Welcome to the State of California

Contact Us

Contractors State License Board
9821 Business Park Drive
Sacramento, CA 95827
Phone (800) 321-CSLB (2752)

Other Office Locations


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Filing a Construction Complaint

CSLB's complaint process is designed to protect the public in matters pertaining to construction and to assist in the resolution of construction-related complaints. CSLB addresses violations of California Contractors License Law, whether the contractor is licensed or unlicensed, for up to four years from the date of the act.

How the Complaint Process Works

This section is an overview about how CSLB addresses complaints and the procedures that are followed.

  • Licensed and Unlicensed Project Complaints

    Use this form if you are a homeowner, other contractor, subcontractor, or employee who wants to file a complaint against a contractor. Public agencies also may file complaints using this form. Complaint form (PDF | ORDER | ONLINE)

  • Unlicensed and Licensed Contractor Projects - Active

    Use this form to file a complaint for ACTIVE projects being undertaken by both unlicensed and licensed contractors. Please submit this form only if you know the job site address. If you are party to a contract on an active project, please use the Complaint form above.

    Lead Referral form (PDF)

  • Advertising Complaints

    Use this form to report an unlicensed contractor who is advertising illegally.

    Advertising Complaint form (PDF)

  • Building Permit Complaints

    This form is to be used to report any contractor who fails to pull a project building permit for construction activity.

    Building Permit Violation Referral form (PDF)