Best Licensed Plumbers in Mill Valley, CA
9 plumbing companies registered in Mill Valley 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.
- 147 active C-36 plumbing licenses in Marin County; 9 registered in Mill Valley
- 5 of Mill Valley's 9 licenses (55.6%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Mill Valley: 29 years
- Longest Mill Valley licensure: since 1980
- 14 county licenses reach their expiration date within 90 days
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- Verified
- August 17, 2026
- Licensed since
- 1980
- Phone
- (415) 721-7473
- Verified
- August 17, 2026
- Licensed since
- 1992
- Phone
- (415) 383-6317
- Verified
- August 17, 2026
- Licensed since
- 2008
- Phone
- (415) 847-5304
- Verified
- August 17, 2026
- Licensed since
- 2013
- Phone
- (415) 991-9673
- Verified
- August 17, 2026
- Licensed since
- 2024
- Phone
- (415) 419-4657
- Verified
- August 17, 2026
- Licensed since
- 1983
- Phone
- (415) 531-3151
- Verified
- August 17, 2026
- Licensed since
- 1993
- Phone
- (415) 879-1634
- Verified
- August 17, 2026
- Licensed since
- 1996
- Phone
- (650) 387-7682
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Pedro Femenia & Sons Inc. | #392227 | On file | 1980 |
| Zak Plumbing Co | #654608 | On file | 1992 |
| Altius Home Services | #914976 | On file | 2008 |
| Dill Plumbing Company | #980312 | On file | 2013 |
| Delta T Plumbing | #1122448 | On file | 2024 |
| D Benjamin Cahn DBA Zion Engineering | #440082 | Exempt or none on file | 1983 |
Marin County plumbing licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 147 active C-36 plumbing licenses in Marin County, 9 of them registered in Mill Valley. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Mill Valley license has been held 29 years, and the longest-standing one dates to 1980. 5 of Mill Valley's 9 licenses (55.6%) 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: 147 of the county's 147 licenses carry the same $25,000 bond California sets by statute. 14 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 Mill Valley: common questions
How many licensed plumbers are there in Mill Valley?
9 active C-36 plumbing licenses are registered in Mill Valley, out of 147 across Marin County. 9 Mill Valley-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. 9 active C-36 plumbing licenses are registered in Mill Valley and 147 across Marin County, the longest-standing issued in 1980. 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 5 of Mill Valley's 9 currently carry. 14 Marin County licenses expire within 90 days.