Best Licensed Plumbers in Hayward, CA
76 plumbing companies registered in Hayward 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; 76 registered in Hayward
- 39 of Hayward's 76 licenses (51.3%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Hayward: 5 years
- Longest Hayward licensure: since 1940
- 43 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1940
- Phone
- (510) 887-0900
- Verified
- August 17, 2026
- Licensed since
- 1970
- Phone
- (510) 537-4044
- Verified
- August 17, 2026
- Licensed since
- 1978
- Phone
- (510) 785-9099
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (510) 712-2138
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (510) 723-0001
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (209) 456-0779
- Verified
- August 17, 2026
- Licensed since
- 1999
- Phone
- (510) 471-4282
- Verified
- August 17, 2026
- Licensed since
- 2003
- Phone
- (510) 635-9830
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| D W Nicholson Corporation | #68847 | On file | 1940 |
| Aqua Duct Plumbing Contractors | #261195 | On file | 1970 |
| R S Construction Co | #362691 | On file | 1978 |
| T V P C Inc. | #560039 | On file | 1989 |
| Buckley Plumbing And Engineering Inc. | #727798 | On file | 1996 |
| West Coast Construction | #766497 | On file | 1999 |
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, 76 of them registered in Hayward. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Hayward license has been held 5 years, and the longest-standing one dates to 1940. 39 of Hayward's 76 licenses (51.3%) 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 Hayward: common questions
How many licensed plumbers are there in Hayward?
76 active C-36 plumbing licenses are registered in Hayward, out of 488 across Alameda County. 76 Hayward-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. 76 active C-36 plumbing licenses are registered in Hayward and 488 across Alameda County, the longest-standing issued in 1940. 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 39 of Hayward's 76 currently carry. 43 Alameda County licenses expire within 90 days.