Yes, more often than not. Your general liability policy excludes pollution claims, from your own crew's work and from your subs' work. Owners now write pollution coverage into ordinary building contracts, not just cleanup jobs. Who this is for: general contractors who assumed pollution insurance was for the excavator and the asbestos removal crew.
The short version
- When a sub releases fumes, dust, fuel, sewage, or mold, the owner sues you too. You hired the sub.
- Your general liability policy excludes pollution, including pollution from your subs' work.
- Most subs do not carry pollution coverage, so their certificate does not protect you.
- Contractors pollution liability usually covers your work and your subs' work in one policy. Ask to see that wording before you buy.
- Illustrative cost for a small general contractor is about $2,500 to $7,500 a year at a $1,000,000 limit.
Why would a general contractor face a pollution claim on an ordinary job?
Because every trade on your site can release something, and your name is on the prime contract. Their lawyer sues you first.
| Ordinary work by your sub | What gets released | Who gets sued |
|---|---|---|
| Interior demolition in a 1970s building | Dust, asbestos, lead paint | You and the sub |
| Excavation for footings | Fuel from a struck line, bad soil | You and the sub |
| Roofing and painting | Fumes into an occupied building | You and the sub |
| Plumbing | Sewage backup, then mold | You and the sub |
| Drywall and insulation | Mold behind new walls | You alone, because mold shows up after the subs are gone |
| Temporary heaters and generators | Carbon monoxide, fuel spills | You, it is your equipment |
Doesn't my subs' insurance cover their own spills?
Only if the sub bought pollution coverage, and most trades have not. Their general liability policy has the same exclusion yours does. Even when a sub carries it, the owner can still sue you, and your defense costs are yours. Require $1,000,000 of pollution coverage from your excavation, demolition, asbestos removal, mechanical, plumbing, roofing, and painting subs. Keep your own policy too. See collecting certificates from subcontractors.
Why doesn't my general liability policy cover it?
Nearly every general liability policy has a pollution exclusion. It removes injury, damage, and cleanup claims caused by a release at a site where you or your subs are working. The standard form gives back a few narrow things. One is fumes from materials brought inside a building for the work. Most contractor policies then add a total pollution exclusion, a separate page that removes even those.
| The page that decides it | What it means for a general contractor |
|---|---|
| Total pollution exclusion, on most contractor policies | Removes the narrow give-backs and keeps applying after your subs are gone. |
| Fungi or bacteria exclusion, a separate page | No payment for mold, the most common pollution claim on finished buildings. |
What does pollution insurance do for a general contractor?
Contractors pollution liability covers claims from your work and, on most forms, from work your subs do for you. Ask your broker to point to the words "performed by you or on your behalf" and to confirm there is no subcontractor exclusion. It usually pays for:
- Bodily injury to owners, tenants, neighbors, and other trades' workers.
- Property damage, including tear-out and rebuilding after mold or sewage.
- Cleanup costs a government agency orders.
- Legal defense, often the largest cost when several parties are sued. On most pollution policies defense comes out of the limit, not on top of it the way general liability defense does. Ask which way your quote is written.
The owner can also be added to the policy, so they can use it if they are sued because of the project. Buy it as an annual policy or as a project policy for one job.
Do owners actually require it from general contractors?
Yes, and more each year. Developers, hospitals, and school districts copy the requirement from big projects into ordinary ones. Typical wording asks for:
- $1,000,000 to $5,000,000 of contractors pollution liability.
- The owner, and sometimes the lender, named on your policy.
- Mold covered up to the full limit, or at least $250,000. (A cap lower than the main limit is called a sublimit.)
- Coverage that continues for years after the project is complete.
On large projects the owner may buy one program for everyone. Ask whether pollution is inside it.
What does pollution insurance cost for a general contractor?
These figures are illustrative. Revenue, how much you sub out, how much digging or demolition you do yourself, and your claims history set the price.
| General contractor | Illustrative annual cost, $1,000,000 limit |
|---|---|
| Residential remodeler, under $2,000,000 revenue | $2,500 to $4,500 |
| Commercial general contractor, $2,000,000 to $10,000,000 revenue | $4,000 to $7,500 |
| Same firm at a $5,000,000 limit | Roughly one and a half to two and a half times the $1,000,000 price, because each layer above the first costs less per dollar |
| Bundled with general liability | Often a few hundred dollars less than buying them apart |
See the general contractors insurance guide and cheaper pollution coverage.
What this looks like in real life
Illustrative example. It is typical of what we see and is not a promise of how any specific situation would be handled.
The setup: A general contractor in Massachusetts takes a $2,100,000 renovation of a 1960s office building. He carries general liability and a $2,000,000 umbrella, and no pollution coverage. His demolition sub carries general liability only.
What went wrong: The demolition crew grinds old floor tile mastic without testing it. It contains asbestos. Dust spreads through the air system into occupied floors. The owner shuts the building and two tenants sue.
What it cost: Cleanup and tenant relocation come to about $95,000, and defense and settlement add roughly $60,000. Both general liability insurers deny the claim, one under its asbestos exclusion and one under a total pollution exclusion, and the umbrella follows the general liability policy. The general contractor pays about $120,000. An annual pollution policy would have been an illustrative $6,500.
The fix: On any renovation of an older building, treat pollution coverage as part of the base program. Ask your broker whether your general liability carries an asbestos exclusion or a total pollution exclusion.
Frequently asked questions
Q: Do general contractors need pollution insurance for ordinary construction work?
Usually yes. Your general liability policy excludes pollution from your crew's work and your subs' work, and owners now require it on ordinary projects. Contractors pollution liability usually covers both in one policy.
Q: If my sub causes a spill, why is it my problem?
Because you hold the prime contract. The owner sues you first and sorts out the subs later. Your own defense costs fall outside your general liability policy.
Q: Does my umbrella policy cover pollution if my general liability does not?
Almost never. Umbrella policies follow the exclusions of the policies beneath them and usually add their own pollution exclusion. If a contract wants $5,000,000 of pollution coverage, the extra limit is bought as an excess layer over your pollution policy from the same specialty market.
Q: Is mold on a finished building a pollution claim?
Insurers treat it as one. Most contractor policies also carry a separate fungi and bacteria exclusion, and that is the page that decides a mold claim. Mold found months after completion is the most common pollution claim against general contractors.
Q: Should I make my subs carry pollution insurance?
Yes, for excavation, demolition, asbestos removal, mechanical, plumbing, roofing, and painting subs. Put a $1,000,000 requirement in the subcontract and ask to be named on their policy.
Q: Does it cover contamination that was in the building before we started?
Usually not. These policies pay for what the work releases. Something already there is normally left out, though a few policies can add limited coverage for it.
How Morrow helps
Morrow is a licensed independent commercial insurance brokerage that works with contractors and trades every day. Placing pollution coverage that covers a general contractor's own work and every sub's work, at the limit the owner's contract demands, is a routine placement for our general contractor clients.
- Free contract review. Send us the contract or bid documents and we mark up the insurance section in plain English, whether or not you buy anything from us.
- Free, instant certificates. Clients issue their own certificates of insurance online in about a minute, any hour, any day, at no charge.
- Markets you cannot reach online. One application, shopped across many insurance companies for general liability, workers comp, auto, umbrella, and pollution coverage.
One more thing. This article is general information and is not legal advice or a statement of coverage. Your contract and your policy wording control in every case. Requirements vary by customer, by state, and by insurance company, so have a licensed advisor review your own contract and your own policy before relying on any of it.
Last updated: Reviewed by the Morrow commercial lines team. Last updated September 2026.