MEES Regulations for Commercial Offices: 2027 Explained

Last updated: 11 November 2026

Priority First notes that the Minimum Energy Efficiency Standards (MEES) rules no longer require commercial offices to reach EPC C by 2027. The government confirmed in June 2026 that this interim milestone has been scrapped, replacing it with a single target of EPC B by 2031 for privately rented non-domestic buildings over 1,000 square metres, where cost-effective, according to Burges Salmon.

Key Takeaways

• The EPC C by 2027 milestone has been dropped entirely, according to Propertymark, giving landlords and tenants more time to improve buildings.
• From 2031, privately rented non-domestic buildings over 1,000 square metres in England and Wales must reach a minimum EPC B, where cost-effective, per Burges Salmon.
• More than 13,000 commercial rental properties in England and Wales already fail current MEES standards, including nearly 5% of total office stock, according to Morningstar / AccessWire.
• 72.7% of assessed commercial buildings sit below EPC B, based on an analysis of over 800,000 currently-valid commercial EPCs by EasyEPC.
• Savills research found around 85% of office stock in major UK markets is rated EPC C or below, with landlords facing up to £63 billion in total upgrade costs, according to Savills.

What is MEES and what does it require?

Priority First explains that MEES — the Minimum Energy Efficiency Standards — is a set of regulations made under the Energy Act 2011 that sets a minimum Energy Performance Certificate (EPC) rating a commercial or residential property must hold before it can lawfully be let. For non-domestic property in England and Wales, the current legal floor is EPC E: a landlord cannot grant a new lease, renew an existing one, or continue letting a sub-standard building without a valid exemption registered on the PRS Exemptions Register.

The rules apply to almost all privately rented non-domestic buildings, from offices and retail units to warehouses and industrial premises. Buildings larger than 1,000 square metres matter disproportionately here: they account for just 5% of total commercial stock but around 50% of the energy that stock uses, according to Stephenson Harwood, citing the 2021 government consultation. That concentration of energy use is precisely why the Department for Energy Security and Net Zero (DESNZ) has targeted larger buildings first in its revised trajectory.

For office occupiers and facilities managers, MEES sits alongside other compliance obligations — fire safety under the Regulatory Reform (Fire Safety) Order 2005, health and safety duties under the Health and Safety at Work etc. Act 1974, and increasingly, ESG and net zero reporting commitments. Priority First manages buildings where these obligations overlap daily, coordinating facilities management alongside security so that compliance isn't treated as a one-off project but as part of ongoing building operations.

What will the minimum EPC rating be for commercial properties from 2027?

Commercial offices will not face a 2027 EPC deadline at all under the current proposals. The government's June 2026 interim response confirmed that the previously proposed interim milestone of EPC C by 2027 will not be taken forward, according to Propertymark.

Instead, DESNZ has set a single, later target: from 2031, all privately rented non-domestic buildings over 1,000 square metres in England and Wales will need a minimum EPC B rating, where cost-effective, confirms Burges Salmon. This followed the government's 2019 and 2021 MEES consultations and a Written Ministerial Statement confirming the revised approach.

The "where cost-effective" qualifier matters legally and practically. It means landlords will be able to rely on a cost-effectiveness test — similar to the existing £3,500 spending cap exemption mechanism — rather than face an absolute obligation regardless of expense. Smaller buildings under 1,000 square metres remain subject to the existing EPC E minimum for now, with no confirmed future uplift date announced for that segment.

What is the compliance timeline for MEES changes affecting commercial offices?

The MEES timeline for commercial offices now runs on a longer, two-stage basis rather than the three-step trajectory originally floated. The current EPC E minimum remains in force today for all non-domestic lettings in England and Wales, with no gap in enforcement during the transition.

Here's how the revised timeline compares with what was previously proposed:

Priority First advises that a full government response to the 2019 and 2021 consultations is still expected, which should bring secondary legislation setting out the precise enforcement mechanism, the cost-effectiveness test, and any treatment of buildings below the 1,000 square metre threshold. Priority First advises landlords to treat 2031 as the working deadline for larger office buildings and continue monitoring DESNZ announcements rather than assuming the timeline is fixed indefinitely.

Who is responsible for MEES compliance — landlord or tenant?

The landlord carries the legal MEES compliance obligation, not the tenant, because MEES regulates the act of letting a property rather than occupying one. A landlord who grants a new lease, renews a lease, or extends a tenancy on a sub-standard building without a valid exemption breaches the regulations, regardless of what the tenant does internally.

That said, leases commonly allocate practical responsibility for alterations, service charge contributions, or access for works between landlord and tenant through the lease terms themselves. A Full Repairing and Insuring (FRI) lease, common in UK commercial property, can shift some cost burden onto the tenant through service charge mechanisms, even though the statutory compliance duty stays with the landlord. This is why lease drafting and dilapidations clauses increasingly address EPC improvement works explicitly, particularly at rent review or lease renewal under the Landlord and Tenant Act 1954.

