# Mechanical (HVAC) permit 100373639 at 431 N Dearborn St, Chicago

Chicago Department of Buildings permit 100373639: issued Nov 22, 2010 for mechanical (hvac) work at 431 N Dearborn St. Install an air cooled condensing unit and evaporator coil to an existing roof top air handler.one carrier carrier 30 ton, two compressors, remote, air cooled, r410a.

- Permit number: 100373639
- Issued: Nov 22, 2010
- Type of work: Mechanical (HVAC) (city: Permit - easy permit process)
- Status: Issued (city: not listed)
- Reported cost: Not listed
- ZIP code: 60654 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/431-n-dearborn-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-12 12:12 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 431 N Dearborn St: https://nearbypermits.com/chicago/address/431-n-dearborn-st/