Guides
Commercial property insurance: what it covers and what it doesn't
How the standard ISO commercial property policy works: covered property, causes of loss, built-in extensions and limits, valuation, and the gaps to close.
Commercial property insurance pays for direct physical loss of or damage to the buildings, equipment, inventory and other property your business owns or must insure, when a cause of loss named in the policy does the damage. Under the standard ISO form (CP 00 10, Building and Personal Property Coverage Form), what you actually collect depends on three things the declarations page fixes: which causes of loss are covered, how the loss is valued, and what limit you bought. Manuscript and carrier-specific forms differ, so read your own policy against what follows.
How the policy is assembled
A commercial property policy is a coverage part built from pieces. The declarations page lists locations, limits, deductibles, the valuation basis and the coinsurance percentage. Common policy conditions (cancellation, changes) and the Commercial Property Conditions (CP 00 90) apply to everything. Then come one or more coverage forms, a causes of loss form, and endorsements. If you want to see how the pieces stack, how to read a commercial policy: declarations, forms and endorsements walks through it, and the ISO forms behind most carriers' wording are the reason policies from different insurers read alike.
The ISO coverage forms you will meet most often:
| Form | What it does |
|---|---|
| CP 00 10 | Building and Personal Property: the core form for buildings and contents |
| CP 00 20 | Builders Risk: buildings under construction or renovation |
| CP 00 30 | Business Income (and Extra Expense): lost earnings and added costs after a covered loss |
| CP 00 32 / CP 00 50 | Business Income without Extra Expense / Extra Expense alone |
| CP 10 10, 10 20, 10 30 | Causes of Loss: Basic, Broad and Special |
Small businesses often get property cover inside a package instead; the What is a business owner's policy (BOP)? guide explains how a BOP bundles it.
What counts as covered property
Under CP 00 10 the policy only covers a type of property if a limit is shown for it. There are three buckets.
- Building. The structure described in the declarations, including completed additions, fixtures, permanently installed machinery and equipment, outdoor fixtures, and your own property used to maintain the building (fire extinguishers, floor coverings, appliances for cooking, dishwashing, laundering and refrigerating).
- Your Business Personal Property. Furniture and fixtures, machinery and equipment, "stock" (merchandise, raw materials, goods in process, packing supplies), other personal property you own and use in the business, and your use interest in tenant improvements and betterments. Leased equipment you have a contract duty to insure is in here too.
- Personal Property of Others. Customers' or clients' property in your care, custody or control, paid for the account of the owner.
All of it must be in or on the building, or in the open or in a vehicle within 100 feet of the building or the described premises. A tenant usually buys the second and third buckets but not the first; insurance requirements in commercial leases covers who insures what under a lease.
What the form leaves out
The form's Property Not Covered list is longer than owners expect. It includes money and securities, land, growing crops and lawns, the cost of excavations, grading and backfilling, foundations below the lowest basement floor (or below ground level if there is no basement), underground pipes, flues and drains, bridges, roadways, walks and patios, vehicles licensed for road use, automobiles held for sale, and electronic data and valuable papers except to the limited extent the extensions allow. Those exclusions matter for insurance to value: setting the right building limit: a building limit should not include the below-grade foundation, but it should still reflect everything else it costs to rebuild.
Causes of loss: the second half of the policy
CP 00 10 does not say what perils it covers. The attached causes of loss form does. The Basic form (CP 10 10) and Broad form (CP 10 20) name the covered perils; the Special form (CP 10 30) covers direct physical loss unless the loss is excluded or limited. Most owners buy Special. The differences are laid out in basic, broad and special causes of loss forms: what each covers.
"Special" does not mean "everything." In the CP 10 30 10 12 edition the exclusions include ordinance or law, earth movement, governmental action, nuclear hazard, failure of off-premises utility service, war, and water: flood, surface water, mudslide, sewer and drain backup, and groundwater seepage. Fungus, wet and dry rot and bacteria are excluded except for a limited additional coverage capped at $15,000 for the policy year. A second group of exclusions carves out wear and tear, rust, latent defect, settling and cracking, mechanical breakdown, dishonest acts by your own people, and continuous seepage or leakage over 14 days or more. commercial property exclusions: what the standard policy won't pay goes through them one by one.
A few scenarios show where the Special form responds and where you need something else. All are hypothetical, and the answers assume the standard ISO wording.
| Loss | Standard Special form response | Gap to close |
|---|---|---|
| Kitchen fire damages the building and contents | Covered; fire is not excluded | None |
| Hail damages the roof | Generally covered as windstorm or hail | Check for a roof surfacing endorsement and any wind/hail deductible |
| A supply pipe cracks and floods the stockroom | Water damage resulting from the break is covered; the cost to repair the pipe itself is not, though tear-out to reach it is | None, usually |
| River overflows into the first floor | Excluded (flood) | Commercial flood insurance: NFIP limits and private options |
| Floor drain backs up | Excluded (sewer and drain backup) | Water backup endorsement |
| Compressor burns out and the walk-in cooler warms | Mechanical breakdown excluded | equipment breakdown insurance: what it covers that property insurance does not and spoilage coverage |
| Bookkeeper steals inventory | Dishonest acts excluded | Crime coverage |
| Earthquake cracks the slab | Excluded (earth movement) | earthquake insurance for businesses: coverage, deductibles, limits |
Built-in coverages and extensions, with their limits
The form adds several coverages automatically. The dollar figures below are the standard ISO 10 12 edition amounts, and the declarations can raise them ("unless a higher limit is shown"); carrier forms sometimes set different numbers.
