Legal Information — Not Legal Advice: This page provides general information about the CSLB complaint process.

What the CSLB Can Do for You

The CSLB can investigate the contractor, suspend or revoke their license, require mandatory arbitration, facilitate settlement, and refer serious cases for criminal prosecution. For disputes involving licensed contractors where the claim is $50,000 or less, CSLB arbitration is free, binding, and enforceable as a court judgment.

Step 1 — Verify the Contractor's License Status

Go to cslb.ca.gov and look up the contractor. Confirm the license was active during the period your work was performed and the classification covers the type of work done. Note the bonding company name and policy number for your simultaneous bond claim.

Step 2 — Gather Your Documentation

Assemble your contract and change orders, all invoices and proof of payment, photographs of defective work organized chronologically, all written communications with the contractor, a written timeline of events, and any independent inspection reports.

Step 3 — File Online at cslb.ca.gov

The CSLB accepts online complaints. You will need the contractor's license number, contact information, a description of the work and problem, the contract amount and amount paid, and supporting documentation. Be specific and factual.

Step 4 — Work With the Assigned Investigator

After filing, the CSLB assigns an investigator who contacts both you and the contractor. Respond promptly to all investigator requests. The investigator's report forms the basis of any disciplinary action or referral to arbitration.

Step 5 — Request CSLB Arbitration

For disputes with a licensed contractor where your claim is $50,000 or less, request binding arbitration through the CSLB's Arbitration Program. This is free, binding, and enforceable as a court judgment. Request arbitration explicitly in your complaint.

Talk to a Construction Attorney — Free Consultation

Bay Legal PC handles construction disputes throughout California. Tell us about your situation and we'll be in touch promptly.

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How to File a CSLB Complaint Against a Contractor