# Alteration or repair permit ALT1785566 at 16-18 Ada St, Boston

Boston Inspectional Services Department permit ALT1785566: issued Jan 21, 2026 for alteration or repair work at 16-18 Ada St. Conversion of a basement level to ADU with 145 sqft addition off east elevation. Scope includes proposed egress stairs, foundation extension and habitalble living space.

- Permit number: ALT1785566
- Issued: Jan 21, 2026
- Type of work: Alteration or repair (city: Change Occupancy, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $148,000
- ZIP code: 02131
- All permits at this address: https://nearbypermits.com/boston/address/16--18-ada-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-11 03:52 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 16-18 Ada St: https://nearbypermits.com/boston/address/16--18-ada-st/