The relationship between commercial landlords and tenants has long been defined by a split incentive, where neither party really felt financially responsible for eco-friendly upgrades. Landlords see little reason to invest in expensive retrofits when the tenants pay the utility bills, while tenants are reluctant to pay for improvements to a property they don’t own, especially if their lease is short. The result of this impasse is countless commercial buildings languishing with poor EPC ratings.

However, as the 2030 deadline for stricter MEES (Minimum Energy Efficiency Standards) approaches, there’s a definite shift towards a more collaborative framework: the Green Lease. Green leases enable both parties to share the costs of retrofitting, along with the rewards, to make the move towards a more sustainable operation. It ensures properties remain compliant with tightening UK legislation and individual companies meet their Corporate Social Responsibility (CSR) targets.

The regulatory catalyst: MEES 2026–2030

Commercial chartered building surveyors at Bradley-Mason highlight that the government’s focus on the built environment is a direct response to the carbon targets set by 2030:

 “The government estimates that 18% of commercial properties across the UK hold EPC ratings of F or G, and as such the new minimum energy standards aims to improve the EPC ratings of England and Wales commercial building stock, to tackle Greenhouse Gas emissions.”

The move toward a higher EPC rating is forcing a wholesale rewrite of standard lease terms across the commercial property sector. While current regulations already prohibit letting properties with an EPC rating below ‘E’, recent policy has signalled the intention to raise this threshold considerably over the next few years. Many industry experts and recent policy updates point toward an interim requirement of an EPC rating of ‘C’ by 2027/28 culminating in an EPC rating of  ‘B’ by 2030. This creates an urgent need for landlords to act now.

The risks of inaction are severe; properties that fail to meet these standards risk becoming stranded assets. For Merton’s business premises, it’s a challenge and an opportunity to future-proof commercial property investments through strategic retrofitting. Fortunately, BEESS (Merton’s Business Energy Efficiency Support Scheme), is available to help, offering energy audits and match-funded grants to help bridge the financial gaps. 

Anatomy of a green lease

A well-drafted green lease should contain several essential provisions that transform vague sustainability aspirations into concrete obligations. Data sharing clauses, for example, require mandatory reporting on energy, water, and waste usage, giving both parties the information needed to identify improvement opportunities and track progress toward net zero targets.

Cost sharing provisions establish clear frameworks for how retrofitting expenses (such as  installing heat pumps, solar panels, or improving insulation), are recovered either through service charges or rent adjustments. This removes the financial uncertainty that previously paralysed upgrade decisions.

Alteration restrictions also ensure that tenant fit-outs don’t negatively impact the building’s EPC rating, since well-intentioned but poorly executed interior works can undermine the landlord’s compliance position. Together, these clauses create a contractual ecosystem where sustainability becomes a shared responsibility rather than a point of contention.

Benefits for the Merton business community

While regulatory compliance might be the initial drive for landlords creating green leases, there are many benefits beyond this. These agreements protect asset value by ensuring the building remains lettable in an increasingly regulated market, and securing access to green financing products that offer preferential interest rates.

Corporate tenants are increasingly using sustainability credentials when searching for and choosing properties, meaning landlords with green leases can attract and retain high-quality occupants who are willing to pay premium rents for a more energy efficient building. What’s more, tenants can take advantage of lower utility bills, alongside enhanced indoor air quality and thermal comfort to improve employee wellbeing and productivity.

Perhaps most significantly, green leases provide tenants with the documented evidence that they need to hit ESG (Environmental, Social, and Governance) targets, satisfying both investor expectations and consumer demand for corporate environmental responsibility.

Implementing the change

The effectiveness of a green lease depends entirely on the precision of its drafting. There’s a huge difference between “best endeavour” clauses, which essentially ask parties to try their best, and legally binding obligations that create enforceable duties with clear consequences for non-compliance.

Best endeavour language might satisfy corporate communications teams, but it rarely drives meaningful, long-term action. Before drafting any new terms, make sure you have a professional energy audit in place to provide the baseline data you need for an effective improvement roadmap. It’s this technical foundation that will ensure any legal obligations align with practical engineering possibilities and budgetary constraints.

As regulatory pressure intensifies and corporate sustainability requirements become non-negotiable, properties without robust environmental performance clauses will find themselves at a severe competitive disadvantage. The transition to green leases highlights a fundamental reimagining of how landlords and tenants can cooperate to create efficient, valuable, and compliant commercial space.

Do you have an interesting topic or valuable insights to share with fellow members, but are unsure how to communicate your message? I would be happy for you to contact me, Chloe Miller, to discuss how I can assist with elevating your content, and engaging with the local business community.

[Image source: Deposit photos]