# Alteration or repair permit SF1730556 at 21 Mercer St, Boston

Boston Inspectional Services Department permit SF1730556: issued Jul 19, 2025 for alteration or repair work at 21 Mercer St. Residential weatherization/air sealing. No structural changes. (56319).

- Permit number: SF1730556
- Issued: Jul 19, 2025
- Type of work: Alteration or repair (city: Insulation, Short Form Bldg Permit)
- Status: Finished (city: Closed)
- Reported cost: $1,000
- ZIP code: 02127
- All permits at this address: https://nearbypermits.com/boston/address/21-mercer-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 13:15 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 21 Mercer St: https://nearbypermits.com/boston/address/21-mercer-st/