Best Licensed Plumbers in San Leandro, CA
54 plumbing companies registered in San Leandro 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; 55 registered in San Leandro
- 30 of San Leandro's 55 licenses (54.5%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in San Leandro: 15 years
- Longest San Leandro licensure: since 1959
- 43 county licenses reach their expiration date within 90 days
We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.
- Verified
- August 17, 2026
- Licensed since
- 1959
- Phone
- (510) 483-5473
- Verified
- August 17, 2026
- Licensed since
- 1969
- Phone
- (925) 671-9200
- Verified
- August 17, 2026
- Licensed since
- 1978
- Phone
- (510) 777-9100
- Verified
- August 17, 2026
- Licensed since
- 1985
- Phone
- (510) 483-3620
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (510) 670-1115
- Verified
- August 17, 2026
- Licensed since
- 1993
- Phone
- (510) 551-7900
- Verified
- August 17, 2026
- Licensed since
- 1998
- Phone
- (510) 336-3496
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (510) 352-8501
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| J R Pierce Plumbing Company | #188225 | On file | 1959 |
| Cal Phase Electric Inc. | #256896 | On file | 1969 |
| T N T Plumbing Company | #354861 | On file | 1978 |
| Sequeira Plumbing | #483971 | On file | 1985 |
| Pro Rooter Inc. | #636652 | On file | 1992 |
| Bayview Plumbing | #665946 | On file | 1993 |
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, 55 of them registered in San Leandro. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median San Leandro license has been held 15 years, and the longest-standing one dates to 1959. 30 of San Leandro's 55 licenses (54.5%) 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 San Leandro: common questions
How many licensed plumbers are there in San Leandro?
55 active C-36 plumbing licenses are registered in San Leandro, out of 488 across Alameda County. 54 San Leandro-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. 55 active C-36 plumbing licenses are registered in San Leandro and 488 across Alameda County, the longest-standing issued in 1959. 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 30 of San Leandro's 55 currently carry. 43 Alameda County licenses expire within 90 days.