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Risk management ... Underinsurance and inflation

The impact of rising building costs on insurance

Risk management ... Underinsurance and inflation
Claire Attenborough, Principal Risk Management Surveyor at Ecclesiastical, describes how global challenges are causing building costs to continue to rise and how this is impacting levels of underinsurance.

Rising rebuild costs mean some organisations could discover too late that their insurance cover is no longer sufficient.

Global events, including the conflict in the Middle East and the war in Ukraine, are having a significant impact on construction costs. The Strait of Hormuz in particular is impacting the cost of energy as it handles a substantial amount of the World's oil. The knock-on impact is:

  • Increased manufacturing costs for energy-intensive products

  • Increased costs for imported goods

  • Longer delivery routes causing delays.

As an island nation that relies heavily on imports, the UK is more vulnerable to the impacts. As a result, inflation may remain higher for longer in the UK, particularly if the conflict continues1.

Couple this with labour availability, caused by skills shortages an aging workforce, wage pressures, and BCIS has forecast that building costs will increase by 13.1% over the next five years 2.

How rising costs put people and businesses at risk

According to industry data, 71% of commercial properties and 68% of residential properties in the UK are underinsured3. This has always been an issue and properties can be underinsured for a number of reasons, but the problem is exacerbated by rising costs.

Insurance won’t cover the full cost of a rebuild for an underinsured property, leaving policyholders exposed. The top five property types most likely to be underinsured are:

  • Nursing homes and care homes

  • Health centres and surgeries

  • Public houses, licensed premises and hotels

  • Offices

  • Schools/education3

If rebuilding costs continue to increase, organisations that have not reviewed their cover recently could face a shortfall in the event of a major property claim.

What happens in the event of a claim?

Here’s how that could work in practice.

If the property is underinsured, the policyholder may be required to fund some of the repairs themselves. This may have less impact if the claim is small, but if it runs into tens of thousands of pounds, the financial impact could be much harder to manage.

As an example, say the cost to rebuild a property is £500,000 but the sums insured are set at £250,000, or 50% of the value at risk. Any claim would be settled at half of its value. In this case, a total loss could result in a payment of only £250,000, while a partial loss of £100,000 might result in a settlement of only £50,000. This is known as the application of average, where the insurer may reduce the claim payment in proportion to the level of underinsurance.

Failure to make allowance for extensions or significant refurbishments, additional costs associated with debris removal or difficult access, the inclusion (or otherwise) of VAT can all add to the problem.

What should buildings sums insured cover?

There may be several reasons why a building is left underinsured. It’s a common misconception that the market value of the property is a suitable level of cover. The market value is determined by many factors, but it is just the amount that a buyer is willing to pay for it.

What is needed is the cost to rebuild in the same manner, including:

  • Debris removal

  • Outbuildings, walls, fences, hardstanding

  • Professional fees

  • Compliance with current Building Regulations

  • Any extensions or significant refurbishments

  • Location and access constraints

  • VAT

It’s worth seeking expert advice and reviewing figures regularly to make sure sums insured remain accurate. Historic buildings are especially difficult to value, so it’s even more important to seek guidance from heritage specialists when setting building sums insured.

Tracking building costs

Once an accurate sum insured is set, it is important that this is reviewed and kept up to date, taking into consideration the (construction) market conditions and inflation. An insurance policy is usually index-linked or protected against inflation by a general uplift.

In addition to the commonly available indices provided by the Building Cost Information Service (BCIS), Ecclesiastical has partnered with BCIS to build an exclusive index (the Ecclesiastical Heritage Index) to keep the sums insured for historic buildings up to date. No index can guarantee to keep figures up to date indefinitely, so it is important to revisit the rebuild cost at least every five years, or sooner if there have been significant alterations.

Underinsurance doesn’t just apply to buildings but also to contents, stock and business interruption insurances too. Taking information from annual accounts will lead to incorrect figures, so it is important to be aware of how the sums insured should be calculated.

Planning for strategic challenges

Beyond buildings insurance, rising costs also highlight the importance of wider resilience planning. Effective risk management extends beyond insurable risks to factors like climate change, operational disruption, supply chain resilience changing stakeholder expectations and regulatory change.

A strong approach to strategic risk management and business continuity can help organisations understand and manage these wider risks by identifying actions that strengthen resilience.

Want to know more?

If you're unsure if your building sums insured is adequate, it's best to check with your broker or insurer about reviewing your cover or arranging a professional valuation.

Ecclesiastical has an established in-house team of surveyors trained to deliver insurance building valuations for customers, subject to eligibility criteria. Our valuations reflect the factors detailed above and are based on cost information derived from many years' experience insuring and valuing a wide portfolio of buildings ranging from the medieval to modern era.

Where a policy is subject to the condition of average, if we have completed a building valuation which you have accepted or if we accept any other professional valuation provided by you and we have applied an average waiver to the policy, average will not be applied in the event of an insured loss.

The valuation must have been completed no more than 5 years prior to an insured loss, completed in respect of the building to which loss has been sustained and adjusted to reflect building alterations and the effects of inflation in the intervening period.

If you have questions, speak to your usual Ecclesiastical contact or broker. Ecclesiastical customers can also contact us via the risk advice line.

Risk advice line

For specific questions, contact your Risk Management Surveyor or Consultant:

0345 600 7531

9am to 5pm, Monday to Friday (excluding bank holidays)

Email us Find out more

Risk Management – Customer Opinion Results 2025, responses from 138 customers

Claire Attenborough
Principal Risk Management Surveyor

Claire has worked in insurance for over 30 years, starting in Claims and progressing through several roles, including Insurance Consultant and Risk Management Surveyor.

Claire is a Principal Risk Management Surveyor at Ecclesiastical, responsible for Valuation and Property matters, as well as research, development, and training in these areas.

In addition to ACII, Claire has the NEBOSH National General Certificate. She plays an active role in the CII, both nationally and locally.

1 How the Iran conflict is reshaping the outlook for UK construction, BCIS June 2026

2 Construction Industry Forecast | BCIS, July 2026

3 RebuildCostAssessment.com, data from assessments of more than 29,000 UK residential and commercial properties, 2025

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