

The Minimum Energy Efficiency Standard (MEES) is a UK regulation requiring landlords in England and Wales to ensure rented properties meet minimum energy performance levels, typically EPC rating E or above. It applies to most properties requiring an EPC and is enforced by local authorities through compliance checks and financial penalties.

Details

Jurisdictions
  • The United Kingdom
Mandatory for

The MEES is mandatory for landlords of private rented properties in England and Wales that are legally required to have an Energy Performance Certificate (EPC). EPCs rate energy efficiency from A (most efficient) to G (least efficient).

Deep dive

3 min read
Updated Mar 26, 2026

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Introduction

The Minimum Energy Efficiency Standard (MEES) is a UK regulation that sets a minimum level of energy performance for rented properties in England and Wales. Introduced under the Energy Efficiency (Private Rented Property) Regulations 2015, it requires landlords to meet specified energy efficiency thresholds before leasing buildings. The policy is based on Energy Performance Certificates (EPCs), which rate buildings from A (most efficient) to G (least efficient). Under current rules, most rented properties must achieve at least an EPC rating of E, unless a valid exemption applies. This requirement has applied to new tenancies since April 2018 and to all tenancies since April 2020. MEES forms part of the UK’s broader strategy to reduce carbon emissions, improve building performance, and address fuel poverty, particularly in the private rented sector.

Requirements of the Minimum Energy Efficiency Standard

Compliance with MEES is mandatory for landlords and property owners in the private rented sector. The process typically involves:

  • Assessing the property’s energy performance by obtaining a valid EPC, which determines whether the property meets the minimum required rating.

  • Improving energy efficiency where needed, for example through insulation, heating upgrades, or other retrofit measures to raise the EPC rating to at least E.

  • Registering exemptions if applicable, such as where improvements are not cost-effective or would negatively affect the property; exemptions must be recorded on the official register.

  • Ensuring ongoing compliance, as it is unlawful to let or continue letting properties rated F or G without a valid exemption.

Enforcement and Penalties

MEES is enforced by local authorities, which can investigate compliance and impose penalties. If a property is found to be non-compliant, authorities may issue fines within 18 months of the breach and publish details of the violation for at least 12 months.

Penalties vary by breach and apply per property, with fines up to £2,000 for short-term non-compliance (under 3 months), £4,000 for longer breaches, £1,000 for false information, and £2,000 for failing to comply with notices. The maximum total penalty per property is £5,000.

Recent enforcement action has seen the Wandsworth Council target over 550 non-compliant rental properties, contacting landlords and issuing fines. This included a £4,000 penalty for a Battersea property let with a G-rated EPC, and a maximum £5,000 fine in Balham after the landlord ignored a compliance notice and failed to carry out the necessary improvements or secure an exemption in time.

Resources


Onye Dike
Added by:
Onye Dike
Sustainability Research Analyst
Onye Dike is a Sustainability Research Analyst at Net Zero Compare, where he contributes to research and analysis on environmental regulations, carbon accounting, and emerging sustainability trends.
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Added on Mar 25, 2026 by Onye Dike · Updated on Mar 26, 2026