Best Licensed Plumbers in Alameda, CA
23 plumbing companies registered in Alameda 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.
- 488 active C-36 plumbing licenses in Alameda County; 25 registered in Alameda
- 5 of Alameda's 25 licenses (20.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Alameda: 18 years
- Longest Alameda licensure: since 1978
- 43 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1978
- Phone
- (510) 521-1576
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (510) 523-0628
- Verified
- August 17, 2026
- Licensed since
- 2010
- Phone
- (510) 390-4185
- Verified
- August 17, 2026
- Licensed since
- 2016
- Phone
- (510) 269-0299
- Verified
- August 17, 2026
- Licensed since
- 2019
- Phone
- (510) 631-4056
- Verified
- August 17, 2026
- Licensed since
- 1978
- Phone
- (510) 909-4362
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (510) 773-0002
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (510) 714-7678
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Jim Bustos Plumbing Inc. | #351329 | On file | 1978 |
| A T Weber Plumbing & Mechanical Services Inc. | #562098 | On file | 1989 |
| Ethan's Service Plumbing | #944374 | On file | 2010 |
| Big Brothers Plumbing Inc. | #1015557 | On file | 2016 |
| Plumbing Heroes | #1058605 | On file | 2019 |
| Island Construction | #350033 | Exempt or none on file | 1978 |
Alameda County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 488 active C-36 plumbing licenses in Alameda County, 25 of them registered in Alameda. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Alameda license has been held 18 years, and the longest-standing one dates to 1978. 5 of Alameda's 25 licenses (20.0%) 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: 488 of the county's 488 licenses carry the same $25,000 bond California sets by statute. 43 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 Alameda: common questions
How many licensed plumbers are there in Alameda?
25 active C-36 plumbing licenses are registered in Alameda, out of 488 across Alameda County. 23 Alameda-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. 25 active C-36 plumbing licenses are registered in Alameda and 488 across Alameda County, the longest-standing issued in 1978. 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 5 of Alameda's 25 currently carry. 43 Alameda County licenses expire within 90 days.