Location and Projects
Williams Underground Construction Plumber
Williams Underground Construction Inc, 930 Natoma Ct, Walnut Creek, CA (Employees: Joshua Derek Williams and Michael Dorn Williams) holds a Plumbing license and 2 other licenses according to the California license board.
Their BuildZoom score of 94 ranks in the top 24% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Williams Underground Construction Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Williams Underground Construction Inc Services
Williams Underground Construction Inc Contact Information
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Building Permits by Williams Underground Construction Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
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Williams Underground Construction Inc License info
Verified License
| License # | 311842 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Williams Underground Construction Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 787857 |
| Status | Active |
| State | California |
| Type | Plumbing, Sanitation System |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Williams Underground Construction Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 699390 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| Business Type | Corporation |
- 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 Williams Underground Construction Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | Hartford Casualty Insurance Company |
63
Permits
- Building permit records show that Williams Underground Construction Inc has worked on 63 permitted projects.