# Alteration or repair permit 101081716 at 401 W Ontario St, Chicago

Chicago Department of Buildings permit 101081716, issued Sep 16, 2026 for 401 W Ontario St: alteration or repair. Dds CBC 2019 - erect a new partial 5th fl. Upper story addition & renovation of the existing 4-story office building in order to convert it to multi-unit residential use. New occupancy to contain 57 dwelling units. Building to be fully sprinklered. R-2 Occupancy (new). Type-iv construction. V3 companies of IL

- Permit number: 101081716
- Issued: Sep 16, 2026
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Issued (city: Active)
- Reported cost: $7,500,000
- ZIP code: 60654 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/401-w-ontario-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-02 05:56 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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