Plumber licenses in
California
California licenses plumbers statewide.
Official search run by Contractors State License Board (CSLB) at cslb.ca.gov.
What the license should say
In California you'll see one of these on a plumber's card, bid or truck:
- C-36 Plumbing Contractor
- Business or individual contractor; water supply, waste disposal, gas piping, water heaters and related plumbing in all structures.
Hiring a company, not a person?
A CSLB contractor license, typically the C-36 Plumbing classification, for any job of $1,000 or more in labor and materials or that needs a building permit. California licenses the contracting business through CSLB, not individual tradespeople, because employees who work for wages only are exempt from the contractor law (B&P 7053).
Doing it yourself
An owner who personally does the work on their own property, or uses employees paid only wages, is exempt from contractor licensing if the improvements are not for sale (B&P 7044(a)(1)), and no license is needed for a casual or minor job under $1,000 total that requires no building permit (B&P 7048).
Before you hire
- Contractor licensing in California (small-job limits, bonds, permits)
- How to check a license in California, step by step
- Before-you-hire checklist (one page, free PDF)
- File a complaint about a plumber (opens official site)
Keep this handy
We'll email you the one-page before-you-hire checklist, plus occasional tips on hiring safely.