Welcome to the State of California

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Complaints By Mail

This section informs you about how to file a complaint by mail and the necessary support documentation.

To file your complaint by mail, begin by downloading the Construction Complaint Form or call 1-800-321-CSLB (2752) to request that a complaint form be mailed to you.

  1. Gather all documentation that you have related to the construction project.
  2. Fill out and sign the form.
  3. Make copies of support documentation called out on the form. It is usually indicated with the word "(Provide copies.)", where it is applicable.

  4. Mail Complaint Form and copies (DO NOT SEND ORIGINALS) of Support Documentation to the appropriate address listed below, based on which county in California the construction project is located:

    • For work performed in Imperial, Los Angeles, Orange, Riverside, San Diego or Ventura counties, send complaint forms to:

      Norwalk Intake & Mediation Center
      12501 East Imperial Highway, Suite 620
      Norwalk, CA 90650

    • For work performed in any California county not mentioned above, send complaint forms to:

      Sacramento Intake & Mediation Center
      P.O. Box 269116
      Sacramento, CA 95826-9116