# Alteration or repair permit SF1691668 at 50 Keystone St, Boston

Boston Inspectional Services Department permit SF1691668: issued Jan 26, 2026 for alteration or repair work at 50 Keystone St. Mass Save Insulation and Air Sealing.

- Permit number: SF1691668
- Issued: Jan 26, 2026
- Type of work: Alteration or repair (city: Insulation, Short Form Bldg Permit)
- Status: Issued (city: Open)
- Reported cost: $6,744
- ZIP code: 02132
- All permits at this address: https://nearbypermits.com/boston/address/50-keystone-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-05 23:28 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 50 Keystone St: https://nearbypermits.com/boston/address/50-keystone-st/