Why Underinsurance Is a Major Risk for Commercial Property Owners

Item: Ellis David
Rating: 4.7
Author: kian@digitalnrg.co.uk

For commercial property owners, protecting your investment goes far beyond simply having an insurance policy in place. One of the most common – and costly – mistakes made across UK commercial properties is underinsurance.

While it may seem like a way to reduce premium cost, underinsuring your commercial properties can leave you significantly out of pocket when you need to make a claim. In this guide, we explain what underinsurance is, why it happens, and how to ensure your insurance coverage truly protects your business and assets.

What Is Underinsurance?

Underinsurance occurs when the sum insured on your insurance policy is lower than the actual insured value or true rebuild cost of your property.

In simple terms, if your building is insured for less than it would cost to fully rebuild or repair, you are underinsured.

This is a widespread issue affecting many commercial property owners across the UK, particularly those who rely on outdated valuations or confuse market value with rebuild costs.

Market Value vs True Rebuild Cost

One of the main causes of underinsurance is misunderstanding the difference between market value and true rebuild cost.

Market value reflects what your property could sell for in the current market
True rebuild cost reflects what it would actually cost to rebuild the buildings from scratch

Rebuild costs include:

Labour costs
Materials and construction expenses
Professional fees such as architects and engineers
Debris removal and site clearance

For many properties, especially older or complex structures, the rebuild cost can be significantly higher than the market price.

Why Underinsurance Is So Risky

At first glance, underinsuring your property might seem like a way to save money on premiums. However, the risks far outweigh any short-term savings.

The Average Clause

Most insurers apply something called the average clause when a property is underinsured.

This means that if your insured amount is lower than the actual value, your claim amount will be reduced proportionally – even if the loss is only partial.

Let’s say:

Your building’s true rebuild cost is £1,000,000
Your sum insured is £500,000 (50% of the actual value)
You suffer damage costing £200,000

Because you are 50% underinsured, your insurer may only pay 50% of the claim – leaving you with a £100,000 shortfall.

This is known as an average shortfall, and it can have serious financial consequences for owners and businesses alike.

The Impact on Business Operations

Underinsurance doesn’t just affect your ability to repair your buildings – it can also disrupt your entire business operations.

If a major event such as a fire or flood occurs, the consequences may include:

Delays in completing repairs due to insufficient funds
Extended business closure
Loss of revenue
Difficulty meeting obligations to a tenant or clients

Without adequate business interruption cover linked to accurate valuations, the financial strain can be severe.

Why Underinsurance Is Increasing

In recent years, underinsurance has become more common across UK commercial properties due to several external factors.

Rising Labour and Material Costs

Increases in labour costs and material prices have significantly impacted rebuild costs. If your insurance policy hasn’t been updated, your insured value may no longer reflect reality.

Supply Chain Disruption

Ongoing supply chain disruption and supply chain issues have led to potential delays and increased construction costs, further widening the gap between your insured amount and actual rebuild costs.

Inflation and Market Changes

Changes in the market, inflation, and evolving construction standards all affect the price of rebuilding commercial premises.

Many policies set last year may already be outdated.

The Risks for Landlords and Property Owners

For property owners, particularly landlords, underinsurance presents additional challenges.

If your commercial property owners insurance is inadequate, you could face:

Reduced payout following a claim
Inability to fully restore your investment
Loss of rental income from tenant vacancies
Increased financial pressure during recovery

For mixed-use or residential and commercial buildings, the risks can be even greater due to the complexity of rebuild requirements.

Legal and Financial Responsibilities

While having insurance itself is not always a strict legal requirement, many lenders require adequate cover as part of a commercial mortgage agreement.

As a responsible owner, ensuring your insurance cover reflects the correct insured value is essential to:

Protect your investment
Meet lender conditions
Avoid disputes with insurers

Failing to do so could result in disputes over claim amount or delays in receiving your payout.

How to Avoid Underinsurance

The good news is that underinsurance can be avoided with the right approach.

1. Get Accurate Valuations

Regular valuations are key to ensuring your sum insured is accurate.

Professional chartered surveyors can provide detailed rebuild assessments that reflect current costs and risks.

2. Review Your Policy Regularly

Your commercial insurance policy should not be a “set and forget” document.

Carry out a review at least once a year, or whenever there are significant changes to your property, such as:

Renovations or extensions
Changes in business operations
New tenants or uses of the premises

3. Work With Specialist Brokers

Experienced brokers and insurance experts understand the complexities of commercial property owners insurance.

They can help you:

Calculate the right sum insured
Identify potential gaps in coverage
Compare options from different insurers

4. Factor in External Risks

Ensure your policy reflects current external factors, including:

Inflation
Construction cost increases
Regional risks such as flood exposure

This ensures your insurance coverage remains suitable in the future.

The True Cost of Getting It Wrong

The real cost of underinsurance is not the premium – it’s the financial exposure when something goes wrong.

An insufficient sum insured can result in:

Significant out-of-pocket expenses
Delays in rebuilding your property
Long-term damage to your business
Loss of confidence from customers and stakeholders

In the worst-case scenario, it could even jeopardise your ability to continue trading. Consider a commercial property owner who insured their building based on an outdated valuation from several years ago.

Following a major fire, the actual rebuild cost was 40% higher than the insured value.

Due to the average clause, the insurer reduced the payout proportionally – leaving the owner to fund a substantial shortfall.

The result?

Delayed rebuilding works
Loss of rental income
Ongoing financial strain

This is a common example of how underinsurance can quickly escalate into a major financial issue.

Why Accurate Insurance Matters

Ultimately, the purpose of commercial property insurance is to protect your property, your business, and your financial future.

Ensuring your insured buildings reflect their true rebuild cost allows you to:

Recover quickly after a loss
Avoid unexpected financial burdens
Maintain stable business operations
Safeguard your long-term investment

Accurate valuations and the right sum insured are the foundation of effective protection.

Protect Your Commercial Property with Ellis David

Underinsurance is one of the biggest hidden risks facing commercial property owners in the UK today. While it may not be immediately visible, the consequences can be severe – particularly when it comes to reduced claim payouts and unexpected financial shortfalls.

By understanding the difference between market value and rebuild cost, carrying out regular valuations, and working with experienced brokers, you can ensure your insurance coverage remains accurate and effective.

The key is simple: insure your property for what it would truly cost to rebuild: not what it might sell for.

At Ellis David, we specialise in helping commercial property owners secure the right insurance coverage for their needs. Our team works with leading insurers to ensure your sum insured reflects accurate rebuild costs – helping you avoid the risks of underinsurance.

If you’re unsure whether your current policy provides the protection you need, now is the time to act.

Get in touch with Ellis David today to request a quote and make sure your commercial property is properly protected for the future.

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Why Underinsurance Is a Major Risk for Commercial Property Owners

What Is Underinsurance?

Market Value vs True Rebuild Cost

Why Underinsurance Is So Risky

The Average Clause

The Impact on Business Operations

Why Underinsurance Is Increasing

Rising Labour and Material Costs

Supply Chain Disruption

Inflation and Market Changes

The Risks for Landlords and Property Owners

Legal and Financial Responsibilities

How to Avoid Underinsurance

1. Get Accurate Valuations

2. Review Your Policy Regularly

3. Work With Specialist Brokers

4. Factor in External Risks

The True Cost of Getting It Wrong

Why Accurate Insurance Matters

Protect Your Commercial Property with Ellis David

Ellis David Limited is authorised and regulated by the Financial Conduct Authority.

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152-154 Essex Road, London, N1 8LY

020 7354 3881

enquiries@ellisdavid.com

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