# Roofing permit 100347608 at 446 E Ontario St, Chicago

Chicago Department of Buildings permit 100347608: issued Jun 4, 2010 for roofing work at 446 E Ontario St. Remove existing river rock ballast on the main roof at the green roof areas & lower to the ground for disposal off site. Remove existing deteriorated polystyrene insulation & dispose of off site. Install new layer of extruded polystyrene insulattion & drainage composite mat in the designated area. Install live roof fully mature green roof modules- same as existing roof; subject to field inspections.

- Permit number: 100347608
- Issued: Jun 4, 2010
- Type of work: Roofing (city: Permit - easy permit process)
- Status: Issued (city: not listed)
- Reported cost: $76,429
- ZIP code: 60611 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/446-e-ontario-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-06 12:38 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 446 E Ontario St: https://nearbypermits.com/chicago/address/446-e-ontario-st/