# Alteration or repair permit SF1725032 at 39 Chestnut St, Boston

Boston Inspectional Services Department permit SF1725032: issued Nov 6, 2025 for alteration or repair work at 39 Chestnut St. • Staircase Replacement: (1) Staircase o Cut out existing metal stairs and dispose o Waterproof area, specifically at connection points of new stairs, including flashing ? Clean existing concrete slab and wall via power wash ? Prep existing concrete slabs via mechanical means ? Apply primer, Sikalastic EP Primer ? Apply base coat of Sikagard-641 using a nap resin core roller ? Apply Sika Reemat into wet embedment resin and roll the scrim to achieve full saturation/embedment ? Apply additional Sikalastic-641, if needed, to ensure full scrim embedment ? Allow to cure a minimum of 12 hours ? Apply second coat of Sikagard-670 using a nap resin core roller ? Allow to cure a minimum of 12 hours ? At concrete wall, apply primer coat, using Tremco Epoxy Primer, to 100% of concrete wall and allow to dry 8-16 hours ? Once primer coat is dry, apply elastomeric waterproof coating, Tremco TREMproof 250GC and allow to dry 6-12 hours o Install new PT stringers, composite treads, trim boards, and trailing posts o Caulk all tread and riser connection points o Install new corner boards, siding, and attachment points for railing o Install composite railings o Install privacy lattice at exposed sections of the stairs o Finish Trim • ADD/ALT# 1: Staircase Replacement with Sauna Tube: (2) Staircases o Cut out existing metal stairs at (2) locations and dispose o Anchor into concrete using epoxy for lags o Install (4) 4" x 6" posts using sauna tubes o Install new PT stringers, composite treads, trim boards, and trailing posts o Caulk all tread and riser connection points o Install composite railings o Install privacy lattice at exposed sections of the stairs.

- Permit number: SF1725032
- Issued: Nov 6, 2025
- Type of work: Alteration or repair (city: Interior/Exterior Work, Short Form Bldg Permit)
- Status: Finished (city: Closed)
- Reported cost: $37,030
- ZIP code: 02108
- All permits at this address: https://nearbypermits.com/boston/address/39-chestnut-st/

---
Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 16:40 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 39 Chestnut St: https://nearbypermits.com/boston/address/39-chestnut-st/