Best Licensed Plumbers in Union City, CA
11 plumbing companies registered in Union City 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; 11 registered in Union City
- 7 of Union City's 11 licenses (63.6%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Union City: 13 years
- Longest Union City licensure: since 2000
- 43 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 2003
- Phone
- (650) 326-0750
- Verified
- August 17, 2026
- Licensed since
- 2006
- Phone
- (510) 471-2373
- Verified
- August 17, 2026
- Licensed since
- 2010
- Phone
- (510) 377-3341
- Verified
- August 17, 2026
- Licensed since
- 2010
- Phone
- (510) 648-6884
- Verified
- August 17, 2026
- Licensed since
- 2021
- Phone
- (510) 557-8643
- Verified
- August 17, 2026
- Licensed since
- 2021
- Phone
- (650) 532-4866
- Verified
- August 17, 2026
- Licensed since
- 2025
- Phone
- (510) 962-1858
- Verified
- August 17, 2026
- Licensed since
- 2000
- Phone
- (510) 489-2999
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Dynamic Technical Solutions | #826782 | On file | 2003 |
| Qualified Plumbers Services Inc. | #884105 | On file | 2006 |
| Plumbing Connection | #944509 | On file | 2010 |
| Cal-tech Plumbing Co | #951321 | On file | 2010 |
| Bayvalley Mechanical Inc. | #1072787 | On file | 2021 |
| Next Level Plumbing Services | #1084094 | On file | 2021 |
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, 11 of them registered in Union City. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Union City license has been held 13 years, and the longest-standing one dates to 2000. 7 of Union City's 11 licenses (63.6%) 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 Union City: common questions
How many licensed plumbers are there in Union City?
11 active C-36 plumbing licenses are registered in Union City, out of 488 across Alameda County. 11 Union City-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. 11 active C-36 plumbing licenses are registered in Union City and 488 across Alameda County, the longest-standing issued in 2000. 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 7 of Union City's 11 currently carry. 43 Alameda County licenses expire within 90 days.