To create an internal ADU by splitting 3rd floor from the 2nd floor unit from which it is currently combined
Alteration or repair at 91 Walter St, Boston
Boston Inspectional Services Department permit ALT1814542: issued Oct 16, 2026 for alteration or repair work at 91 Walter St. To create an internal ADU by splitting 3rd floor from the 2nd floor unit from which it is currently combined with in an existing 2 family home. There will be no additions or changes to the building envelope, and the unit will be sprinkled per code and meet all requirements.
- Permit number
- ALT1814542
- Issued
- Type of work
- Alteration or repair
- Status
- Issued
- Reported cost
- $30,000
- 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 91 Walter St, and what's permitted nearby
Boston Inspectional Services Department updated its data Oct 17, 2026. We checked it Oct 17, 22:33 UTC. See the city's official records.
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