Contractor License Proof

Collins Mark Plumbing

Licensed

Verified against CSLB on · View on CSLB

License details

License number
887634
Status
Active
Classifications
C-36 · Plumbing
Contractor bond
$25,000
Workers' comp
Exempt
License term on file
November 27, 2006 – November 30, 2026

Business

  • (510) 508 8814 (CSLB public record)
  • 3395 CRECTVIEW DR, Pittsburg, CA 94565Contra Costa County

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Frequently asked questions

Is Collins Mark Plumbing licensed in California?

Yes. Collins Mark Plumbing holds an active California state contractor license (CSLB #887634), verified against the CSLB public record on June 17, 2026.

What is Collins Mark Plumbing's CSLB license number?

Collins Mark Plumbing's California contractor license number is 887634. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=887634

What kind of work is Collins Mark Plumbing licensed for?

Collins Mark Plumbing is classified under Plumbing (C-36) by the CSLB.

How do I verify Collins Mark Plumbing's license myself?

Look up license #887634 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=887634. This page reflects the CSLB public record as of June 17, 2026.

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