# Alteration or repair permit 101074435 at 900 W Windsor Ave, Chicago

Chicago Department of Buildings permit 101074435: issued Nov 3, 2025 for alteration or repair work at 900 W Windsor Ave. Spr / 2019 CBRC: installation of a 22.410 kw dc, 19.00 kw ac system on the roof of an existing 3-story residential building as per plans. (Structural peer review) (occupancy group: R-2 / type v-b construction).

- Permit number: 101074435
- Issued: Nov 3, 2025
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Issued (city: Active)
- Reported cost: $59,815
- ZIP code: 60640 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/900-w-windsor-ave/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-12 10:00 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 900 W Windsor Ave: https://nearbypermits.com/chicago/address/900-w-windsor-ave/