# Fence, wall or deck permit SF634121 at 21 Commonwealth Av, Boston

Boston Inspectional Services Department permit SF634121: issued Sep 7, 2016 for fence, wall or deck work at 21 Commonwealth Av. • Brownstone repair with Mimic repair mortar • Brownstone coating to meet BBAC approval. • Remove loose and delaminated coatings and spalled stone from steps, repair with Conproco Mimic • Coat repaired steps with Conproco Topcoat to match façade • Cut out and remove existing sealant from window perimeters and install new polyurethane building sealant. • Replace compromised wood trim at mansard window bases • Prepare and paint mansard window trim to match façade coating • Prepare and paint steel railing and window grates with epoxy primer and polyurethane marine grade paint • Prepare and paint all window frames and trim on front façade • Prepare and paint front door and ceiling • Brownstone repair at Stone Railing and outside wall of stone stairs • Remove loose and delaminated coatings and spalled stone from Stone Garden Railing and outside wall of stone steps • Repair with Conproco Mimic • Coat Repaired stone areas with Conproco Conprolastic.

- Permit number: SF634121
- Issued: Sep 7, 2016
- Type of work: Fence, wall or deck (city: Other, Short Form Bldg Permit)
- Status: Issued (city: Open)
- Reported cost: $127,545
- ZIP code: 02116
- All permits at this address: https://nearbypermits.com/boston/address/21-commonwealth-av/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-07 10:04 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 21 Commonwealth Av: https://nearbypermits.com/boston/address/21-commonwealth-av/