# Alteration or repair permit 101085509 at 900 W Nelson St, Chicago

Chicago Department of Buildings permit 101085509: issued Aug 25, 2026 for alteration or repair work at 900 W Nelson St. Dds revision to permit 101010263 to include a new connection at the 3rd floor between the cac building and existing stone building. Work to include modifications to existing smoke compartments with updated 4 hour rated barrier, new idf room, and new corridor. No change in use. (I-a construction, i-2 institutional occupancy).

- Permit number: 101085509
- Issued: Aug 25, 2026
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Finished (city: Complete)
- Reported cost: $200,000
- ZIP code: 60657 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/900-w-nelson-st/

---
Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-06 13:01 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. The City of Chicago makes no claims as to the content, accuracy, timeliness, or completeness of any of the data provided at this site. The data provided at this site is subject to change at any time. It is understood that the data provided at this site is being used at one’s own risk.

Every permit at 900 W Nelson St: https://nearbypermits.com/chicago/address/900-w-nelson-st/