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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File a Complaint

You can file complaints with the board either online or by mail.

Alert symbol ALERT: Before filing your complaint

Please review How the Complaint Process Works, as the process for licensed contractors is different than the process for unlicensed contractors.

You will need Acrobat Reader to download, print and/or save the Complaint Form.

File a Complaint Online

NOTE: Online complaints can be submitted anytime, except between Sunday at 7:30 p.m. and Monday 6 a.m.

This section provides an online form for submitting a temporary Construction Complaint and generates a .pdf of your filled out Construction Complaint form, as well as instructions for final submission and necessary support documentation.

IF YOU WERE ABLE TO COMPLETE THE FORM, BUT ARE NOT SURE IF YOUR ONLINE COMPLAINT WAS SUCCESSFULLY SUBMITTED, DO NOT COMPLETE AND SUBMIT ANOTHER ONLINE FORM, as you may create a duplicate complaint and delay the process. Instead, please call (800) 321-CSLB (2752) during normal business hours (Monday - Friday, 8 a.m. to 5 p.m.). When the automated operator answers press 324 on your keypad; this will direct you to a complaint handling agent to verify submission of your online complaint.

File a Complaint by Mail

This section includes the Construction Complaint form and instructions for filing a complaint by mail.


Filing a False Complaint

7011.8. (a) Any person who reports to, or causes a complaint to be filed with, the Contractors' State License Board that a person licensed by that entity has engaged in professional misconduct, knowing the report or complaint to be false, is guilty of an infraction punishable by a fine not to exceed one thousand dollars ($1,000).
(b)The board may notify the appropriate district attorney or city attorney that a person has made or filed what the entity believes to be a false report or complaint against a licensee.