# Alteration or repair permit B2500902 at 644 Massachusetts Ave NE 302, Washington

DC Department of Buildings permit B2500902: issued May 4, 2026 for alteration or repair work at 644 Massachusetts Ave NE 302. On Upper 3 Floors: Cut out and replace masonry mortar above the 3rd floor windows to the roof. Remove and replace the window perimeter sealant. Clean work area and adjacent surfaces. Rinse floors below work area.

- Permit number: B2500902
- Issued: May 4, 2026
- Type of work: Alteration or repair (city: Construction, alteration and repair)
- Status: Issued (city: Permit issued)
- Reported cost: Not listed
- ZIP code: 20002
- All permits at this address: https://nearbypermits.com/washington-dc/address/644-massachusetts-ave-ne-302/

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Source: DC Department of Buildings permit data (https://opendata.dc.gov/datasets/7296e6392349498bb6ba6ba3db836644_18), CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Checked 2026-10-05 01:56 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/