UK office tenants are increasingly being pulled into conversations that used to sit almost entirely with landlords: EPC ratings, retrofit works and Minimum Energy Efficiency Standards (MEES).
That’s because changes to energy efficiency regulations could affect far more than a building’s environmental credentials. Depending on how the rules evolve, they could influence lease renewals, break options, assignment opportunities, service charge costs and even whether some offices remain viable to occupy in the long term.
If you’ve got a lease renewal, break clause or office move coming up in the next few years, these regulations could start affecting your options sooner than you think.
While the current legal minimum remains EPC E for commercial lettings in England and Wales, proposed future tightening — commonly discussed as EPC C by 2027 and EPC B by 2030 — could have a direct impact on renewals, assignments, subletting and occupancy costs.
For tenants, the key question isn’t just whether a building complies today. It’s whether it’ll still work for your business over the life of the lease.
Key insights
- The current legal minimum for privately rented non-domestic property in England and Wales is EPC E. Since 1 April 2023, this has applied to all existing commercial lettings unless a valid exemption is registered.
- Proposed future MEES thresholds commonly discussed across the market are EPC C by 2027 and EPC B by 2030, though these remain subject to further government decisions and legislation as of 2026.
- Tenants can face direct exposure at lease events including renewals, assignments, subletting and break dates if a building falls below future standards.
- Under many FRI leases, some retrofit-related costs may still be recoverable through service charge or cooperation clauses depending on the wording.
- Tenants planning lease decisions in 2026 should review EPC ratings and landlord upgrade strategies now rather than waiting for full regulatory certainty.
Quick definitions
EPC (Energy Performance Certificate)
A certificate that rates a building’s energy efficiency from A (most efficient) to G (least efficient).
MEES (Minimum Energy Efficiency Standards)
The legal minimum EPC standard required before certain rented properties can be lawfully let in England and Wales.
FRI lease (Full Repairing and Insuring lease)
A common UK commercial lease structure where the tenant takes responsibility for repair, maintenance and insurance-related costs, either directly or through service charge.
Green lease
A lease containing environmental or sustainability provisions, such as energy data-sharing obligations or cooperation on efficiency improvements.
Where MEES stands now and what is proposed for 2027 and 2030
Current law: The EPC E minimum for existing lettings
The current MEES framework for non-domestic property sits under the Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015, as amended.
Since 1 April 2023, landlords have generally been prohibited from continuing to let commercial property with an EPC rating below E unless a valid exemption applies.
That means a landlord can’t usually grant, renew or continue certain lettings of an office rated F or G without either improving the building or registering an exemption.
For tenants, that matters because compliance affects whether the space can legally continue to be let, not just the landlord’s investment position.
Proposed thresholds: EPC C by 2027 and EPC B by 2030
The commercial property sector has spent several years preparing for proposed future tightening of MEES standards, particularly the idea of EPC C by 2027 followed by EPC B by 2030.
What “non-compliant” actually means for a tenant
MEES obligations formally sit with landlords, but the consequences can land directly with occupiers.
If a building can’t legally be let because it falls below the required EPC threshold, several tenant issues can start to emerge:
- lease renewals may become more complicated
- assignments or subletting could become harder
- landlords may need to carry out disruptive retrofit works during occupation
- lenders and investors may treat the building as a stranded asset
- occupiers could face pressure to relocate earlier than planned
Importantly, “non-compliant” doesn’t automatically mean immediate eviction or operational disruption. Many buildings qualify for temporary exemptions and enforcement is targeted at landlords rather than tenants.
But if you’re approaching a lease event, the practical risk is that the building becomes harder to renew, assign or sublet.
A tenant occupying EPC D office space today could therefore face a very different negotiation environment by the end of the decade.
Landlord vs tenant: who pays for compliance under a typical FRI lease
Repair, alteration and service charge clauses
Under a typical FRI lease, landlords usually remain responsible for structural upgrades and wider statutory compliance works.
That said, tenants may still contribute indirectly through service charge recovery provisions, reinstatement obligations at lease expiry, fit-out requirements and landlord access rights needed to complete improvement works.
Whether retrofit expenditure can legitimately be passed through service charge depends heavily on the lease wording. Some leases exclude capital expenditure entirely. Others allow recovery where works improve statutory compliance or operational efficiency.
Tenants should also look carefully at alteration clauses. A fit-out that negatively affects EPC performance could create future friction with the landlord or limit approval for later works.
Green lease clauses tenants should scrutinise
Green lease clauses are becoming increasingly common across newer office leases in England and Wales.
Typical provisions might include:
- energy consumption data-sharing
- cooperation on sustainability initiatives
- restrictions on alterations affecting EPC ratings
- landlord rights of access for improvement works
- obligations to use energy-efficient materials or systems
None of these clauses are necessarily problematic. The key is understanding whether they create open-ended operational obligations or indirect cost exposure.
If your lease contains retrofit obligations, energy performance cooperation clauses or unusually broad service charge wording, it’s worth getting legal advice before signing.
How MEES risk crystallises at key lease events
Renewal and break dates near the 2027 and 2030 thresholds
If your office is currently EPC D and your lease renewal falls close to a future tightening deadline, both you and your landlord could face uncertainty over whether the building can continue to be let without improvement works.
In practice, this can influence renewal negotiations, rent review assumptions, the timing of break options, dilapidations discussions and longer-term relocation planning.
For example, a tenant with a 2028 break option may find the landlord wants to complete major retrofit works before agreeing any extension. Equally, a landlord may become less willing to offer long lease terms on a marginally compliant building.
