# Addition permit ALT1664594 at 12 Prospect St, Boston

Boston Inspectional Services Department permit ALT1664594: issued May 13, 2025 for addition work at 12 Prospect St. EXISTING TWO FAMILY RENOVATION per plans to include fire alarm &; 13R sprinkler system.;e[Plans] Filed.

- Permit number: ALT1664594
- Issued: May 13, 2025
- Type of work: Addition (city: Addition, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $550,000
- ZIP code: 02129
- All permits at this address: https://nearbypermits.com/boston/address/12-prospect-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 05:26 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 12 Prospect St: https://nearbypermits.com/boston/address/12-prospect-st/