Facilities managers sit in the middle of this relationship in practice. Priority First's building management work routinely involves coordinating access for contractors, surveys and plant replacement across multi-let office buildings — work that becomes more frequent as landlords move towards EPC B compliance ahead of 2031.

What are the penalties for non-compliance with MEES regulations?

Non-compliance with MEES currently exposes landlords to civil penalties issued by local Trading Standards authorities, calculated according to the rateable value of the property and the length of the breach. Penalties for non-domestic property can reach significant five- and six-figure sums for prolonged or repeated breaches, alongside publication of the breach on the PRS Exemptions Register, which is visible to prospective tenants and buyers conducting due diligence.

Beyond the formal fine, a sub-standard EPC rating that triggers a MEES breach can also invalidate a letting itself in certain circumstances, creating knock-on risk around rent collection and lease enforceability. Reputational exposure compounds this: institutional investors, pension funds and larger occupiers increasingly screen EPC compliance as part of ESG due diligence before acquiring or leasing a building, meaning non-compliance can affect a building's marketability long before any fine is issued.

"The front desk has become the job interview. Visitors judge a business within moments of walking in, so corporate security now has to be excellent twice over — welcoming to the people you want in the building and immovable to the people you don't. Hiring for one without the other fails at both." — Mo Hassan, Managing Director, Priority First

The same logic applies to energy performance. A building's EPC rating is now part of how it's judged before anyone sets foot inside it, shaping leasing decisions well ahead of occupation.

Are there exemptions available for landlords who cannot meet MEES requirements?

Exemptions exist under MEES for landlords who can demonstrate that required improvements are not achievable within defined limits, and these exemptions must be registered on the PRS Exemptions Register to be valid. The main categories include the "all relevant improvements made" exemption, the devaluation exemption (where improvements would reduce the property's market value by more than 5%), the third-party consent exemption (where a tenant, lender or planning authority refuses consent), and a high-cost exemption tied to a spending cap.

Exemptions are not permanent. Most last five years and must be re-registered and re-justified, meaning a landlord cannot simply claim an exemption once and ignore the building indefinitely. As the 2031 EPC B deadline approaches, DESNZ's proposed "cost-effective" qualifier is expected to function similarly — likely requiring landlords to show that specific measures fail a cost-effectiveness test rather than exempting an entire building outright. Landlords relying on exemption strategies should document survey evidence, quotes obtained and any third-party refusals carefully, since Trading Standards can request this evidence during an investigation.

How do the 2027 MEES requirements compare with the current 2023 MEES standards?

Priority First points out that the current MEES standard, in force since 1 April 2023, requires all non-domestic lets in England and Wales to hold a minimum EPC E rating, with no higher interim step in force today. The headline change from the June 2026 announcement is that a 2027 EPC C standard will never arrive — it has been removed from the trajectory entirely rather than merely delayed.

This is a meaningful shift in substance, not just timing. Under the original 2021 consultation proposals, landlords faced two uplifts: EPC C by 2027 and EPC B by 2030. The revised position compresses this into a single later target — EPC B by 2031 — for buildings over 1,000 square metres, while leaving the position for smaller buildings unresolved pending the government's full consultation response. For an office landlord or facilities manager who had already begun budgeting for a 2027 EPC C deadline, this means more lead time, but also more uncertainty about the smaller-building threshold and the precise definition of "cost-effective" that will eventually be written into secondary legislation.

How much does it cost to upgrade a commercial office to meet MEES standards?

Upgrading a commercial office to meet a higher EPC band typically involves a combination of fabric improvements, lighting upgrades, heating and cooling system replacement, and controls work, with costs varying enormously by building age, size and starting EPC band. Savills research estimated that UK office landlords could collectively face up to £63 billion in costs to bring stock up to the proposed EPC B minimum, based on the finding that around 85% of office stock in major UK office markets sits at EPC C or below, with roughly 800 million square feet below the proposed EPC B threshold, according to Savills.

Jack Pugh, Director in Savills' Building & Project Consultancy team, noted that "at present the average EPC rating for a commercial building in the UK stands at Grade 'D', meaning a significant proportion of existing building stock will be impacted by the proposed change of regulations."

Costs for individual buildings vary widely, but typical interventions include:

• LED lighting retrofits with intelligent controls
• Replacement of ageing gas boilers with heat pumps or hybrid systems
• Building Management System (BMS) upgrades for better controls and monitoring
• Improved glazing and insulation to reduce fabric heat loss
• On-site renewable generation, such as rooftop solar PV

The government's own modelling suggests the investment can pay back over time: DESNZ estimates the measures could save occupiers of the largest rented buildings approximately £360 million per year in energy costs by 2031, according to Burges Salmon.

How might the 2027 MEES changes affect office values, rents and leasing decisions?

