Energy Efficiency in Commercial Buildings: EPC Ratings, MEES and What Landlords Need to Do

Energy performance is no longer just a "green" consideration for commercial property. It is a hard financial reality. The UK government has signalled its intention to raise the minimum EPC standard for commercial lettings to Band B by 2030. For landlords with older, less efficient buildings, the cost of achieving that standard — or the financial consequences of failing to do so — could be enormous.

At the same time, tenants are increasingly scrutinising energy performance as part of their own environmental, social and governance (ESG) commitments. Buildings with poor energy ratings are becoming harder to let, even before the regulatory deadline. The commercial property market is already showing a clear "green premium" and, conversely, a growing "brown discount" on energy-inefficient assets.

This guide explains the current and forthcoming MEES rules, what EPC ratings mean for commercial property, what improvement works are typically required, and how a commercial building survey and planned preventative maintenance plan can help you navigate the transition.

What Is an EPC (Energy Performance Certificate)?

An Energy Performance Certificate (EPC) rates a building's energy efficiency on a scale from A (most efficient) to G (least efficient). For commercial buildings, the EPC is produced using the Display Energy Certificate (DEC) process for public buildings, or the Non-Domestic EPC (NDEP) process for commercial and industrial properties.

A commercial EPC is required whenever a building is:

• Constructed
• Sold
• Let to new tenants

The EPC is based on the building's fabric, heating, ventilation, air conditioning and lighting systems. It also provides a set of recommendations for improving energy efficiency, ranked by cost-effectiveness.

Commercial EPCs are valid for 10 years, unless significant alterations are made to the building in the meantime. Many older commercial buildings have EPCs that have never been updated and may not accurately reflect the current condition of the building's services or fabric.

The Minimum Energy Efficiency Standards (MEES)

The Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 — commonly known as the MEES regulations — introduced minimum energy efficiency standards for privately rented properties. For commercial (non-domestic) properties, the MEES regulations have evolved as follows:

Current Position (2025)

Since 1 April 2023, it has been unlawful to continue to let a commercial property with an EPC rating of F or G. This applies to all commercial leases — not just new lettings. Landlords cannot continue letting a substandard property, even under an existing lease, without either improving the energy performance to meet the minimum standard or registering a valid exemption.

Forthcoming Changes

The government has consulted on raising the minimum standard for commercial lettings to EPC Band C by 2027 and Band B by 2030. While exact legislative timetables can change, the direction of travel is clear and unambiguous: commercial property must become significantly more energy efficient over the next five years.

This has major implications for commercial landlords. A significant proportion of the existing UK commercial building stock is currently rated at D or E. Achieving a B rating will, for many buildings, require substantial investment in insulation, glazing, heating and ventilation systems, and potentially renewable energy generation.

MEES Exemptions for Commercial Properties

There are a limited number of exemptions available to commercial landlords who cannot achieve the minimum EPC standard. These include:

• All improvements made exemption — If you have made all the cost-effective energy efficiency improvements identified in the EPC recommendations and the property still falls below the minimum rating, you may register an exemption
• Third-party consent exemption — If improvements require consent from a superior landlord, tenant or planning authority that cannot reasonably be obtained
• Devaluation exemption — If a RICS-registered valuer confirms that the energy efficiency improvements would reduce the market value of the property by more than 5%
• New landlord exemption — A six-month temporary exemption for new landlords who have recently acquired the property

Exemptions must be registered on the national PRS Exemptions Register. They are not automatic — the evidence requirements are strict and the burden of proof is on the landlord. Do not assume an exemption applies without taking proper professional advice.

What Energy Efficiency Improvements Are Typically Required?

