Updated: Apr 26, 2026
Location and Projects
Address
P O BOX 21347, Concord, CA, 94521
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Richard Williamson Swimming Pool Contractor
Richard Williamson, Concord, Po Box 21347, Concord, CA (Owned by: Richard Lynn Williamson) holds a Pool And Spa Maintenance 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 Richard Williamson, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Richard Williamson Services
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Richard Williamson Contact Information
Phone Number: (909) 867-3684
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Address: P O BOX 21347, Concord, CA 94521
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Rerouting of waste piping from previously approved plans. plan check # 00042-20000-14352. a-10605 vn. total waste fixtures less than 216
Valuation:
N/A
Permit #:
00042-20000-14944
Status:
approved
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Sewer connection
Valuation:
$0
Permit #:
B201403419
Status:
FINAL
Fee:
$93
Permit Type:
N/A
Building Type:
N/A
Complete plumbing in commercial building. 11/2 meter with 11/2 r.p.backflow preventor
Valuation:
N/A
Permit #:
00042-20000-14352
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Richard Williamson License info
Verified License
| License # | 935773 |
| Status | Active |
| State | California |
| Type | Pool And Spa Maintenance |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Richard Williamson at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 411490 |
| 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 Richard Williamson at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 771749 |
| Status | Inactive |
| State | California |
| Type | General Building |
| 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 Richard Williamson 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 | Wesco Insurance Company |
| Bond Value | $15,000 |
Richard Williamson Employees
RW
Richard Allen Williamson
Sole Owner
RW
Richard Lynn Williamson
Owner
RW
Richard Thomas Williamson
Owner