# Alteration or repair permit ALT1860531 at 21 Monsignor Patrick J. Lydon Wy, Boston

Boston Inspectional Services Department permit ALT1860531: issued Sep 10, 2026 for alteration or repair work at 21 Monsignor Patrick J. Lydon Wy. Convert existing basement into a code-compliant ADU with new entrances, egress windows, framing, insulation, drywall, full bathroom and kitchen finishes, tile flooring, trim, painting, interior carpentry upgrades.

- Permit number: ALT1860531
- Issued: Sep 10, 2026
- Type of work: Alteration or repair (city: Change Occupancy, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $109,850
- ZIP code: 02124
- All permits at this address: https://nearbypermits.com/boston/address/21-monsignor-patrick-j.-lydon-wy/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-05 19:17 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 21 Monsignor Patrick J. Lydon Wy: https://nearbypermits.com/boston/address/21-monsignor-patrick-j.-lydon-wy/