# Addition permit ALT718173 at 70 Winthrop St, Boston

Boston Inspectional Services Department permit ALT718173: issued Apr 19, 2019 for addition work at 70 Winthrop St. This proposal is for the addition of a 225 s.f. roof;DECK on a single family residence.;The roof deck will be located on the upper portion of an existing mansard roof and will be accessed via. a new set of stairs and a hatch built on a raised plinth. (SEE ATTACHMENT FOR PLANS) *Two family on record.

- Permit number: ALT718173
- Issued: Apr 19, 2019
- Type of work: Addition (city: Addition, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $75,000
- ZIP code: 02129
- All permits at this address: https://nearbypermits.com/boston/address/70-winthrop-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-10 04:12 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 70 Winthrop St: https://nearbypermits.com/boston/address/70-winthrop-st/