Licensed Plumbing Contractors in California
Every plumbing contractor license on file with the California Contractors State License Board, class C-36, licensed for plumbing and drainage work. Status recomputed daily. Last updated August 17, 2026.
1 of 18,172 plumbing contractors in California (0.0%) currently hold an expired license. That is not a rounding error, it is roughly one in 18172 of everyone in the trade. Licenses lapse quietly, and nothing stops an expired licensee from answering the phone and quoting your job.
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What a plumbing contractor license does and does not tell you
A current license means the CSLB has confirmed this person met the state's competency and examination requirements and has kept the registration paid up. It does not mean they carry liability insurance, that their work is warrantied, or that previous customers were happy. Verify the license here, then ask for a certificate of insurance and references separately.