Sustainability, Safety & Compliance.

Sustainability and safety obligations have moved from reputational considerations to hard inputs in valuation, lending and leasing. A building that cannot be let, cannot be financed on standard terms, or cannot be occupied without further works carries a discount that is now explicit in pricing rather than implied.

Three separate regimes bear on most assets: energy performance and minimum standards, building safety regulation for higher risk residential buildings, and the wider reporting expectations that institutional capital applies to its own portfolios. They operate independently but converge on the same practical question, which is how much capital an asset needs before it is genuinely institutional quality.

Minimum energy efficiency standards restrict the ability to let sub standard property. The current minimum for most non-domestic lettings is EPC E. In June 2026, the government confirmed its intention to require EPC B from 2031 for privately rented buildings over 1,000 square metres where cost effective, while smaller buildings remain subject to EPC E. The previously proposed EPC C milestone for 2027 will not proceed.

How to underwrite the trajectory

• Establish the current certificate rating, its expiry, and the assumptions behind it
• Model the works required to reach the standard likely to apply during the intended hold period
• Test whether those works can be delivered within lease events, or whether vacancy is required
• Price the works against the rental and yield benefit they unlock, not only against the compliance floor
• Consider the exit buyer profile, since institutional purchasers apply the strictest tests

The gap between compliant and best in class stock is where much of the current rental premium sits. Meeting the minimum protects lettability, but it does not by itself deliver the pricing achieved by genuinely efficient buildings.

The decision between upgrading and rebuilding used to be answered purely on cost and value. It is now answered on cost, value, carbon and planning acceptability together, and the balance has shifted meaningfully toward retention where the existing structure is sound.

Figures are illustrative and vary by building type and specification. The point they make is durable: new build buys the best operational performance at the highest embodied cost, and where planning policy weighs embodied carbon, that trade off becomes a consent risk as well as a financial one.

For higher risk residential buildings, the safety regime introduced a sequenced approval process with defined duty holders and a requirement to maintain building information through the whole life of the asset. It has changed programme, cost and risk allocation on tall residential schemes.

The structure of the regime

• Gateway one, at planning stage, requiring fire safety information to accompany the application for relevant buildings
• Gateway two, before construction starts, requiring regulator approval of the design and the competence of the duty holders
• Gateway three, before occupation, requiring the as built information and the golden thread to be handed over
• Duty holder roles allocating accountability across client, principal designer and principal contractor
• The golden thread of information, maintained digitally through design, construction and occupation

The practical effect is that design must be resolved earlier and changed less often. Late design change is expensive because it can require re approval, and programmes that assume conventional flexibility during construction have consistently overrun. Development appraisals for in scope buildings should carry explicit contingency for approval periods rather than treating them as administrative.

Compliance capital is best planned against events rather than dates. Works land most efficiently when they coincide with a void, a refurbishment already committed, or a refinancing that requires an improved position anyway.

Triggers worth planning around

• Lease events, where a void creates the only practical window for disruptive works
• Refinancing, where lenders test compliance trajectory over the term of the facility
• Disposal preparation, where a buyer will otherwise price the works into their bid at a discount
• Regulatory deadlines, where a building becomes unlettable rather than merely unattractive
• Occupier requirements, where corporate reporting obligations shape the space a tenant can take

Where a hold period contains no natural trigger, the question becomes whether the asset should be held at all. An owner who cannot fund the required works within the hold is effectively deferring a discount to the exit, and that discount usually exceeds the cost of the works.

Compliance questions are technical, but the decisions they drive are commercial. The value of advice sits in translating a survey or an assessment into a capital plan, a disposal strategy, or a negotiating position with a lender or an occupier.

Practical steps that consistently pay back

• Commission condition and energy assessments before, not after, agreeing a price or a lease renewal position
• Build the compliance trajectory into the appraisal on day one so the exit assumption is defensible
• Align works programmes with lease expiries to avoid paying twice for access and disruption
• Document the golden thread properly on in scope buildings, since incomplete information delays occupation
• Test with your funder how compliance position affects margin and covenant before committing to a structure

Owners who treat these obligations as a scheduled part of asset management rather than as an interruption tend to hold better assets, refinance on better terms, and meet a wider buyer pool on exit.