# Alteration or repair permit 101067922 at 31 S Mason Ave, Chicago

Chicago Department of Buildings permit 101067922: issued Aug 29, 2025 for alteration or repair work at 31 S Mason Ave. Self-cert 2019 CBRC: fire restoration w/ interior alteration & code upgrades for existing 2 du, in 2-story w/basement building no change in dwelling unit count (occupancy group R-5; type iii-a construction).

- Permit number: 101067922
- Issued: Aug 29, 2025
- Type of work: Alteration or repair (city: Permit - renovation/alteration)
- Status: Issued (city: Active)
- Reported cost: $180,000
- ZIP code: 60644 (derived from location)
- All permits at this address: https://nearbypermits.com/chicago/address/31-s-mason-ave/

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Source: Chicago Department of Buildings permit data (https://data.cityofchicago.org/d/ydr8-5enu). Checked 2026-10-17 21:51 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

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Every permit at 31 S Mason Ave: https://nearbypermits.com/chicago/address/31-s-mason-ave/