# Alteration or repair permit 100687990 at 641 W Lake St, Chicago

Chicago Department of Buildings permit 100687990: issued Apr 8, 2017 for alteration or repair work at 641 W Lake St. Self-cert: tenant improvement on the 4th floor and mezzanine level in existing 5 story brick commercial office building (with no basement), suite 402 and 404 will be combined as one suite. Occupancy will be increased from 39 persons to 117 persons. No plumbing work.

- Permit number: 100687990
- Issued: Apr 8, 2017
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Finished (city: Complete)
- Reported cost: $100,000
- ZIP code: 60661 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/641-w-lake-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-15 20:14 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 641 W Lake St: https://nearbypermits.com/chicago/address/641-w-lake-st/