# Alteration or repair permit 100741052 at 321 N Clark St, Chicago

Chicago Department of Buildings permit 100741052: issued Apr 30, 2018 for alteration or repair work at 321 N Clark St. Interior and exterior alterations to an existing 35 story office building. Work to include lobby, ll1 and ll2, elevator modernization, new mezzanine, new communicating stair, curtain wall modifications, new entrance canopy and plaza repairs as per plans. Structural peer review.

- Permit number: 100741052
- Issued: Apr 30, 2018
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Finished (city: Complete)
- Reported cost: $23,000,000
- ZIP code: 60654 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/321-n-clark-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-09 04:25 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 321 N Clark St: https://nearbypermits.com/chicago/address/321-n-clark-st/