Office values and rents are already diverging sharply based on EPC rating, and that gap is expected to widen as 2031 approaches even without a 2027 deadline forcing immediate action. Mat Oakley, Head of Commercial Research at Savills, observed that "in 2021 we saw more than 90% of leasing activity being for the best quality office accommodation in some locations" — a pattern driven as much by occupier ESG commitments as by regulation itself.

With an estimated 680,000 properties — around 75% of relevant stock — not yet aligned with a future EPC B requirement, according to Morningstar / AccessWire, landlords holding older, poorly rated stock face a widening "brown discount" on valuation and rent-review outcomes. Lenders are also factoring EPC trajectories into loan terms, and tenants are increasingly writing EPC improvement obligations into heads of terms at the outset of a lease rather than leaving it to a later dilapidations dispute.

For facilities managers, this means the building operations side of compliance — plant maintenance, metering, BMS data and contractor access — now has a direct line to commercial outcomes, not just a legal one. Priority First's facilities management service coordinates exactly this kind of ongoing building upkeep and compliance tracking, working alongside security operations so that energy-related works, access for surveys, and day-to-day building management sit under one accountable record rather than being managed by disconnected contractors.

In practice, this coordination matters most on live sites undergoing works. On an active Chelsea and Knightsbridge development, Priority First combined construction security with facilities management and site logistics, tracking deliveries, contractor access and maintenance tasks on a single platform rather than leaving them split across separate paper-based systems — the same kind of joined-up record that landlords undertaking EPC improvement works will need as contractors move through occupied buildings.

Your MEES compliance checklist

• Check your building's current EPC rating and expiry date on the government's EPC register
• Confirm whether your building exceeds the 1,000 square metre threshold that triggers the 2031 EPC B target
• Review lease terms to establish who bears the cost of improvement works between landlord and tenant
• Commission a survey to identify the lowest-cost measures that would raise the EPC band
• Register any valid exemption on the PRS Exemptions Register with supporting evidence
• Budget improvement works against the "cost-effective" test expected in forthcoming secondary legislation
• Coordinate contractor access and facilities management so upgrade works don't disrupt occupied space
• Monitor DESNZ announcements for the full consultation response and confirmation of rules for buildings under 1,000 sq m

FAQ

Is the EPC C by 2027 deadline for commercial offices still happening?

No. The government confirmed in June 2026 that the previously proposed interim milestone of EPC C by 2027 will not be taken forward, according to Propertymark. Landlords now work towards a single EPC B target by 2031 for buildings over 1,000 square metres.

What is the current minimum EPC rating required for commercial offices?

The current legal minimum under MEES for non-domestic lettings in England and Wales is EPC E, in force since 1 April 2023. This remains unchanged while the government finalises secondary legislation for the 2031 EPC B requirement.

Does the 2031 EPC B requirement apply to all commercial offices?

No. The confirmed 2031 target applies to privately rented non-domestic buildings over 1,000 square metres, where cost-effective, according to Burges Salmon. The government has not yet confirmed the future requirement for smaller office buildings.

Who is legally responsible for MEES compliance, the landlord or the tenant?

The landlord holds the legal MEES compliance obligation, because the regulations govern the act of letting a property rather than occupying it. Lease terms may allocate cost responsibility differently, but the statutory duty always sits with the landlord.

What happens if a landlord lets a sub-standard office without an exemption?

Landlords face civil penalties from local Trading Standards authorities, calculated by rateable value and breach duration, along with publication on the PRS Exemptions Register. Non-compliance can also affect a building's marketability to ESG-conscious occupiers and investors.

How much could it cost to bring an office up to EPC B standard?

Costs vary significantly by building, but Savills has estimated UK office landlords could collectively face up to £63 billion to meet an EPC B minimum, given that around 85% of major UK office stock currently sits at EPC C or below, according to Savills. Typical works include lighting retrofits, heating system replacement and BMS upgrades.

Can a landlord get an exemption from MEES requirements?

Yes, several exemption categories exist, including devaluation, third-party consent and high-cost exemptions, but each must be registered on the PRS Exemptions Register and typically lasts only five years. Landlords should keep survey and cost evidence on file in case Trading Standards investigates.

Coordinating compliance works with Priority First

Bringing an office building up to MEES standard rarely happens in isolation — it means contractors, surveyors and engineers moving through an occupied or partially occupied building over months, often alongside tenants who still expect uninterrupted security and front-of-house service. Priority First manages exactly this overlap through its facilities management service, coordinating building upkeep, maintenance access and compliance tracking so that energy efficiency works don't compromise day-to-day security or occupier experience.

On live sites, that means logging contractor access, deliveries and maintenance tasks on one accountable record rather than leaving them split across separate systems — the same approach Priority First applied on an active Chelsea and Knightsbridge development combining construction security with facilities management and site logistics.

If your office building is approaching an EPC upgrade programme and you need facilities management that keeps security, access and compliance under one accountable partner, get in touch with Priority First to discuss your site.

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