Commercial Property Insurance: Common Exclusions To Keep In Mind

An insurance policy tells you what is covered. The exclusions tell you what is not. A gap between what you think is covered and what actually is can mean the difference between a claim paid and a claim declined.

Insurance exclusions exist for a reason. Insurers use them to manage risk, control costs, and keep premiums affordable. But the outcome is that many commercial property owners believe they're covered when they're not. The exclusions section is often the longest and hardest-to-read part of a policy, which is why it's easy to miss what's actually excluded.

This guide walks through common themes in commercial property insurance exclusions,  patterns you'll see across different types of cover and different insurers. Understanding these patterns helps you ask smarter questions before you buy, rather than having unwelcome surprises after a loss.

By the end of this guide, you'll know what to look for when you review a policy, and what to ask a broker about the gaps that matter to your business.

General Disclaimer

This is general information about common insurance exclusions, not personal advice. Exclusions vary between insurers and policies. Always check your specific policy wording and speak to a broker before making assumptions about what you're covered for.

Common Themes in Commercial Property Insurance Exclusions

Insurance exclusions follow certain patterns. Understanding these patterns helps you ask the right questions of your broker, regardless of which type of cover you're buying.

Wear, Tear, and Gradual Deterioration

Most policies exclude slow, progressive damage: decay, rot, rust, corrosion, fading, weathering, dampness, mould, and general deterioration over time. The distinction between a sudden loss and gradual damage can be unclear in practice. A roof that leaks slowly over months and causes internal damage might not be covered, whereas storm damage to the roof that leads to acute flooding could be. The line between these can be surprisingly blurry, and it's often where disputes arise.

Similarly, maintenance and repair costs are usually excluded. Insurance protects against accidental loss, not the cost of upkeep. A boiler that fails because it hasn't been serviced might not be covered; a boiler damaged by accidental fire would be.

Property Condition and Occupancy

Insurers often exclude or limit cover where the property condition falls below an expected standard, or where it's unoccupied, unlet, or unfit. An empty building between tenants presents higher risk of theft and deterioration. Policies might exclude damage to a property that's been empty for more than 30 or, 60 days. If you own buildings that are vacant, you'll need to notify the insurer and possibly arrange additional cover.

Similarly, lack of reasonable maintenance can trigger claim denials. The insurer's view is that if you could have prevented the damage through basic upkeep, it's not their responsibility.

Environmental and Geographic Risks

Certain perils (flooding, subsidence, heave, ground instability), are common in specific areas and are often excluded or heavily loaded. An insurer might offer no cover for flooding, or require proof of flood defences before they'll include it. Subsidence is similar: common in certain soils and mining areas, often excluded or conditional on survey.

These risks are area-dependent and vary between insurers. A property in a flood zone might struggle to find cover at any price. A broker can help identify insurers willing to cover the specific risks in your location.

Verification and Evidence

Losses that are hard to prove or quantify are often excluded or subject to strict conditions. Mysterious disappearance (stock that's gone but you don't know how) is often excluded because without evidence, the insurer can't rule out fraud or loss. Theft by people with legitimate access to the property (staff, visitors) is sometimes excluded unless you can show they forced entry.

Documentation matters. Stock counts, maintenance records, photos, and proof of loss all strengthen a claim. A broker can advise on what records you should keep.

Contractual and Deliberate Acts

Liability for losses you've agreed to take on in a contract, beyond what the law would normally require, is often excluded. If a venue hire agreement says you're liable for any damage to the venue regardless of fault, standard liability won't cover that. You'd need contractual liability cover, which costs more.

Deliberate or intentional acts are usually excluded absolutely.

Specialist Activities

Certain trades and activities are too risky for standard policies: asbestos removal, fireworks handling, high-hazard construction, high-risk lifting. Insurers manage exposure by declining them entirely. If you're in a high-risk trade, you'll need specialist cover.

Items and Circumstances Not Covered

Many policies use a named-peril approach rather than "all risks": they cover fire, theft, and storm, for example, but not accidental damage. This is cheaper, but it means anything not named is excluded. You only know what's covered by reading the policy.

Some items fall outside standard cover: money in transit (needs separate cover), goods while being moved (needs transit insurance), professional indemnity (a separate product entirely).

