MEES, EPC Ratings and the Risk of Stranded Commercial Assets

Minimum Energy Efficiency Standards (MEES) are no longer just a compliance check.

In 2026 they have become a structural influence on lettability, financing, tenant demand and long-term capital value across commercial property portfolios.

For years, EPC E has been treated as the threshold to reach and forget. If a building achieved the minimum rating required for lettings, the certificate was filed away and attention moved elsewhere.

That mindset is now increasingly risky.

Today landlords and investors are no longer asking:

“Are we compliant today?”

They are asking a far more strategic question:

“Will this asset remain lettable, financeable and competitive tomorrow?”

At the same time, occupier behaviour is changing. Tenants are increasingly assessing energy performance when selecting premises. Operational energy costs, ESG reporting requirements and future regulatory risk are now part of leasing decisions.

This is where MEES regulation, EPC ratings, occupier demand and stranded asset risk begin to intersect.

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Why EPC E Is No Longer Enough

Under current legislation, most commercial properties must achieve a minimum EPC rating of E to be legally let.

That remains the baseline requirement today.

However, policy signals and industry expectations point toward tighter minimum standards in the coming years, with many commentators expecting a future trajectory towards EPC C.

While the exact timeline remains uncertain, the direction of travel is clear: energy performance expectations are rising.

For landlords, this creates a structural challenge.

An E-rated building may be compliant today, but it could fall below future regulatory thresholds.

Waiting until legislation forces upgrades can create several problems:

• Capital works become reactive and more expensive
• Refurbishments may disrupt tenants or leasing plans
• Financing discussions increasingly include energy performance risk
• Asset value may be discounted during transactions

EPC E therefore represents minimum compliance, not long-term asset strategy.

Occupier expectations are accelerating change, increasing MEES EPC stranded asset risk for buildings that fail to meet efficiency standards.

Occupiers Are Driving the Shift Too

Regulation is only part of the story.

The demand side of the market is also evolving rapidly.

Occupiers increasingly consider energy performance when selecting premises, influenced by several factors:

• Rising operational energy costs
• Corporate sustainability targets
• ESG reporting obligations
• Future regulatory exposure

For many businesses, occupying a poorly performing building introduces uncertainty. Higher service charges, potential retrofit disruption and unclear compliance pathways can all become operational risks.

As a result, tenants are increasingly favouring buildings with stronger EPC ratings, even where the rental difference is modest.

In competitive markets, this shift can influence:

• Leasing velocity
• Length of void periods
• Tenant quality and covenant strength

Energy performance is becoming a leasing differentiator, not just a regulatory requirement.

Understanding Stranded Asset Risk

The concept of a stranded asset has moved from environmental policy into commercial property strategy.

A stranded asset is a building that becomes difficult to:

• Lease
• Finance
• Sell

without significant investment.

Low EPC ratings can expose buildings to exactly this risk.

Properties with poor energy performance may face:

• Future regulatory tightening
• Reduced tenant demand
• Increased scrutiny from lenders and investors
• Significant retrofit costs to remain compliant

The consequences extend beyond compliance. They affect capital value, liquidity and income stability.

In practical terms, a building that cannot attract tenants or financing without substantial investment risks becoming economically stranded.

Financing, Liquidity and Investor Scrutiny

Energy performance is now assessed alongside traditional property fundamentals.

During refinancing, acquisition or portfolio review, lenders and institutional investors increasingly consider:

• EPC rating
• Regulatory trajectory
• Capital expenditure requirements
• ESG risk exposure
• Tenant demand resilience

Buildings sitting close to regulatory thresholds may face additional scrutiny during due diligence.

In some cases this can lead to:

• Higher perceived risk
• Tighter lending terms
• Additional valuation adjustments
• Greater due diligence requirements

Conversely, assets positioned at EPC C or above are typically viewed as more resilient against regulatory tightening.

Energy performance has therefore become a valuation and liquidity consideration, not just a compliance metric.

The green value gap is widening, increasing MEES EPC stranded asset risk for buildings that fall behind efficiency standards.

Evidence of the “Green Value Gap”

Research across the commercial property sector increasingly supports the idea of a “green value gap” between efficient and inefficient buildings.

Several studies highlight this emerging trend.

Research from JLL suggests buildings with strong sustainability credentials can achieve rental premiums of 6–11%, while inefficient buildings may suffer a “brown discount”.

Analysis by CBRE indicates that energy-efficient offices can achieve sale price premiums of over 10%, while lower-rated buildings may face longer marketing periods.

Data from MSCI shows that inefficient assets are increasingly screened out by some investors, creating growing liquidity risk for poorly performing stock.

While results vary by market and building type, the underlying trend is consistent: energy performance is influencing property value.

EPC Ratings and the Transaction Process

EPC ratings are now regularly examined during refinancing and transaction due diligence.

Advisers increasingly review:

• The EPC rating itself
• The age of the certificate
• Whether modelling relied on default assumptions
• Whether missing evidence could improve the score

Buildings that sit close to regulatory thresholds may face:

• Additional technical review
• Capital expenditure allowances during negotiations
• Pricing adjustments to reflect improvement costs

Understanding the assumptions behind an EPC is therefore essential before refinancing, letting or sale.

Improving EPC Ratings Strategically

One of the biggest misconceptions around EPCs is that improving a rating automatically requires major refurbishment.

In practice, improvement strategies are often more nuanced.

Common interventions include:

• LED lighting upgrades
• HVAC optimisation
• Improved zoning and BMS controls
• Targeted fabric improvements
• Sub-metering upgrades
• Evidence verification to remove default modelling assumptions

In some cases, uplift comes not from physical works but from ensuring the EPC model accurately reflects the building’s true performance.

If key documentation is missing, software may apply conservative default values that suppress the rating.

Providing verified system data or updated modelling can sometimes produce a more accurate outcome.

The objective is not artificial uplift, but ensuring the certificate properly represents real building performance and long-term compliance strategy.

Strategic Planning for Landlords and Asset Managers

Forward-looking landlords are already responding to these trends.

Rather than waiting for legislation to force action, asset managers are beginning to integrate energy performance into portfolio strategy.

Typical steps include:

• Mapping EPC ratings across portfolios
• Identifying assets close to risk thresholds
• Reviewing modelling assumptions and certificate age
• Aligning improvement works with planned maintenance cycles
• Coordinating upgrades with tenant fit-outs or refurbishment programmes

This allows improvements to be delivered at the lowest cost and least operational disruption.

Buildings with stronger EPC ratings are typically easier to lease, finance and sell. Poorly performing assets may face growing stranded asset risk.

Have questions about MEES, EPC, or stranded assets? Get clarity on MEES EPC stranded asset risk with expert support.

Bottom Line

Energy performance is no longer a technical afterthought in commercial property.

It is increasingly influencing lettability, financing, asset value and long-term resilience.

Buildings with strong EPC ratings tend to:

• Attract higher-quality tenants
• Achieve stronger rents
• Access financing more easily
• Protect long-term capital value

Buildings with weaker ratings face the opposite:

• Greater regulatory risk
• Reduced marketability
• Potential future retrofit costs

For landlords and asset managers, the key question is no longer whether a building meets minimum standards today.

It is whether the asset will remain competitive, financeable and lettable over the next five to ten years.

If you are unsure where your building currently sits, start here:
https://weareinteb.co.uk/epc-quote/