Best Licensed Plumbers in Guerneville, CA
3 plumbing companies registered in Guerneville hold current CSLB licenses, verified against official records as of August 17, 2026. All 3 are listed below, ordered by workers' compensation cover and years licensed.
- 332 active C-36 plumbing licenses in Sonoma County; 3 registered in Guerneville
- 0 of Guerneville's 3 licenses (0.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Guerneville: 4 years
- Longest Guerneville licensure: since 2009
- 21 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.
1.Calstroy
- Verified
- August 17, 2026
- Licensed since
- 2009
- Phone
- (415) 250-3215
- Verified
- August 17, 2026
- Licensed since
- 2021
- Phone
- (707) 292-1492
- Verified
- August 17, 2026
- Licensed since
- 2024
- Phone
- (707) 331-4613
Compare the top 3 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Calstroy | #933697 | Exempt or none on file | 2009 |
| Pine Ridge Plumbing | #1080579 | Exempt or none on file | 2021 |
| Morrell Plumbing | #1124994 | Exempt or none on file | 2024 |
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, 3 of them registered in Guerneville. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Guerneville license has been held 4 years, and the longest-standing one dates to 2009. 0 of Guerneville's 3 licenses (0.0%) 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: 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 Guerneville: common questions
How many licensed plumbers are there in Guerneville?
3 active C-36 plumbing licenses are registered in Guerneville, out of 332 across Sonoma County. 3 Guerneville-registered companies passed our license verification, and all 3 are listed on this page. 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. 3 active C-36 plumbing licenses are registered in Guerneville and 332 across Sonoma County, the longest-standing issued in 2009. 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 0 of Guerneville's 3 currently carry. 21 Sonoma County licenses expire within 90 days.