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Construction & Trades
Insurance for taking buildings down without taking the neighbours with them.
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A demolition contractor in Canada needs commercial general liability written for demolition, without a storey, structural or explosives exclusion that removes the real work, plus contractors' pollution liability for asbestos, lead, dust and debris. Add a contractors' equipment floater, commercial auto for trucks and bins, umbrella limits for contract requirements and workers' compensation. In Ontario, construction businesses must have WSIB coverage.
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Demolition is a high-hazard class. Collapse onto adjacent property, vibration damage, falling debris, live services and asbestos or lead released into occupied spaces all produce claims. Many contractor general liability policies exclude structural demolition or cap it by storeys, which catches renovators and excavators who take on a teardown. We place demolition with insurers that rate it properly and pair it with contractors' pollution liability.
We also cover the machines, with a contractors' equipment floater for shears, breakers and loaders, plus trucks, umbrella limits and certificates that say demolition. In Ontario, we work from the owner's designated substance list and asbestos report so your scope and your insurance match. See the wider construction and contractors guide for the sector view.
Demolition is construction in reverse, and the risks run the other way too. You are taking apart a structure whose condition no one fully knows, often next to buildings, sidewalks and services that stay in use. Walls fall the wrong way. Vibration cracks a neighbour's plaster. Dust carries asbestos or lead into the next unit. A buried service that was supposed to be disconnected is still live.
Insurers price that hazard separately. Many contractor liability policies exclude structural demolition outright, or limit it by height or storeys, and that catches renovators and excavators who add a teardown to a job. If demolition is part of your work, it must be declared and rated. Demolition sits inside the wider construction and contractors sector, and this page covers what is specific to tearing down, stripping out and clearing structures.
A demolition program usually has six parts. The liability and pollution policies carry most of the risk.
| Coverage | What it answers | Points to check |
|---|---|---|
| Commercial general liability (CGL) written for demolition | Collapse onto adjacent property, vibration damage, falling debris injuring the public, damage to services | Demolition declared, no storey, structural, explosives or subsidence exclusion that removes your work |
| Contractors' pollution liability | Asbestos, lead, silica and mould released into neighbouring spaces, fuel spills, contaminated debris | Asbestos and lead not excluded, transport and disposal sites included, sudden and gradual events |
| Contractors' equipment floater | Excavators with shears and breakers, skid steers, loaders and attachments | Owned, leased and rented machines, overturn and collapse; see tools and equipment |
| Commercial auto | Roll-off trucks, dump trucks and float trailers | Haul radius, loads and drivers; see commercial auto |
| Umbrella or excess liability | Contract limits and severe collapse or third-party injury claims | Follows form over CGL, auto and employer's liability |
| Workers' compensation and employer's liability | Struck-by, fall and crush injuries to your crew | Mandatory provincial coverage first, employer's liability for gaps |
Ontario regulates hazardous materials on construction projects through designated substances. O. Reg. 490/09 lists eleven, including asbestos, lead, mercury, silica, arsenic, benzene and vinyl chloride. The duties that matter most to a demolition contractor's insurance are set out below.
| Rule | What the law says | Why it matters for you |
|---|---|---|
| Owner's list | Before a project begins, the owner must determine whether designated substances are present and prepare a list of them. Tender documents must include it, and every prospective constructor, contractor and subcontractor must receive it before signing (OHSA, s. 30) | Ask for the list and the asbestos report before you price the job |
| Owner liability | An owner who fails to comply is liable to the constructor, contractors and subcontractors for losses from later discovery of a substance it ought reasonably to have known about (OHSA, s. 30(5)) | A surprise find is a cost you may be able to recover, which is why the paper trail matters |
| Asbestos survey before tender | Before requesting tenders for demolition, alteration or repair, the owner must have an examination done and a report prepared showing asbestos-containing material, its condition and its location (O. Reg. 278/05, s. 10) | The report defines the scope you price and insure |
| Unexpected material | If suspected asbestos not in the report is discovered, the constructor or employer must immediately notify a Ministry of Labour inspector, the owner and the contractor, and stop work that would disturb it until it is identified (s. 10(7) to (10)) | Stop-work delays are a contract issue, not usually an insured loss |
| Type 3 operations | Removing or disturbing more than one square metre of friable asbestos during demolition is a Type 3 operation, which requires advance notice to an inspector and workers and supervisors trained under approved programs (ss. 11, 12, 20) | Insurers ask whether you self-perform abatement or subcontract it |
Many CGL policies exclude asbestos entirely, and many pollution policies exclude or sublimit it unless you buy it back. If your crew removes asbestos, the policy must say so. If you subcontract abatement, collect the abatement firm's certificate showing pollution coverage that includes asbestos, and name your company as an additional insured. Other provinces regulate asbestos under their own occupational health and safety rules, so check with your provincial regulator.
