03/06/2026
Underinsurance is an increasingly common problem. Recent data shows that in 2025, 70% of UK properties were insured for less than their true rebuild cost. In fact, the average home is only covered for 66% of the amount required to completely rebuild it. This means that, in the event of a major claim, many policyholders could face reduced payouts, leaving them to cover a significant shortfall themselves.
The ‘average clause’ explained
A rise in extreme weather has highlighted the risks of leaving your property underinsured. Homeowners have made claims for fires, flooding and escape of water, only to discover that their cover was insufficient. In these circumstances, an insurer can apply the ‘average clause’ - this reduces the claim settlement in proportion to the level of the policyholder’s underinsurance. For example, if a property is covered for 66% of its true rebuild cost, the insurer might only cover 66% of the claim.
One of the main causes of underinsurance is a lack of understanding about how to calculate rebuild costs. Many mistakenly insure homes based on the property’s market value, however, the rebuild cost is the price of reconstructing the whole property from scratch which could be significantly more as it includes materials, labour, debris removal etc.
Outdated valuations are another cause. Building and labour costs have risen in recent years, so rebuild costs are estimated to be 35% to 40% higher than in 2020.
Check your rebuild cost and ensure your policy reflects any home improvements to help ensure you have the right level of cover. If you’re unsure whether your insurance is still adequate, now is the time to seek professional advice. Get in touch to make sure you’re fully protected and avoid an unwelcome surprise if you ever need to make a claim.
Sources:
https://www.covermagazine.co.uk/news/4524648/protection-ranks-lowest-importance-homebuyers
https://www.insurancebusinessmag.com/uk/news/property-insurance/report-majority-of-uk-properties-were-underinsured-in-2025-560941.aspx
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