Best Licensed Plumbers in Santa Rosa, CA
135 plumbing companies registered in Santa Rosa 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.
- 332 active C-36 plumbing licenses in Sonoma County; 140 registered in Santa Rosa
- 83 of Santa Rosa's 140 licenses (59.3%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Santa Rosa: 9 years
- Longest Santa Rosa licensure: since 1974
- 21 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1974
- Phone
- (707) 585-1171
- Verified
- August 17, 2026
- Licensed since
- 1976
- Phone
- (707) 584-0714
- Verified
- August 17, 2026
- Licensed since
- 1983
- Phone
- (707) 528-7168
- Verified
- August 17, 2026
- Licensed since
- 1988
- Phone
- (707) 575-1500
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (707) 584-5880
- Verified
- August 17, 2026
- Licensed since
- 1989
- Phone
- (707) 591-9901
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (707) 545-4979
- Verified
- August 17, 2026
- Licensed since
- 1991
- Phone
- (707) 626-9095
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| C B S Plumbing & Heating Inc. | #294171 | On file | 1974 |
| Action Plumbing And Heating Maintenance | #325110 | On file | 1976 |
| Constantini Heating And Air Conditioning | #434351 | On file | 1983 |
| Le Duc & Dexter Inc. | #548129 | On file | 1988 |
| Roberts Service & Construction | #556014 | On file | 1989 |
| Custom Plumbing Of Northern California Inc. | #582526 | On file | 1989 |
Sonoma County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 332 active C-36 plumbing licenses in Sonoma County, 140 of them registered in Santa Rosa. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Santa Rosa license has been held 9 years, and the longest-standing one dates to 1974. 83 of Santa Rosa's 140 licenses (59.3%) 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: 331 of the county's 332 licenses carry the same $25,000 bond California sets by statute. 21 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 Santa Rosa: common questions
How many licensed plumbers are there in Santa Rosa?
140 active C-36 plumbing licenses are registered in Santa Rosa, out of 332 across Sonoma County. 135 Santa Rosa-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. 140 active C-36 plumbing licenses are registered in Santa Rosa and 332 across Sonoma County, the longest-standing issued in 1974. 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 83 of Santa Rosa's 140 currently carry. 21 Sonoma County licenses expire within 90 days.