Best Licensed Plumbers in Clayton, CA
6 plumbing companies registered in Clayton hold current CSLB licenses, verified against official records as of August 17, 2026. All 6 are listed below, ordered by workers' compensation cover and years licensed.
- 484 active C-36 plumbing licenses in Contra Costa County; 6 registered in Clayton
- 0 of Clayton's 6 licenses (0.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Clayton: 21 years
- Longest Clayton licensure: since 1975
- 37 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1975
- Phone
- (925) 672-6533
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (925) 798-1815
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (925) 297-8808
- Verified
- August 17, 2026
- Licensed since
- 2005
- Phone
- (925) 216-8290
- Verified
- August 17, 2026
- Licensed since
- 2012
- Phone
- (925) 381-9435
- Verified
- August 17, 2026
- Licensed since
- 2024
- Phone
- (925) 510-1225
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Contra Costa Plumbing | #303993 | Exempt or none on file | 1975 |
| Rich Mc Carthy Plumbing | #566929 | Exempt or none on file | 1989 |
| Volga Plumbing | #639239 | Exempt or none on file | 1992 |
| Albright Plumbing | #858118 | Exempt or none on file | 2005 |
| M P Plumbing | #979512 | Exempt or none on file | 2012 |
| Dg Plumbing | #1120226 | Exempt or none on file | 2024 |
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, 6 of them registered in Clayton. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Clayton license has been held 21 years, and the longest-standing one dates to 1975. 0 of Clayton's 6 licenses (0.0%) 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 Clayton: common questions
How many licensed plumbers are there in Clayton?
6 active C-36 plumbing licenses are registered in Clayton, out of 484 across Contra Costa County. 6 Clayton-registered companies passed our license verification, and all 6 are listed on this page. 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. 6 active C-36 plumbing licenses are registered in Clayton and 484 across Contra Costa County, the longest-standing issued in 1975. 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 0 of Clayton's 6 currently carry. 37 Contra Costa County licenses expire within 90 days.