Best Licensed Plumbers in Plymouth, CA
3 plumbing companies registered in Plymouth 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.
- 18 active C-36 plumbing licenses in Amador County; 3 registered in Plymouth
- 1 of Plymouth's 3 licenses (33.3%) carries current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Plymouth: 39 years
- Longest Plymouth licensure: since 1986
- 1 county license reaches its expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1986
- Phone
- (209) 245-3850
- Verified
- August 17, 2026
- Licensed since
- 1986
- Phone
- (209) 245-6845
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (916) 825-4450
Compare the top 3 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Amador Mechanical Inc. | #501343 | On file | 1986 |
| Don Humphries Construction | #498943 | Exempt or none on file | 1986 |
| Mark C Johnston Inc. | #724571 | Exempt or none on file | 1996 |
Amador County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 18 active C-36 plumbing licenses in Amador County, 3 of them registered in Plymouth. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Plymouth license has been held 39 years, and the longest-standing one dates to 1986. 1 of Plymouth's 3 licenses (33.3%) carries 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: 18 of the county's 18 licenses carry the same $25,000 bond California sets by statute. 1 county license reaches its 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 Plymouth: common questions
How many licensed plumbers are there in Plymouth?
3 active C-36 plumbing licenses are registered in Plymouth, out of 18 across Amador County. 3 Plymouth-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 Plymouth and 18 across Amador County, the longest-standing issued in 1986. 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 1 of Plymouth's 3 currently carry. 1 Amador County license expires within 90 days.