# Alteration or repair permit 101081161 at 4129 W 21st St, Chicago

Chicago Department of Buildings permit 101081161: issued Aug 6, 2026 for alteration or repair work at 4129 W 21st St. Self-cert 2019-cbrc: interior remodeling of two existing residential dwelling units in an existing 2-story brick building. Work includes duplexing the first-floor unit with the basement, new interior partition walls, finishes, and modifications to HVAC, plumbing, and electrical systems (occupancy group R-5; type IIIB construction).

- Permit number: 101081161
- Issued: Aug 6, 2026
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Issued (city: Active)
- Reported cost: $150,000
- ZIP code: 60623 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/4129-w-21st-st/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-06 12:01 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 4129 W 21st St: https://nearbypermits.com/chicago/address/4129-w-21st-st/