# Addition permit ALT162350 at 21 Elm St, Boston

Boston Inspectional Services Department permit ALT162350: issued Sep 18, 2012 for addition work at 21 Elm St. Construction of new mudroom at existing deck area. Replace of basement stairs and half bathroom. Removal of 2 structural piers in basement.

- Permit number: ALT162350
- Issued: Sep 18, 2012
- Type of work: Addition (city: Addition, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $37,000
- ZIP code: 02129
- All permits at this address: https://nearbypermits.com/boston/address/21-elm-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 06:38 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 21 Elm St: https://nearbypermits.com/boston/address/21-elm-st/