What These Exclusions Mean in Practice

The key point: different insurers have different appetites for risk, and they manage that appetite through exclusions. One insurer might exclude flooding; another might cover it for a loading. Some will cover subsidence only if you've had a survey; others won't touch it.

This means two policies with the same name, commercial property insurance, can look very different when you read the small print. The exclusions are where the differences lie.

How Exclusions Can Sometimes Be Changed

Some exclusions or restrictions may be negotiable, depending on the insurer, the property and the circumstances. In certain cases, additional cover may be available for an extra premium or subject to specific conditions, but this is not guaranteed.

• Flooding - Additional flood cover may be available in some circumstances, subject to the insurer's assessment of the risk.
• Accidental damage - Buildings and contents cover may be extended to include accidental damage where the insurer offers this option.
• Subsidence - Cover may be available depending on the property's location, history and the insurer's assessment of the risk.
• Unoccupied properties - Specialist insurance is available for properties that are empty for extended periods.
• Contractual liability - Additional cover may sometimes be available, depending on the nature of the contractual obligations and the insurer's terms.

The important point is to discuss any unusual risks or coverage requirements with a broker before a loss occurs. Once a claim has arisen, an exclusion or policy condition may prevent the insurer from covering it, and it may be too late to arrange additional cover for that particular event.

A Practical Checklist: What To Ask About

Before you buy any commercial property insurance, ask your broker:

• Buildings: Am I covered for flooding, subsidence, and accidental damage? What's the maximum excess? What happens if the building is empty?
• Contents: Am I covered for theft by staff, mysterious disappearance, goods in transit? What counts as "stock" and what counts as "equipment"? Is there an underinsurance penalty?
• Liability: Do I have employers' liability? Am I covered for contractual liability? Is there professional indemnity if I give advice? What's my limit of cover?
• General: What happens if I don't maintain the property to a reasonable standard? Are there any conditions I need to meet to keep the policy active?
• Can any exclusions be removed? If so, what would it cost?

Don't assume. Ask. A broker's job is to read the small print and flag gaps before you need to claim.

Exclusions Are Why You Need A Broker

Commercial property insurance is complex. Policies vary, exclusions differ between insurers, and what sounds simple ("buildings insurance") actually has dozens of conditions and exceptions attached.

The difference between a policy that pays your claim and one that doesn't often comes down to the fine print. A broker reads the fine print before you need to claim. They ask the hard questions, find gaps in your cover, and help you decide which exclusions matter and which don't.

Ellis David has over 50 years of experience helping commercial property owners and occupiers across London and the UK understand their insurance policies. We work with over 100 UK insurers and MGAs, which means we aim to find cover that fits your needs, even if your business or property is high-risk or has specific requirements.

We don't just give you a policy. We take time to explain what's covered, what's excluded, and what those exclusions actually mean for your business.

Speak to us about commercial property insurance and what's really covered.

Common Exclusions: FAQs

If my insurer won't cover something because of an exclusion, can I get cover elsewhere?

Sometimes. Different insurers have different appetites for risk. One insurer might exclude flooding; another might cover it for a loading. A broker knows which insurers will cover what, and can shop around for you. But there are some risks, very high-risk trades, for example, that no mainstream insurer will touch.

Can I remove exclusions from a standard policy?

Often, yes, but it costs extra and sometimes significantly. It depends on the risk. A broker can tell you what's worth extending and what's not, based on your business.

What if the insurer's exclusion seems unfair?

Commercial insurance is negotiated. You have rights, but they're not the same as consumer insurance rights. If you genuinely believe an exclusion is unfair or misrepresented, you can complain to the insurer, then to the Financial Ombudsman Service if you’re a small business or micro-enterprise. But the best time to address this is before you buy, not after a claim is declined.

Do I have to understand every exclusion?

No, but you should understand the main ones. What's not covered, what conditions you need to meet, and what would happen if you made a claim. A broker should be able to walk you through the exclusions in plain English, not policy wording.

If my previous broker didn't explain an exclusion and I've now had a claim declined, can I get compensation?

Possibly. If the broker was negligent in advising you (didn't warn you of a gap, for example), you might have grounds for a complaint or a claim against them. You'd need to seek legal advice. This is another reason to work with a broker who takes time to explain what's covered and what isn't.