# Addition permit B200458346 at 800 N Michigan Ave, Chicago

Chicago Department of Buildings permit B200458346: issued Feb 24, 2026 for addition work at 800 N Michigan Ave. For permit 101073725: replacement plumbing contractor. Additional plumbing contractor. New contractor(s) listed under "other applicants and contractors" on permit certificate.

- Permit number: B200458346
- Issued: Feb 24, 2026
- Type of work: Addition (city: Administrative change, permit – express permit program)
- Status: Finished (city: Complete)
- Reported cost: Not listed
- ZIP code: 60611 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/800-n-michigan-ave/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-05 16:55 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 800 N Michigan Ave: https://nearbypermits.com/chicago/address/800-n-michigan-ave/