Why Some Parts Of Your House May Be Underinsured & How To Fix It

Most homeowners assume their building insurance has them fully covered. You pay the premium, you have the policy, so you're protected, right? Not necessarily. Property underinsurance is one of the most common and costly problems in home insurance, and it affects far more people than you'd expect.

It’s estimated that around 80% of UK properties are underinsured. That's not a small number. It means the majority of homeowners could face a nasty surprise at the point of making a claim, whether that's a reduced payout, a disputed settlement, or in some cases, a declined claim altogether.

So, what's going wrong, and what can you do about it?

What Is An Underinsured House?

An underinsured house is one where the sum insured on your policy doesn't accurately reflect the true cost of rebuilding or replacing your home and its contents. It doesn't mean you have no cover. It means the cover you have isn't enough.

This matters because insurers calculate claim payouts against the sum insured. If there's a significant gap between what you've declared and what it would actually cost to rebuild, insurers may apply what's known as the "average clause." This means they can reduce your claim payout in proportion to how underinsured you are. So, if your home would cost £500,000 to rebuild but you've only insured it for £350,000, you may only receive 70% of any claim, even on a partial loss.

The Most Common Gaps In Home Insurance

Outbuildings And External Structures

Many homeowners don't realise that garages, garden studios, summer houses, and boundary walls are often not automatically included in a standard home insurance policy. If you've got a detached garage or a timber-framed home office in the garden and you haven't explicitly declared these, they're likely not covered.

Renovations And Extensions

If you've carried out a significant renovation since you last reviewed your policy, the rebuild cost of your property will have gone up, but your sum insured probably hasn't. Improvements that add floor space, premium materials, or specialist fittings can substantially increase what it would cost to rebuild your home from scratch, and a policy that hasn't been updated to reflect this is a policy that doesn't cover you properly.

High-Value Features

Period properties, listed buildings, and homes with original features such as ornate cornicing, bespoke joinery, or oak flooring can be significantly more expensive to rebuild than a standard property of the same size. The same applies to homes with Italian marble worktops, underfloor heating, or custom-fitted cabinetry.

Inaccurate Sums Insured

The rebuild cost of a property is not the same as its market value, and this is one of the most common sources of confusion. Market value includes the land, location, and demand. Rebuild cost is purely the cost of constructing the building. Using the wrong figure can lead to significant property underinsurance from day one.

What Happens If My House Is Underinsured?

So, what happens if your house is underinsured and you need to make a claim? The consequences vary depending on your insurer and the scale of the gap, but the main risks are:

• Your claim is paid out at a reduced amount due to the average clause being applied.
• Your insurer disputes the claim on the basis of non-disclosure or inaccurate information.
• You're left covering a significant portion of the repair or rebuild costs yourself.

How To Fix It: Practical Steps To Close The Gap

The good news is that property underinsurance is fixable. Here's where to start:

• Get a proper rebuild valuation. The most reliable way to establish the correct sum insured for your buildings is to commission a professional rebuild assessment from a chartered surveyor.
• Review your policy after any changes. Any renovation, extension, or significant improvement to your home should trigger a policy review.
• Declare everything. Outbuildings, external structures, home offices, and high-value features all need to be explicitly included. If you're not sure whether something is covered, ask.
• Check your contents sum insured too. Contents underinsurance is just as common as buildings underinsurance. If you've accumulated valuable items, made significant purchases, or inherited anything of value, make sure your contents cover reflects this.
• Work with a specialist broker. A specialist broker can review your current cover, identify gaps, and ensure your policy accurately reflects your property and its features.

Don't Wait Until You Need To Claim

The problem with property underinsurance is that you often don't discover it until something goes wrong. By that point, it's too late to fix it.

Taking the time to review your cover now, before a loss occurs, is the simplest and most effective way to protect yourself.

If you're not sure whether your current cover is adequate, request a callback and speak to a member of our team today.