Best Licensed Plumbers in Antioch, CA
54 plumbing companies registered in Antioch hold current CSLB licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
- 484 active C-36 plumbing licenses in Contra Costa County; 54 registered in Antioch
- 20 of Antioch's 54 licenses (37.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Antioch: 8 years
- Longest Antioch licensure: since 1982
- 37 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1982
- Phone
- (925) 754-4990
- Verified
- August 17, 2026
- Licensed since
- 1988
- Phone
- (925) 757-8791
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (925) 706-8694
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (925) 250-4637
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (925) 777-9519
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (925) 776-7642
- Verified
- August 17, 2026
- Licensed since
- 2007
- Phone
- (925) 584-1951
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (925) 778-5629
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Mark Petersen Corporation DBA American Plumbing | #418845 | On file | 1982 |
| Marine & Industrial Services Inc. | #534970 | On file | 1988 |
| Pro Plumbing Services | #729157 | On file | 1996 |
| H2o Plumbing By Eddie Giffin | #770148 | On file | 1999 |
| Coastal Bound Inc. DBA Cypress Plumbing | #803780 | On file | 2002 |
| Baja Plumbers | #808133 | On file | 2002 |
Contra Costa County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 484 active C-36 plumbing licenses in Contra Costa County, 54 of them registered in Antioch. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Antioch license has been held 8 years, and the longest-standing one dates to 1982. 20 of Antioch's 54 licenses (37.0%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 484 of the county's 484 licenses carry the same $25,000 bond California sets by statute. 37 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.
Plumbers in Antioch: common questions
How many licensed plumbers are there in Antioch?
54 active C-36 plumbing licenses are registered in Antioch, out of 484 across Contra Costa County. 54 Antioch-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license plumbers?
Yes. California licenses contractors by classification, and C-36 is the CSLB classification that authorises this work. 54 active C-36 plumbing licenses are registered in Antioch and 484 across Contra Costa County, the longest-standing issued in 1982. Only CLEAR, unexpired licenses appear here.
How do I check a plumber's license in California?
Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which 20 of Antioch's 54 currently carry. 37 Contra Costa County licenses expire within 90 days.