Best Licensed Plumbers in San Ramon, CA
20 plumbing companies registered in San Ramon 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; 21 registered in San Ramon
- 8 of San Ramon's 21 licenses (38.1%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in San Ramon: 7 years
- Longest San Ramon licensure: since 1989
- 37 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (925) 383-6100
- Verified
- August 17, 2026
- Licensed since
- 2002
- Phone
- (925) 820-6938
- Verified
- August 17, 2026
- Licensed since
- 2004
- Phone
- (925) 820-6875
- Verified
- August 17, 2026
- Licensed since
- 2010
- Phone
- (925) 833-7110
- Verified
- August 17, 2026
- Licensed since
- 2012
- Phone
- (510) 453-7667
- Verified
- August 17, 2026
- Licensed since
- 2014
- Phone
- (925) 255-6352
- Verified
- August 17, 2026
- Licensed since
- 2020
- Phone
- (925) 984-5156
- Verified
- August 17, 2026
- Licensed since
- 2023
- Phone
- (925) 655-7384
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Advanced Plumbing And Rooter Service | #782789 | On file | 2000 |
| Legacy Mechanical & Energy Services Inc. | #808022 | On file | 2002 |
| Water Tech Systems | #838650 | On file | 2004 |
| B & H Services | #948487 | Exempt or none on file | 2010 |
| Aplus Plumbing | #972915 | On file | 2012 |
| Tankless Water Heater Experts | #992032 | On file | 2014 |
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, 21 of them registered in San Ramon. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Ramon license has been held 7 years, and the longest-standing one dates to 1989. 8 of San Ramon's 21 licenses (38.1%) 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 San Ramon: common questions
How many licensed plumbers are there in San Ramon?
21 active C-36 plumbing licenses are registered in San Ramon, out of 484 across Contra Costa County. 20 San Ramon-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. 21 active C-36 plumbing licenses are registered in San Ramon and 484 across Contra Costa County, the longest-standing issued in 1989. 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 8 of San Ramon's 21 currently carry. 37 Contra Costa County licenses expire within 90 days.