| Provision | Standard limit or rule |
|---|---|
| Debris removal | Up to 25% of the loss paid plus the deductible, with an extra $25,000 per location if that is exhausted; expense must be reported in writing within 180 days |
| Preservation of property | Property moved to protect it from a covered loss is covered for 30 days |
| Fire department service charge | $1,000 per premises, no deductible |
| Pollutant clean-up and removal | $10,000 per premises per 12-month policy period |
| Increased cost of construction | The lesser of $10,000 or 5% of the building limit; applies only where replacement cost applies |
| Electronic data | $2,500 per policy year |
| Newly acquired or constructed property | $250,000 per building and $100,000 of business personal property per building, for up to 30 days or until you report values |
| Personal effects and property of others | $2,500 per premises |
| Valuable papers and records | $2,500 per premises to recreate lost information |
| Property off premises | $10,000 |
| Outdoor property (fences, antennas, trees, shrubs, plants) | $1,000 per occurrence, $250 per tree, shrub or plant, for named causes only |
| Non-owned detached trailers | $5,000 |
| Business personal property in portable storage units | $10,000, for up to 90 days |
| Outdoor signs | $2,500 per sign |
Two points trip owners up. The coverage extensions (newly acquired property, off-premises property, outdoor property and the rest) apply only if the declarations show a coinsurance percentage of 80% or more or a value reporting symbol, so they silently disappear on policies written at lower percentages. And the $10,000 or 5% increased cost of construction figure is tiny next to what a code upgrade costs on a damaged commercial building; the separate ordinance or law coverage: paying for code upgrades after a loss endorsement exists for that reason.
How a loss is valued and paid
The form values property at actual cash value (replacement cost less depreciation) unless replacement cost is chosen as an optional coverage. Replacement cost pays only once the work is actually done. replacement cost vs actual cash value for business property explains the difference and the 180-day window to claim the holdback.
If the policy carries a coinsurance percentage, the insurer compares your limit with the value at the time of loss and cuts the payment proportionally when you are short; see the coinsurance clause and how underinsurance is penalized. The deductible comes off after that adjustment. A mortgage lender named in the declarations is paid as its interest appears, and may be paid even when you are not.
The vacancy condition is worth knowing. A building vacant more than 60 consecutive days loses coverage for vandalism, sprinkler leakage (unless the system was protected against freezing), glass breakage, water damage, theft and attempted theft, and other covered losses are cut by 15%. For an owner, a building counts as vacant unless at least 31% of its square footage is leased and used, or used by you, for customary operations. See vacant building insurance and the vacancy clause.
What drives the price
Rating starts with the insured value and then adjusts for construction type, occupancy, protection class (fire department response and water supply), and exposures such as nearby buildings and local weather. Underwriters ask about roof age and type, updates to wiring, plumbing and heating, sprinklers and alarms, and what the business does inside the building, since a bakery and an office share a wall but not a fire profile. Catastrophe-prone locations often carry their own wind, hail or named storm deductibles, commonly set as a percentage of the insured value rather than a flat dollar amount. Higher deductibles and accurate values are the levers you control. Understating values lowers the premium and sets up a coinsurance penalty, which is the worst trade in the policy.
Checklist: what to confirm on your declarations page
- Each location, building and contents limit, and whether limits are scheduled or blanket.
- The causes of loss form: Basic, Broad or Special.
- The valuation basis: replacement cost or actual cash value, including for the roof.
- The coinsurance percentage, or whether agreed value is in force and until when.
- Every deductible: all-other-perils, wind/hail, named storm, and any water-damage deductible.
- Business income and extra expense limits, the waiting period and the period of indemnity.
- Endorsements for ordinance or law, equipment breakdown, spoilage, water backup, flood or earthquake if you need them.
- Mortgageholders and loss payees, and that their names are right.
The What business insurance do I need? tool helps you spot gaps across lines. A broker can run the same exercise against a statement of values.
Key takeaways
- Commercial property insurance covers direct physical loss to buildings and contents from covered causes; the causes of loss form, not the coverage form, decides which perils.
- The Special form is open-perils but excludes flood, earthquake, sewer backup, utility failure, mechanical breakdown, employee dishonesty and wear and tear, each of which needs its own coverage.
- Built-in extensions have small standard limits (for example $2,500 for valuable papers and $10,000 for pollutant clean-up), so check what your declarations raise.
- Valuation and coinsurance determine how much of a loss you collect; a low limit or an actual cash value roof can cost you more than the deductible.
- Lost income after a fire is not in the building and contents limits; it needs business interruption insurance: how business income coverage works.