Best Licensed Plumbers in Napa, CA
39 plumbing companies registered in Napa 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.
- 58 active C-36 plumbing licenses in Napa County; 40 registered in Napa
- 20 of Napa's 40 licenses (50.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Napa: 12 years
- Longest Napa licensure: since 1957
- 5 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1957
- Phone
- (707) 255-1811
- Verified
- August 17, 2026
- Licensed since
- 1978
- Phone
- (707) 252-3582
- Verified
- August 17, 2026
- Licensed since
- 1985
- Phone
- (707) 252-3941
- Verified
- August 17, 2026
- Licensed since
- 1986
- Phone
- (707) 259-0321
- Verified
- August 17, 2026
- Licensed since
- 1987
- Phone
- (707) 252-6578
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (707) 226-9502
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (707) 529-9005
- Verified
- August 17, 2026
- Licensed since
- 1998
- Phone
- (707) 944-2471
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Bell Products Inc. | #171534 | On file | 1957 |
| Ken Johns Plumbing | #364471 | On file | 1978 |
| Steve Silva Plumbing Inc. | #483676 | On file | 1985 |
| Knittel Construction Inc. | #501977 | On file | 1986 |
| Silverado Plumbing Inc. DBA Mr Rooter Plumbing | #511333 | On file | 1987 |
| Plumbing Innovations Inc. | #624540 | On file | 1991 |
Napa County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 58 active C-36 plumbing licenses in Napa County, 40 of them registered in Napa. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Napa license has been held 12 years, and the longest-standing one dates to 1957. 20 of Napa's 40 licenses (50.0%) 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: 58 of the county's 58 licenses carry the same $25,000 bond California sets by statute. 5 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 Napa: common questions
How many licensed plumbers are there in Napa?
40 active C-36 plumbing licenses are registered in Napa, out of 58 across Napa County. 39 Napa-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. 40 active C-36 plumbing licenses are registered in Napa and 58 across Napa County, the longest-standing issued in 1957. 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 20 of Napa's 40 currently carry. 5 Napa County licenses expire within 90 days.