# Alteration or repair permit 100532841 at 509 N Dearborn St, Chicago

Chicago Department of Buildings permit 100532841: issued Apr 25, 2014 for alteration or repair work at 509 N Dearborn St. Interior alterations to existing technology center to include adding outside air for air handling units and other mechanical work as per plans. No change in use.

- Permit number: 100532841
- Issued: Apr 25, 2014
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Finished (city: Complete)
- Reported cost: $357,500
- ZIP code: 60654 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/509-n-dearborn-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-15 11:08 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 509 N Dearborn St: https://nearbypermits.com/chicago/address/509-n-dearborn-st/