Even where regulations remain proposed rather than enacted, market behaviour tends to move ahead of legislation.
Assignment, subletting and new lettings
Assignment and subletting exposure is often overlooked.
A tenant trying to assign space in a lower-rated building could face a smaller pool of interested occupiers if the building looks likely to become non-compliant during the assignee’s term.
Similarly, landlords may become more selective about licences to assign or sublet where future compliance risk exists. For growing businesses, that creates a practical problem: lease flexibility itself may become tied to EPC performance.
Which UK office markets could face the biggest MEES challenge?
While MEES applies across England and Wales, the level of risk isn’t evenly distributed. In practice, future compliance challenges are likely to be concentrated in parts of the market with large volumes of older office stock that haven’t undergone significant refurbishment in recent years.
For tenants, that means it’s often more useful to think about building age and quality than geography alone.
Older secondary office stock in Central London
Investment in London office space has resulted in much new, highly efficient office developments over the last decade. However, it also contains a significant amount of older secondary office stock, particularly in areas where buildings have been repositioned rather than comprehensively refurbished.
Tenants considering older offices in locations such as the West End, the City or fringe markets should pay close attention to the building’s EPC rating and any planned improvement works. An attractive rent today may need to be weighed against the possibility of future retrofit programmes, disruption or reduced lease flexibility.
Regional city centres with large legacy office markets
Major regional office markets including Birmingham, Manchester, Leeds and Bristol have benefited from significant development activity, but they also retain sizeable stocks of older office buildings.
For occupiers, the key consideration isn’t the city itself but the specific building being leased. Two offices on the same street can have very different EPC ratings, compliance strategies and future upgrade requirements. That’s why reviewing a building’s current EPC certificate and the landlord’s long-term plans should form part of any relocation or renewal decision.
Business parks and out-of-town offices
Many business parks were developed during periods when energy efficiency standards were less demanding than they are today. While some assets have since been upgraded, others may require more substantial improvement works to meet future standards if regulations tighten.
Tenants occupying business park space should pay particular attention to planned refurbishment programmes, service charge provisions and any landlord strategy for future compliance. Buildings that haven’t been modernised for some time may face greater pressure to improve performance over the coming years.
Ultimately, tenants shouldn’t assume that a particular city or submarket is automatically high or low risk. The more important question is whether the individual building has a credible path to meeting future energy efficiency requirements. Understanding that position before a lease renewal, break date or relocation can help avoid costly surprises later on.
Due diligence questions for tenants evaluating new office space
Before signing a new lease, tenants should ask for clear information on the building’s energy position and future compliance strategy.
Key questions include:
- What’s the current EPC rating and expiry date?
- Has the landlord commissioned a MEES improvement strategy?
- Are major retrofit works planned during the proposed lease term?
- Could improvement costs be recovered through service charge?
- Does the lease contain green lease provisions?
- Are there restrictions on fit-out affecting EPC performance?
- Has the building relied on any registered exemptions?
- Is the landlord targeting EPC C or EPC B voluntarily ahead of regulation?
It’s worth requesting documentary evidence rather than relying solely on marketing claims. Voluntary certifications such as BREEAM or NABERS may indicate broader sustainability credentials, but they’re separate from statutory MEES compliance requirements.
MEES exemptions and why tenants shouldn’t rely on them
The MEES framework includes several exemptions, most notably the seven-year payback test, situations where required third-party consent cannot be obtained, and cases where improvement works would cause a material reduction in property value.
These can temporarily allow continued letting of lower-rated buildings. However, exemptions are generally time-limited and evidence-based. They don’t necessarily provide long-term certainty for occupiers.
Future reforms could also narrow the scope or usefulness of some exemptions if standards tighten further. From a tenant perspective, an exemption shouldn’t automatically be treated as a long-term solution, particularly for leases running towards 2030.
Planning checklist and solutions for UK office tenants acting in 2026
Immediate steps and cost categories to model before your next lease event
For occupiers with lease events approaching in the next two to four years, early planning is becoming increasingly important.
A practical tenant checklist should include:
- requesting the building’s current EPC certificate and expiry date
- reviewing lease provisions covering service charge, alterations and green clauses
- mapping your next break, renewal or expiry date against proposed MEES milestones
- asking the landlord whether improvement works are planned
- understanding whether retrofit costs could affect occupational costs
- modelling relocation scenarios if the building’s future compliance outlook looks weak
- assessing assignment and subletting flexibility before committing to lease length
- taking legal and surveying advice before agreeing lease renewals in lower-rated buildings
Cost categories worth modelling may include:
- increased service charge during retrofit works
- temporary operational disruption
- rent differentials between compliant and non-compliant buildings
- fit-out adaptation costs
- relocation and reinstatement expenditure
For some occupiers, particularly businesses seeking flexibility during a period of regulatory uncertainty, serviced offices or managed space may become part of the solution while the market adjusts to future MEES requirements.
The point isn’t that every EPC D office will suddenly become unusable. It’s that tenants who leave MEES considerations until lease renewal could find themselves with fewer options, higher costs and less flexibility than they expected. Like most property risks, planning early usually puts you in the strongest position.
Does your current office meet future EPC requirements?
If your current office may struggle to meet future EPC requirements, it’s worth reviewing your options before your next lease event approaches.
Comparing conventional leases with flexible or managed workspace early can help reduce compliance risk, avoid disruption and give your business more room to adapt as regulations evolve. Start your search with Hubble today!
