Cosentino Plumbing & Backflow Services
Cosentino Plumbing & Backflow Services operating as a sole owner is licensed in California under CSLB number 291550. The license was first issued in 1974, putting the business at 52 years on the active CSLB roster. It carries 2 CSLB classifications: B General Building Contractor and C-36 Plumbing Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and an exempt workers' compensation status (no employees on payroll). The business is based in San Bruno, in San Mateo County, California.
- License Number
- 291550
- Issued
- Feb 20, 1974
- Status
- CLEAR
- Expires
- Feb 29, 2028
- Entity
- Sole Owner
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101777302
- Effective
- Feb 12, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Feb 17, 2026
- 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 Cosentino Plumbing & Backflow Services licensed in California?
Yes. Cosentino Plumbing & Backflow Services holds California Contractors State License Board license number 291550. The license was first issued on February 20, 1974. It is valid through February 29, 2028.
What does Cosentino Plumbing & Backflow Services specialize in?
Cosentino Plumbing & Backflow Services is licensed for 2 CSLB classifications: B General Building Contractor and C-36 Plumbing Contractor.
Where is Cosentino Plumbing & Backflow Services headquartered?
Cosentino Plumbing & Backflow Services is headquartered at 456 Beech Ave, San Bruno, CA 94066, in San Mateo County, California.
Does Cosentino Plumbing & Backflow Services have an active surety bond on file with CSLB?
Yes. Cosentino Plumbing & Backflow Services has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does Cosentino Plumbing & Backflow Services carry workers' compensation coverage?
Cosentino Plumbing & Backflow Services reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Cosentino Plumbing & Backflow Services's contractor license?
You can verify Cosentino Plumbing & Backflow Services's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=291550.
- License issuedFeb 20, 1974
- Bond activeFeb 12, 2026
- WC coverage startsFeb 17, 2026
- License expiresFeb 29, 2028
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