B · Building & structure

Insurance Requirements for California General Building Contractors

General building contractors carry the broadest scope of work among California license classifications. A B license authorizes construction, remodeling, and repair of structures requiring at least two unrelated building trades. That scope creates a wide range of insurance exposures.

What the CSLB Requires

The Contractors State License Board mandates two financial protections for every active B-license holder:

Contractor license bond ($25,000). This surety bond must be filed with the CSLB and remain active for the duration of the license. It protects consumers against violations of the Contractors State License Law and resulting construction defects. It does not cover general property damage or personal injury.

Workers' compensation insurance. Required if the contractor has any employees. Sole proprietors with no employees may file an exemption. General building contractors frequently employ crews, so workers' comp is standard for most B-license holders.

What the CSLB Does Not Require

The CSLB does not require general liability insurance. This is the gap most homeowners and many new contractors do not realize exists. The license bond and workers' comp are mandatory. Liability insurance is voluntary.

For a general building contractor, this gap is significant. A framing error that damages an adjacent property, a subcontractor injury on a job without adequate coverage, or a water intrusion defect discovered years after completion are all scenarios that the license bond does not cover.

General Liability Insurance for B-License Contractors

Most general building contractors carry commercial general liability (CGL) policies because their clients require it. General contractors working on residential projects valued above $500,000 or any commercial project will almost always be asked for a Certificate of Insurance before a contract is signed.

Standard CGL minimums for general building contractors in California are $1 million per occurrence and $2 million aggregate. Larger commercial projects may require $5 million or more, often structured with an umbrella policy.

Premiums vary based on annual revenue, number of employees, claims history, and the types of projects performed. General building contractors typically pay more for liability coverage than single-trade specialty contractors because their scope of work is broader and the potential for subcontractor-related claims is higher.

Completed Operations Coverage

General building contractors should confirm that their CGL policy includes completed operations coverage. This covers claims arising from work that has already been finished and handed over to the owner. Construction defect claims in California can be filed years after project completion under the state's statute of repose (up to 10 years for latent defects).

Without completed operations coverage, a contractor who finishes a project and moves on has no protection against defect claims filed after the policy period ends.

Subcontractor Insurance Requirements

General building contractors manage subcontractors across multiple trades. Each subcontractor should carry their own general liability and workers' comp coverage. The general contractor is not automatically covered by a subcontractor's policy, and the subcontractor is not automatically covered by the general's policy.

Best practice is to require Certificates of Insurance from every subcontractor before they start work, and to verify that the general contractor is listed as an additional insured on each subcontractor's policy.

What Homeowners Should Verify

Before hiring a general building contractor, verify these items:

1. License bond: confirmed active on the contractor's CSLB record.
2. Workers' compensation: either active coverage or a valid exemption. If the contractor claims to be exempt, confirm they are a sole proprietor with no employees or helpers.
3. General liability insurance: request a Certificate of Insurance (COI) directly from the contractor. Verify the policy is current and check the per-occurrence and aggregate limits.
4. Subcontractor coverage: ask whether all subcontractors will carry their own insurance. A general contractor who manages uninsured subcontractors creates liability exposure for the homeowner.

Related Guides

• Contractor bond and insurance guide
• How to verify a contractor license
• California contractor license requirements

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