ZAK PLUMBING CO
License
- Status
- CLEAR · LIC-Cont in eff
- First issued
- September 22, 1992
- Expires
- September 24, 2026
- Entity
- Sole Owner
- Address of record
- P O BOX 281, Mill Valley, CA 94942
- Phone of record
- (415) 383 6317
Contractor bond
- Surety
- WESTERN SURETY COMPANY
- Bond number
- 67745856
- Amount
- $25,000
- Effective
- February 5, 2026
Workers’ compensation
- Carrier
- AMTRUST INSURANCE COMPANY
- Policy number
- SWC1554373
- Effective
- May 6, 2026
- Expires
- May 6, 2027
Are they licensed for your job?
A California contractor may only contract for work their classification covers. Pick the job and this reads the license on file against it.
Licensed to perform
A contractor may only contract for work within their classifications. See all 9 licensed plumbing contractors in Mill Valley.
People on this license
| Name | Title | Since | Through |
|---|---|---|---|
| ZAK SPENCER JOSEPH | Continuance Granted | September 24, 2025 | Current |
| ZAK JOHN ERWIN | Deceased | September 24, 2025 | September 24, 2025 |
| ZAK JOHN ERWIN | Sole Owner | September 22, 1992 | September 24, 2025 |
| ZAK JOHN ERWIN | Sole Owner | December 17, 2002 | January 1, 2004 |
Verified status badge
Put this on your website or in a bid packet. It reads the state’s record live every time someone loads it, so it is never a screenshot of a good day. Free, and you don’t need to claim this listing to use it.
<a href="https://bookofbuilders.com/license/654608" target="_blank" rel="noopener">
<img src="https://bookofbuilders.com/badge/654608.svg" alt="ZAK PLUMBING CO — California contractor license #654608 status, verified against CSLB records" width="268" height="76">
</a>The badge shows whatever the CSLB record says — including a suspension or lapsed coverage. There is no paid version and no way to change what it displays. That is what makes it worth showing. The same data as JSON if you’d rather build your own.
Is this your license?
Claim this page to add your photos, description, service area and contact details. The state’s record above stays exactly as it is — claiming adds to a page, it never edits or hides anything the CSLB reports.
Source: California Contractors State License Board public records. Coverage lapse is evaluated against today’s date; all other fields reflect the latest weekly CSLB file. Confirm at the CSLB’s official record before signing a contract.