Updated: Jun 10, 2026
Location
Address
BOX 441, Mill Valley, CA, 94942
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Duncan Leo L Plumber
Duncan Leo L at BOX 441, Mill Valley, CA 94942, held a Plumber license (#171947) with the California contractors license board with an expiration date of 11-30-1988. We last verified the license was expired on 06-09-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Duncan Leo L Services
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Duncan Leo L Contact Information
Address: BOX 441, Mill Valley, CA 94942
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Duncan Leo L License info
Inactive License
| License # | 171947 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Duncan Leo L at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
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BuildZoom Score
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- *No active license on file. If you are Duncan Leo L, click “This is My Business” to update your information.
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $1,000 |
Duncan Leo L Employees
LD
Leo L Duncan
Sole Owner