The scenarios below are hypothetical, but they reflect the losses underwriters ask about on every demolition application.
| Hypothetical scenario | Allegation | Policy that responds |
|---|---|---|
| A party wall shared with a row house partly collapses during removal of the adjoining unit | Structural damage and loss of use next door | CGL written for demolition; a subsidence or collapse exclusion would be fatal to the claim |
| Breaker vibration cracks a neighbouring basement wall and plaster | Property damage from vibration | CGL, unless vibration damage is excluded; ask before you sign |
| Interior strip-out disturbs pipe insulation that was not in the asbestos report | Occupants next door claim exposure and clean-up costs | Contractors' pollution with asbestos cover; CGL usually excludes it |
| Debris falls from an upper floor onto a parked car on the street | Third-party property damage | CGL |
| Gas service assumed disconnected is struck during removal of a foundation | Fire and utility repair costs | CGL, with the defence built on disconnection records |
| Excavator with a shear attachment overturns on uneven rubble | Machine and attachment damaged | Contractors' equipment floater |
Ontario's Construction Projects regulation sets out how demolition must proceed. No building may be demolished until precautions are taken to prevent injury to people on or near the project or the adjoining property, gas, electrical and other services are shut off and disconnected, and toxic, flammable or explosive substances are removed (O. Reg. 213/91, s. 214). Manual demolition proceeds systematically from the highest to the lowest point (s. 216). Mechanical demolition controls must be operated from as remote a location as practicable, and a swinging weight must not swing against another building (s. 215).
Demolition of a building at least four metres high with a floor area of at least 30 square metres requires a notice of project before work begins (s. 6). Where excavation during removal of foundations may affect an adjacent building, the constructor must take precautions specified in writing by an engineer (s. 229). Separately, Ontario's Building Code Act, 1992 says no one may demolish a building without a permit from the chief building official (s. 8).
These records are your defence. Pre-demolition condition surveys of neighbouring buildings, with dated photos, separate old cracks from new ones. Vibration monitoring on sensitive sites shows what actually reached the neighbour. Disconnection letters from utilities prove services were dealt with. Insurers ask whether you use them, and a claim without them is harder to defend.
Pollution is the coverage demolition contractors most often lack. Standard CGL forms largely exclude it, so dust carrying lead or silica into an occupied unit, a fuel spill from equipment or contaminated debris taken to the wrong site may not be covered. CCDC 41 asks for $5,000,000 per occurrence of contractors' pollution liability on contracts that use it.
Junk hauling without structural work is a different class; see junk removal insurance. Post-fire or flood strip-outs overlap with restoration and remediation.
Owners and GCs hand demolition the highest-hazard part of the job, so they read your certificate closely. Many use CCDC contracts, whose insurance schedule, CCDC 41 (2020), sets general liability at $10,000,000 per occurrence for the contractor and asks for all-risks contractors' equipment coverage with no subrogation against the owner.
Larger and public jobs often need bonding; see contract surety. Our post on why every contract asks for a certificate covers additional insured and notice wording.
In Ontario, the WSIB says people who own or run a construction business must have coverage, with or without employees, including independent operators and sole proprietors. A principal that hires a contractor for construction work must obtain a clearance certificate before work begins, and can be held liable for the contractor's unpaid premiums, up to the labour value of the contract, if it doesn't. A clearance is valid for up to 90 days. Outside Ontario, check with your provincial workers' compensation board.
Asbestos work in Type 3 operations requires approved abatement worker and supervisor training (O. Reg. 278/05, s. 20). Our post WSIB is not enough explains why employer's liability still matters.
Demolition CGL is rated in one of the heavier construction classes, usually on payroll or revenue, with subcontracted work rated separately. Underwriters then adjust for:
Renovators who self-perform a little demolition often pay less by declaring it accurately than by having a claim denied. Start a quote with your revenue split by type of work.
Related trades: see excavation and renovation insurance.
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This page is general information, not insurance or legal advice. Coverage depends on your policy wording and the insurer. Speak with a licensed broker about your situation.
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