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Concrete contractor insurance in Washington

For concrete contractors in Washington: flatwork, foundations, slabs, driveways, sawing and cutting. The insurance questions follow the work: what a general contractor's contract asks for, what happens after the pour cures, and how L&I treats your payroll. Below are the areas to examine with an insurance reviewer. One policy does not cover all of them.

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Who this page is for

  • Flatwork and foundation contractors working as subcontractors to builders
  • Owner-operators pouring driveways, patios and slabs for homeowners
  • Crews that saw, core-drill and cut existing concrete

What to review

The questions that matter

General liability and what a GC asks for

Most concrete work is done under someone else's contract, and that contract usually sets the insurance terms: general liability at stated limits, the general contractor and owner as additional insureds, a waiver of subrogation and a certificate before you mobilize. Additional insured status needs an endorsement on your policy; a certificate by itself cannot add it. Ask whether your policy's wording matches the contract and whether any exclusion applies to the structure you are working on.

Completed operations: after the pour cures

Concrete problems tend to show up later. A slab cracks, a foundation settles, a floor is out of level and the flooring on top of it fails. Completed operations coverage is the part of general liability that responds to injury or damage from work you have finished. Ask how long after completion it applies, whether the policy excludes your own work (many do) and what counts as resulting damage to other property.

Damage to adjacent property

Pours, pumping and demolition happen next to things you do not own: a neighbor's fence, a client's landscaping, an underground utility, the GC's finished framing. Damage to property in your care, custody or control is commonly excluded or limited under general liability, and where your care ends is not obvious on every job. Ask how the policy treats the part of the structure you are working on versus the rest of it, and whether utility strikes are covered.

Trucks, trailers and heavy equipment

Mixer trucks, dump trucks, pump trucks and the pickups that haul crews need commercial auto, and vehicles in employees' names raise hired and non-owned auto questions. Equipment that moves from site to site, such as power trowels, screeds, saws, forms, pumps and skid steers, is usually a contractor's equipment (inland marine) question rather than a property question, because property coverage is tied to a location. Rented and borrowed equipment can need its own treatment.

What Washington asks of concrete contractors

Washington requires construction contractors to register with L&I. General contractors post a $30,000 bond and specialty contractors a $15,000 bond (the amounts in effect since July 1, 2024), and registration requires proof of general liability insurance. L&I's classification plan places concrete flatwork in classification 0217-00, concrete foundations and flatwork for wood-frame buildings in 0217-01 and concrete sawing, drilling and cutting in 0217-02; confirm your own assignment with L&I, because the assignment follows the work performed, not the business name. Roadway paving falls under 0214, and landscape curbing done as part of a landscape project under 0301.

Workers' compensation through L&I

Washington is a state-fund state: most employers insure workers' compensation through L&I rather than a private carrier. L&I assigns each employer one or more risk classifications by the nature of the work, each with its own base rate, and adjusts an employer's rate by its experience factor. Employer's liability, sometimes called stop-gap, is not part of the state fund and is bought separately. If you use subcontractors or labor crews, ask who is responsible for their coverage.

Umbrella and higher limits

Larger general contractors and public owners often ask for liability limits above what a standard general liability or auto policy carries. A commercial umbrella sits over general liability, commercial auto and employer's liability and adds limits. Ask which underlying policies the umbrella follows, whether it follows form on completed operations and additional insured terms, and whether the limits in your usual contracts fit what you carry.

Illustrative example

a slab that cracks a year later

A contractor pours a garage slab for a builder. A year after the house closes, the slab heaves and cracks, and the homeowner's new epoxy floor fails with it. Whether a policy responds depends on whether completed operations coverage was in force, whether the cracked slab is excluded as the contractor's own work, and whether the ruined floor counts as resulting damage. Each is a separate question to ask. A real claim depends on the facts and the policy.

What to prepare

  • A description of the work: flatwork, foundations, sawing and cutting, residential or commercial
  • Your L&I contractor registration, bond and current risk classifications
  • Typical insurance clauses from the general contractors you work for
  • Vehicles, trailers and major equipment, who drives and where equipment is stored
  • Number of employees and any subcontractors or labor crews
  • Current policies, certificates you have issued and any recent claims
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Questions people ask

Quick answers

  • Not necessarily. L&I registration requires proof of general liability insurance, but a contract may ask for higher limits, additional insured status or completed operations for a set period. Compare the two before signing.
  • Usually not. General liability policies commonly exclude damage to your own work; repairing a bad pour is a business cost. Damage your work causes to other property is a separate question that may be covered.
  • Vehicles the business owns need commercial auto. Employees driving their own trucks on business raise hired and non-owned auto questions, and their personal policies may limit business use.
  • No. Most Washington employers insure workers' compensation through L&I. A broker can help with employer's liability (stop-gap), which the state fund does not include.

Go deeper

Related coverage and guides

Sources

Next step

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A request starts a conversation and a quote; it doesn't bind or change any insurance. Policy terms, exclusions and limits control.

Request a concrete contractor insurance review