Conversion of a basement level to ADU with 145 sqft addition off east elevation
Alteration or repair 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
- Type of work
- Alteration or repair
- Status
- Issued
- Reported cost
- $148,000
- ZIP code
- 02131
- City's category
- Change Occupancy, Long Form/Alteration Permit
- City's status
- Open
- Source
- Boston Inspectional Services Department permit data (this record)
Type of work and status are our own standard labels, so permits compare across cities. The city's wording is in the "City's category" and "City's status" rows. We show costs under $100 as not listed, because filers often enter $0 or $1 when the city doesn't require a cost.
All permits at 16-18 Ada St, and what's permitted nearby
Boston Inspectional Services Department updated its data Oct 9, 2026. We checked it Oct 11, 01:37 UTC. See the city's official records.
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