Collins Mark Plumbing, C-36 Plumbing Contractor in Pittsburg, CA
Collins Mark Plumbing operating as a sole owner holds an active California contractor license (CSLB #887634), valid through Nov 30, 2026. First issued in 2006, the license has been on the CSLB roster for 20 years. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Western Surety Company and an exempt workers' compensation status (no employees on payroll). The business is based in Pittsburg, in Contra Costa County, California.
- License Number
- 887634
- Issued
- Nov 27, 2006
- Status
- CLEAR
- Expires
- Nov 30, 2026
- Entity
- Sole Owner
- Surety
- Western Surety Company
- Bond Number
- 66879956
- Effective
- Jan 27, 2024
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 1, 2025
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Collins Mark Plumbing licensed in California?
Yes. Collins Mark Plumbing holds California Contractors State License Board license number 887634, which is active and in good standing. The license was first issued on November 27, 2006. It is valid through November 30, 2026.
What does Collins Mark Plumbing specialize in?
Collins Mark Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Collins Mark Plumbing headquartered?
Collins Mark Plumbing is headquartered at 3395 Crectview Dr, Pittsburg, CA 94565, in Contra Costa County, California.
Does Collins Mark Plumbing have an active surety bond on file with CSLB?
Yes. Collins Mark Plumbing has an active California contractor surety bond filed with Western Surety Company.
Does Collins Mark Plumbing carry workers' compensation coverage?
Collins Mark Plumbing reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Collins Mark Plumbing's contractor license?
You can verify Collins Mark Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=887634.
- License issuedNov 27, 2006
- Bond activeJan 27, 2024
- WC coverage startsFeb 1, 2025
- License expiresNov 30, 2026
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