Contractor License Proof

Contra Costa Plumbing

Licensed

Verified against CSLB on · View on CSLB

License details

License number
303993
Status
Active
Classifications
C-10 · ElectricalC-36 · Plumbing
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
March 27, 1975 – September 30, 2026

Business

  • (925) 672 6533 (CSLB public record)
  • P O BOX 515, Clayton, CA 94517Contra Costa County

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Frequently asked questions

Is Contra Costa Plumbing licensed in California?

Yes. Contra Costa Plumbing holds an active California state contractor license (CSLB #303993), verified against the CSLB public record on June 17, 2026.

What is Contra Costa Plumbing's CSLB license number?

Contra Costa Plumbing's California contractor license number is 303993. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.

What kind of work is Contra Costa Plumbing licensed for?

Contra Costa Plumbing is classified under Electrical (C-10) and Plumbing (C-36) by the CSLB.

How do I verify Contra Costa Plumbing's license myself?

Look up license #303993 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of June 17, 2026.

Verify it yourself: How to verify a California contractor license · Look up #303993 on CSLB

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See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.