# Alteration or repair permit 202607134895 at 647 21st Av, San Francisco

SF Department of Building Inspection permit 202607134895: issued Jul 13, 2026 for alteration or repair work at 647 21st Av. replace 16 windows in kind in the yard (not facing the street) with vinyl windows - same size, same location, same opening, same operation, no structural work. maintain eero per cbc 1031 as required. replace 45 sq ft of siding at the rear in kind due to dryrot - no replacement of wall studs, no str.

- Permit number: 202607134895
- Issued: Jul 13, 2026
- Type of work: Alteration or repair (city: otc alterations permit, 1 family dwelling)
- Status: Issued (city: issued)
- Reported cost: $9,500
- ZIP code: 94121
- All permits at this address: https://nearbypermits.com/san-francisco/address/647-21st-av/

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Source: SF Department of Building Inspection permit data (https://data.sf.gov/d/i98e-djp9). Checked 2026-10-18 06:41 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 647 21st Av: https://nearbypermits.com/san-francisco/address/647-21st-av/