The most common energy efficiency improvements required to bring commercial buildings up to EPC standard include:

Building Fabric

• Roof and ceiling insulation upgrades
• External wall insulation (cavity fill or internal lining)
• Double or triple glazing replacement
• Air tightness improvements and draught proofing
• Ground floor insulation

Heating and Cooling Systems

• Replacement of ageing boilers with high-efficiency condensing boilers or heat pumps
• Upgrade of HVAC (heating, ventilation and air conditioning) systems
• Building management systems (BMS) to optimise energy use
• Zoned heating controls and programmable thermostats

Lighting

• Replacement of fluorescent lighting with LED throughout
• Occupancy sensors and daylight-linked dimming controls

Renewable Energy

• Solar photovoltaic (PV) panels on suitable roof areas
• Solar thermal systems
• EV charging infrastructure (increasingly required in planning conditions)

The cost of these improvements varies widely depending on the size, age and construction type of the building. For a typical 1,000 sq m office building, energy efficiency improvements to achieve an EPC B rating can range from £50,000 to £300,000 or more. This is a significant investment that must be planned and budgeted carefully.

EPC Ratings and Commercial Building Surveys

A commercial building survey does not produce or replace an EPC — these are separate documents produced by different professionals. However, there is a strong relationship between the findings of a building survey and a property's energy performance:

• A building survey will identify defects in the building fabric — poor insulation, single glazing, air leakage, damp — that are likely to be reducing the EPC rating
• It will identify ageing or failing building services that will need replacement as part of any energy upgrade programme
• It will assess the condition of existing insulation, glazing and heating systems
• A planned preventative maintenance plan produced alongside the survey can sequence energy upgrade works efficiently and within budget

For investors carrying out technical due diligence on a commercial acquisition, the EPC rating and MEES compliance position should always be reviewed as part of the process. A building with a current D or E rating may require significant capital investment to achieve compliance with forthcoming MEES standards — and that should be factored into the acquisition price.

The Financial Case for Energy Efficiency Investment

Beyond regulatory compliance, there is a compelling financial case for improving the energy efficiency of commercial buildings. The evidence is increasingly clear:

• Higher rents: Energy-efficient buildings command rental premiums of 5–15% compared to equivalent buildings with poor energy ratings, according to recent research by JLL and CBRE
• Lower void periods: Tenants are actively seeking energy-efficient space as part of their own ESG commitments and to reduce occupancy costs
• Better capital values: Green-rated buildings are achieving capital value premiums as investors price in both the regulatory risk of non-compliant assets and the income security of well-let, energy-efficient buildings
• Lower operating costs: Energy-efficient buildings cost less to run, improving tenant affordability and reducing service charge exposure for landlords
• Reduced stranded asset risk: Buildings that remain energy-inefficient risk becoming economically obsolete as MEES standards tighten

A Case Study: Energy Upgrade Adds £200,000 to Asset Value

In 2023, we were instructed to carry out a commercial building survey and PPM assessment on a mid-1990s office building in the East of England for a client considering a hold and refurbish strategy. The building had a current EPC rating of D and was let at below-market rent to a single tenant on a lease expiring in 18 months.

Our survey identified that the building's roof insulation was below current standards, the single-glazed curtain walling was a major source of heat loss, and the boiler plant was at end of life. We produced a costed upgrade programme of approximately £165,000, including roof insulation, curtain walling replacement and a new high-efficiency boiler.

The works, combined with LED lighting throughout, were modelled to improve the EPC rating from D to B. The client carried out the works during the void period after lease expiry. They then relet the building at a 12% premium to market rent — reflecting its improved energy performance — and achieved a valuation uplift of approximately £210,000 on the improved rent and reduced yield that an energy-efficient asset commanded in that market.

The energy investment paid for itself many times over — and positioned the building for regulatory compliance through at least 2030.

Summary and Next Steps

• ✅ Check the current EPC rating for all commercial properties you own or manage
• ✅ Assess compliance with current MEES (F and G ratings are already unlettable)
• ✅ Model the cost and feasibility of upgrading to EPC B ahead of the 2030 target
• ✅ Commission a commercial building survey to identify fabric and services issues affecting energy performance
• ✅ Produce a PPM plan that sequences energy upgrade works efficiently
• ✅ Factor MEES compliance into any commercial property acquisition or investment decision

Frequently Asked Questions