# Alteration or repair permit 100747602 at 641 W Lake St, Chicago

Chicago Department of Buildings permit 100747602: issued Mar 8, 2018 for alteration or repair work at 641 W Lake St. Interior build-out of existing white-box office space. New interior partitions and interior finishes. Existing mechanical and electrical to be modified to accommodate new ductwork and lighting. Plumbing is existing to remain. Existing and proposed building use is class E -business.

- Permit number: 100747602
- Issued: Mar 8, 2018
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Finished (city: Complete)
- Reported cost: $250,000
- 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 2026-10-16 08:51 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/