Updated: May 27, 2026
Location
Address
5601 6th Ave S, Seattle, WA, 98108
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One Workplace Construction
One Workplace, 5601 6th Ave S, Seattle, WA (Employee: Mona Heffernan) holds a Construction Contractor, Construction Contractor license according to the Washington license board.
Their BuildZoom score of 94 ranks in the top 24% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring One Workplace, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
One Workplace Services
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One Workplace Contact Information
Phone Number: (206) 768-8000
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Address: 5601 6th Ave S, Seattle, WA 98108
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Verified License
BuildZoom confirmed this contractor's license
One Workplace License info
Verified License
| License # | ONEWOW*745J9 |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Date Issued | 04-29-2026 |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for One Workplace at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Insured
| Insurer | Zurich American Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Atlantic Specialty Insurance Company |
| Bond Value | $30,000 |
One Workplace Employees
MH
Mona Heffernan
Partner/Member