# Addition permit ALT1174348 at 16 Mason St, Boston

Boston Inspectional Services Department permit ALT1174348: issued Sep 29, 2021 for addition work at 16 Mason St. Add a bedroom and bathroom to unit one and unit two. [ePlan].

- Permit number: ALT1174348
- Issued: Sep 29, 2021
- Type of work: Addition (city: Addition, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $125,000
- ZIP code: 02136
- All permits at this address: https://nearbypermits.com/boston/address/16-mason-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-05 17:25 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 16 Mason St: https://nearbypermits.com/boston/address/16-mason-st/