The Policy Schedule Is Not the Valuation: Reinstatement Costs in 2026

The policy renews, the schedule is signed, and the sum insured is carried forward with a modest indexation uplift. It is a familiar sequence in UK commercial property management, and it is one of the quietest ways a portfolio can acquire a material balance sheet risk. A sum insured is an estimate of what it would cost, today, to reinstate the property to its pre-loss condition, including the professional and regulatory costs that rebuilding now attracts. It is not an open market valuation, not a book value, and not a figure that can safely be inherited from a previous schedule.

Why the gap opens

Underinsurance rarely arrives through a single error. It accumulates. Construction pricing moved sharply between 2021 and 2023, and although headline inflation has since moderated, the accumulated shift remains embedded in tender prices, labour rates and mechanical and electrical packages. A building insured on a pre-pandemic figure with a flat annual uplift may still sit well short of what a 2026 rebuild would actually cost.

Regulation adds a second layer. The Building Safety Act 2022 and the associated changes to fire safety expectations, sprinkler thresholds and evidence requirements have altered what a compliant rebuild looks like. Energy performance obligations for let property and the direction of travel on thermal standards push specification upwards. The practical consequence is that reinstatement frequently means rebuilding to a standard better than the one that existed before the loss, and the policy wording generally anticipates exactly that.

A third factor is structural: the sum insured is often owned by whoever handles insurance renewal, while knowledge of alterations, plant replacements and specification changes sits with asset management or projects. The two do not always meet.

What the regulations have added to the bill

Where a loss triggers a rebuild, the reinstated building must satisfy the requirements in force at the time of reconstruction. That can mean upgraded fire compartmentation, additional escape provision, enhanced sprinkler coverage, improved thermal performance and modern accessibility. None of these are optional extras, and none are captured by applying an index to an old figure.

There is also the question of what sits around the building. Site clearance, demolition of surviving structure, temporary works, asbestos removal and professional fees are all real costs that a claim will attract. Insurers often apply sub-limits to some of these heads, which is why the schedule should be read alongside the assessment rather than instead of it.

Commissioning an assessment that will hold up

A Reinstatement Cost Assessment should be prepared by an appropriately qualified chartered surveyor, typically through the RICS, with demonstrable experience of commercial reinstatement and access to cost benchmarking data such as the BCIS service. A desktop opinion produced without a site inspection has its place for simple or low-value assets, but it should be a conscious choice rather than a default.

The brief matters more than many clients expect. It should record the basis of measurement, the assumed specification, site access constraints, and whether the figure includes demolition and debris removal, professional fees, contingency and VAT. It should state the date to which costs are current and the index used. It should also confirm whether the assessment is on a day-one basis, which is the basis most property policies assume.

For a multi-let building, the assessor needs to understand the demise boundaries and any tenant-specific fit-out that the landlord is obliged to reinstate. For older stock, listed status, conservation area constraints and the presence of asbestos will all affect both cost and programme, and both should appear in the report's assumptions.

The evidence insurers and loss adjusters look for

When a claim is presented, the loss adjuster will ask a small number of direct questions. When was the assessment prepared? By whom, and on what professional basis? What did it assume, and does the current building still match those assumptions? A dated report with a clear methodology, benchmark evidence, drawings and a written record of assumptions answers those questions efficiently and reduces the scope for dispute.

The Insurance Act 2015 places a duty of fair presentation on the insured, and while a formal assessment is not mandated, it is strong evidence of the disclosure a commercial policyholder is expected to make. In a contested claim, its absence tends to be noticed.

Two policy mechanics deserve particular attention. The first is the average clause, under which a partial loss is reduced in proportion to the shortfall in the sum insured. A building insured at seventy per cent of its true reinstatement cost does not simply suffer a shortfall on a total loss; it suffers a proportionate reduction on every claim. The second is the indexation provision: check which index is applied, whether it reflects the property type and region, and whether it is applied to a base figure that was itself accurate.

Keeping the figure current

Annual indexation is a mechanism for tracking movement between assessments, not a substitute for assessment. A sensible rhythm for most commercial portfolios is a full reinstatement assessment every three years, refreshed earlier where a trigger event occurs: a material alteration, a change of use, a significant upgrade programme, a portfolio acquisition, or a change in regulation that affects rebuild specification.

Ownership is the point at which good intentions usually fail. The assessment should sit with a named individual, be recorded in the asset register alongside the policy reference, and be reviewed as part of the renewal timetable rather than in the fortnight before inception. Brokers can only place cover on the information they are given, and a late instruction compresses the time available to correct a shortfall.

A short governance checklist

• Confirm the identity of the accountable owner for each asset's sum insured.
• Budget for a professional assessment rather than relying on indexation alone.
• Brief the assessor in writing, including the basis, the scope and the date of costs.
• Read the policy schedule against the assessment, head by head.
• Record assumptions and retain supporting evidence with the asset file.
• Diarise the next assessment date and the events that would bring it forward.
• Share the output with the broker in good time before renewal.

The sum insured is a governance output, not a renewal formality. Funding a proper assessment is considerably cheaper than discovering, mid-claim, that the figure on the schedule described a building that no longer exists at a price the market has left behind.