Contra Costa Plumbing, C-10 Electrical Contractor in Clayton, CA
Contra Costa Plumbing operating as a sole owner holds an active California contractor license (CSLB #303993), valid through Sep 30, 2026. First issued in 1975, the license has been on the CSLB roster for 51 years. It carries 2 CSLB classifications: C-10 Electrical Contractor and C-36 Plumbing Contractor. Records show an active surety bond on file with Business Alliance Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in Clayton, in Contra Costa County, California.
- License Number
- 303993
- Issued
- Mar 27, 1975
- Status
- CLEAR
- Expires
- Sep 30, 2026
- Entity
- Sole Owner
- Surety
- Business Alliance Insurance Company
- Bond Number
- G101103999710
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Aug 26, 2024
- 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 Contra Costa Plumbing licensed in California?
Yes. Contra Costa Plumbing holds California Contractors State License Board license number 303993, which is active and in good standing. The license was first issued on March 27, 1975. It is valid through September 30, 2026.
What does Contra Costa Plumbing specialize in?
Contra Costa Plumbing is licensed for 2 CSLB classifications: C-10 Electrical Contractor and C-36 Plumbing Contractor.
Where is Contra Costa Plumbing headquartered?
Contra Costa Plumbing is headquartered at P O Box 515, Clayton, CA 94517, in Contra Costa County, California.
Does Contra Costa Plumbing have an active surety bond on file with CSLB?
Yes. Contra Costa Plumbing has an active California contractor surety bond filed with Business Alliance Insurance Company.
Does Contra Costa Plumbing carry workers' compensation coverage?
Contra Costa Plumbing reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Contra Costa Plumbing's contractor license?
You can verify Contra Costa Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=303993.
- License issuedMar 27, 1975
- Bond activeJan 1, 2023
- WC coverage startsAug 26, 2024
- License expiresSep 30, 2026
- Hearthstone Building & Restoration#319036Walnut Creek·B General Building Contractor
- White L H General Building Contractor#275246Lafayette·B General Building Contractor
- R F Clark of San Francisco#354264Lafayette·B General Building Contractor
- Bay Air Systems INC#450929Concord·C-4 Boiler, Hot Water Heating and Steam Fitting Contractor
- Rivers Plumbing Heating and Air#406446Walnut Creek·B General Building Contractor
- Kel-Aire#303947Rodeo·C-10 Electrical Contractor
- Carter's Electric#319759Pinole·C-10 Electrical Contractor
- Beaver's Construction Company#327474Brentwood·B General Building Contractor
Working a California job with Contra Costa Plumbing, 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 Contra Costa Plumbing? Claim or correct this profile