Cosentino Plumbing & Backflow Services, B General Building Contractor in San Bruno, CA
Cosentino Plumbing & Backflow Services operating as a sole owner holds an active California contractor license (CSLB #291550), valid through Feb 29, 2028. First issued in 1974, the license has been on the CSLB roster for 52 years. 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, which is active and in good standing. 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
- Cesare J D Construction INC#321720Burlingame·A General Engineering Contractor
- Spano Robert P#318162Burlingame·B General Building Contractor
- Imbelloni Construction CO INC#304975San Mateo·B General Building Contractor
- Polizzi Christopher Alan#295593Burlingame·B General Building Contractor
- O'keeffe's INC#101981Brisbane·B General Building Contractor
- Pribuss Engineering INC#251241So San Francisco·B General Building Contractor
- R F Johnson Construction#252469Millbrae·B General Building Contractor
- Lindstrom CO#244500San Mateo·B General Building Contractor
Working a California job with Cosentino Plumbing & Backflow Services, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Cosentino Plumbing & Backflow Services? Claim or correct this profile