Contractor Licensing in California
In California, contractors performing work valued above $500 in labor and materials must hold a valid license from the Contractors State License Board (CSLB). You can verify any contractor's license number, status and classifications at cslb.ca.gov at no cost.
For bathroom remodeling, the relevant license classifications include Class B (General Building Contractor) and Class C specialty classifications including C-36 (Plumbing) for projects involving plumbing scope. The combination of classifications required depends on the specific scope of the project.
We strongly recommend that any homeowner considering a remodeling contractor verify the license number independently through the CSLB website, confirm the classifications match the scope of the work and confirm that any required trade contractors such as plumbers or electricians hold their own appropriate licenses.