Building Insurance Valuation: Are You Covered for the True Cost of Repairs?
Thousands of homeowners, landlords, letting agents, and commercial property owners across the UK are unknowingly underinsured. When disaster strikes — whether it's a fire, flood, storm, or escape of water — they discover too late that their building insurance valuation doesn't reflect the true cost of restoring their property.
What Is Building Insurance Valuation?
Building insurance valuation — sometimes called the "sum insured" — is the figure your insurer uses to calculate your premium and, critically, the maximum amount they will pay out in the event of a total loss or major damage claim. It is not the same as the market value of your property. It represents the rebuild cost: the cost of demolishing what remains and rebuilding the property from scratch, including materials, labour, professional fees, and VAT.
Many property owners set this figure when they first take out their policy and never revisit it. Over time, as construction costs rise — particularly following recent supply chain pressures and inflation in the building materials market — the gap between the insured sum and the actual rebuild cost can widen significantly.
Why Underinsurance Is a Serious Problem
If your property is underinsured, your insurer may apply what is known as the "average clause" or "condition of average." This means that if your property is insured for, say, 70% of its true rebuild cost, your insurer may only pay 70% of any claim — regardless of the actual damage. For a £50,000 property insurance repair claim, that could mean a shortfall of £15,000 or more that you would have to fund yourself.
This is not a theoretical risk. The Building Cost Information Service (BCIS) estimates that a significant proportion of UK residential and commercial properties are underinsured, often by 20–40%.
How to Get an Accurate Building Insurance Valuation
The most reliable way to establish an accurate rebuild cost is to commission a professional reinstatement cost assessment (RCA) from a qualified chartered surveyor. This takes into account the specific construction type, age, materials, and features of your property — factors that online calculators and rule-of-thumb estimates often miss.
For listed buildings, properties with non-standard construction, or commercial premises, a professional assessment is particularly important. The rebuild cost of a Victorian terrace with original features, for example, can be substantially higher than a modern equivalent of the same floor area.
Getting a Building Repair Quote for Your Insurance Claim
When you make a property insurance claim, your insurer will appoint their own loss adjuster to assess the damage and determine the cost of repairs. However, the loss adjuster works for the insurer — not for you. Their assessment may not reflect the true cost of restoring your property to its pre-loss condition using appropriate materials and qualified tradespeople.
This is why it is strongly advisable to obtain your own independent building repair quote for your property insurance claim. A professional quote from a specialist insurance repair contractor will:
- Provide an accurate, itemised breakdown of all works required
- Identify damage that the insurer's assessor may have overlooked
- Ensure like-for-like reinstatement using appropriate materials
- Give you a credible basis for negotiating with your insurer
- Support your claim with professional, documented evidence
Who Needs to Think About This?
Building insurance valuation is relevant to all property owners — not just homeowners. Landlords, letting agents managing portfolios, and commercial property owners all face the same risk of underinsurance. For landlords in particular, the consequences of an underinsured claim can be severe: not only is the property out of action during repairs, but a shortfall in the insurance payout can make full restoration financially unviable.
How RM Assist Can Help
At RM Assist, we provide professional insurance repair quotes for all types of property damage — from flood damage repairs and fire and smoke damage repairs to storm damage, water damage, and impact damage. Our quotes are prepared by experienced specialist repair contractors and are designed to support your insurance claim with accurate, credible evidence.
If you are concerned that your insurer's assessment is too low, or if you simply want the reassurance of an independent professional opinion, contact our team today. Our service is available to homeowners, landlords, letting agents, and commercial property owners across the UK — and in many cases, our fees are recoverable as part of your insurance claim.