# Addition or alteration permit 6559018-CN at 601 Union St, Seattle

Seattle Department of Construction and Inspections permit 6559018-CN, issued Mar 10, 2017 for 601 Union St: addition or alteration. Construct alterations to lobbies on levels 1-4 and level 41 entry plaza and 6th and Union entry of existing commercial building (Two Union Square) per plan.

- Permit number: 6559018-CN
- Issued: Mar 10, 2017
- Type: Addition or alteration
- Status: Completed
- Reported cost: $19,000,000
- ZIP code: 98101
- All permits at this address: https://nearbypermits.com/seattle/address/601-union-st/

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr). Checked 2026-10-01 10:04 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/