Commercial property insurance covers the physical assets associated with your business premises — the building itself, the contents inside it, and any stock or fixtures and fittings. It provides financial protection against damage or loss caused by insured events such as fire, flood, storm, theft, and vandalism.
If your business owns, leases, or occupies commercial premises, property insurance is essential. For many businesses, it works alongside business interruption insurance and public liability insurance to form the core of a commercial insurance programme.
What Commercial Property Insurance Covers
A standard commercial property insurance policy covers physical loss or damage to insured property caused by specified perils or on an all-risks basis.
Specified Perils (Named Perils)
| Peril | Description |
|---|---|
| Fire | Including smoke damage |
| Lightning | Direct lightning strikes |
| Explosion | Including gas or boiler explosions |
| Storm and flood | Wind damage, rain, river or surface water flooding |
| Escape of water | Burst pipes, leaking tanks, or faulty plumbing |
| Theft | Forced entry or attempted theft |
| Vandalism | Malicious damage by third parties |
| Impact | Vehicle or aircraft impact with the building |
| Subsidence | Ground movement, heave, or landslip |
All-Risks Cover
An all-risks policy covers any cause of loss or damage unless it is specifically excluded. This provides broader protection than a named-perils policy. Common exclusions even under all-risks policies include:
- Wear and tear and gradual deterioration
- War, terrorism, and nuclear risks (terrorism can be added via Pool Re)
- Cyber events (increasingly excluded or limited)
- Pollution and contamination
- Mechanical or electrical breakdown (covered separately by engineering insurance)
Types of Cover
Buildings Insurance
Covers the structure of the building, including:
- Walls, roof, floors, and foundations
- Permanent fixtures (lifts, wiring, plumbing, heating systems)
- External areas (car parks, fences, gates, paths)
- Landlord’s fixtures (if you are the building owner)
The sum insured should reflect the rebuilding cost of the property (not the market value or purchase price). The rebuilding cost is the amount it would take to demolish the damaged structure and rebuild it to the same specification, including:
- Construction costs
- Professional fees (architects, surveyors, project managers)
- Debris removal
- Local authority compliance costs
Contents Insurance
Covers the movable property inside the building:
- Office furniture and equipment
- Computer hardware and peripherals
- Machinery and tools
- Stock and raw materials
- Employee personal effects (limited cover)
Contents should be insured at replacement value — the cost of replacing items with new equivalents of similar specification.
Stock Insurance
Stock (goods held for sale, raw materials, work in progress) is often insured separately or as a specific section within the contents cover. The sum insured should reflect the maximum value of stock held at any time during the policy period.
Tenant’s Improvements
If you lease your premises and have made improvements (fitted a kitchen, installed partitions, decorated), these may not be covered by the landlord’s buildings insurance. Tenant’s improvements cover protects your investment in alterations and fixtures you have added to the property.
How Much Cover Do You Need
Calculating the Buildings Sum Insured
Underinsurance is one of the most common problems in commercial property insurance. If the sum insured is less than the rebuilding cost, the insurer may apply average (also known as co-insurance), reducing the claim payout proportionally.
Average example: If the rebuilding cost is £500,000 but you only insure for £250,000 (50% underinsured), the insurer will pay only 50% of any claim, even if the claim is below the sum insured.
To avoid this:
- Commission a professional rebuilding cost assessment from a chartered surveyor
- Update the sum insured annually to reflect construction cost inflation (use the BCIS index)
- Include an inflation provision in the policy (many insurers offer index-linking)
Calculating the Contents Sum Insured
List all contents and equipment at current replacement cost. Do not use the depreciated book value — insurance replaces items on a new-for-old basis (unless stated otherwise).
Key Policy Features
| Feature | Description |
|---|---|
| Excess | The amount you pay towards each claim (e.g. £250 to £1,000) |
| Index-linking | Automatic annual increase to the sum insured in line with inflation |
| Day-one basis | Sets a declared value and automatically provides cover up to 115% or 130% to protect against underinsurance |
| Glass cover | Replacement of plate glass, signage, and shop fronts |
| Terrorism cover | Available as an add-on via Pool Re (the government-backed terrorism reinsurer) |
| Unoccupied premises | Cover may be restricted or voided if the property is empty for more than 30-45 days |
Landlord vs Tenant Responsibilities
| Responsibility | Typically Landlord | Typically Tenant |
|---|---|---|
| Buildings insurance | Yes (included in service charge) | No (but check the lease) |
| Contents insurance | No | Yes |
| Plate glass | Depends on lease | Depends on lease |
| Tenant’s improvements | No | Yes |
| Public liability | For common areas | For demised premises |
Always check the lease to confirm which party is responsible for insuring each element. Some leases require the tenant to insure the building; others require the landlord to insure but recover the cost through the service charge.
Costs
Commercial property insurance premiums depend on:
| Factor | Impact |
|---|---|
| Building construction | Standard brick/concrete is cheaper than timber or non-standard materials |
| Location | Flood zones, high-crime areas, and subsidence-prone regions cost more |
| Use of premises | Offices are cheaper than manufacturing or warehouse use |
| Fire protection | Sprinklers, alarms, and fire doors reduce premiums |
| Security | Intruder alarms, CCTV, and secure locks reduce premiums |
| Claims history | Previous claims increase premiums |
| Sum insured | Higher sums insured cost more |
Typical Premium Ranges
| Property type | Typical annual premium |
|---|---|
| Office (standard construction) | £300 - £1,500 |
| Retail unit (high street) | £500 - £3,000 |
| Warehouse / industrial | £1,000 - £5,000+ |
| Restaurant / pub | £1,500 - £5,000+ |
These are indicative only — premiums vary widely based on the factors above.
Making a Claim
Steps to Follow
- Secure the premises to prevent further damage (this is a policy condition)
- Notify your insurer or broker as soon as possible
- Do not dispose of damaged items until the insurer or loss adjuster has inspected them
- Document the damage — photographs, videos, and a list of damaged or lost items
- Obtain repair estimates from contractors
- The insurer may appoint a loss adjuster to investigate and value the claim
- Agree the settlement — the insurer pays the repair or replacement cost, minus the excess
Claim Settlement Basis
| Basis | Description |
|---|---|
| Reinstatement | Cost of repair or replacement to the same specification (most common) |
| Indemnity | Cost of repair or replacement minus depreciation (less generous) |
| Agreed value | A pre-agreed amount for specified items (e.g. heritage buildings) |
Accounting Treatment
Commercial property insurance premiums are a business expense deductible for Corporation Tax or income tax:
Debit: Insurance expense (P&L)
Credit: Bank / Creditor
If the policy covers a period straddling two financial years, the premium should be prepaid — the portion relating to the next financial year is carried forward as a prepayment on the balance sheet.
Claim receipts are recorded as income, offsetting the cost of repairs or replacement:
Debit: Bank
Credit: Insurance claim receivable / Repair cost recovery
Common Mistakes
- Underinsurance — The most common and most costly mistake; always insure at full rebuilding cost
- Not updating sums insured — Construction costs rise annually; a figure set five years ago may be 20-30% below current rebuilding cost
- Ignoring lease obligations — Tenants may be liable for building insurance under the lease terms
- Not notifying unoccupancy — Most policies restrict or void cover if premises are unoccupied beyond the stated period
- Poor security — Failing to maintain the security measures specified in the policy can invalidate a claim
- Not separating stock from contents — Stock values fluctuate and should be insured at peak levels, not average levels