3431 20Th St

APN: 3610049 Address: 3421 20TH ST Block / Lot: 3610 / 049 Land Use: Multi-Family Residential Lot Area: 2996.0

Owner: Unknown Assessed Land Value: 1437503.0 Assessed Improvement Value: 659373.0 Total Assessed Value: 2096876.0

Last Sale Date: 2014-09-09 Last Sale Price: Unknown

Summary: complete: 8, expired: 2, issued: 18, reinstated: 3 Recent Permits: 2026-02-10 | 202602105683 | issued (2026-02-10) | Issued: 2026-02-10 | otc alterations permit | 3421 20th St | recommencement and completion of work approved under 201803295058 and 202009275177 2024-09-13 | 202409130721 | issued (2025-07-03) | Issued: 2025-07-03 | otc alterations permit | 3421 20th St | replace furnace & water heaters ( no fire rated assembly penetration). 2/f , 3/f & 4/f (total 6 units) 2024-09-13 | 202409130714 | issued (2025-07-03) | Issued: 2025-07-03 | otc alterations permit | 3421 20th St | as built revision for bpa# 201612306363 and 202002073886: structural plan update framing and foundation. 2024-08-20 | 202408209097 | complete (2024-08-23) | Issued: 2024-08-21 | otc alterations permit | 3427 20th St | 1) repair /replace 3 vinyl windows at rear backyard wall, side wall 2) repair broken glass sidewall 2024-05-06 | 202405061505 | complete (2024-08-23) | Issued: 2024-05-06 | otc alterations permit | 3427 20th St | to abate nov 202307809- #2- repair window sill; #5- repair stairs; #11-repair damaged walls; #12-repair floor 2023-12-20 | 202312202841 | issued (2024-01-19) | Issued: 2024-01-19 | otc alterations permit | 3421 20th St | siding replacement at rear walls, waterproofing side walls 2023-12-20 | 202312202841 | issued (2024-01-19) | Issued: 2024-01-19 | otc alterations permit | 3431 20th St | siding replacement at rear walls, waterproofing side walls 2023-10-31 | 202310319887 | issued (2023-10-31) | Issued: 2023-10-31 | otc alterations permit | 3421 20th St | as builts to pa 202309267461. install 2 new monitor modules on ground fl to tie-in new floor and tamper switches to (e) contorl panel.

2018-004775PRJ | Closed | 3421 20TH ST 94110 | TWO (N) ADU UNITS PER ORD# 162-17, EACH W/ 1 BEDRM, 1 BATH ON 1ST FLR. SCOPE OF WORK INCLUDES TWO NEW ALUMINUM CLAD WOOD WINDOWS AT THE GROUND FLOOR. NO EXCAVA…

Analysis Neighborhood: Mission Supervisor District: 9 Planning District: Mission (8) Police District: MISSION (Company D)

Police Incidents in Police District: Unknown Top Incident Categories: Unknown 311 Cases in Supervisor District: Unknown Top 311 Categories: Unknown

This report identifies parcel 3610049 as 3421 20TH ST 94110, located in the Mission area, Supervisor District 9, Planning District Mission (8), and SFPD MISSION District (Company D). Public assessor roll attributes available for this parcel indicate land use of Multi-Family Residential, a reported lot area of 2996.0, and assessed land and improvement values from the most recent assessor roll year. Permit activity is summarized from DBI permit records when parcel block and lot can be matched, and planning entitlement activity is retrieved from the San Francisco Planning Accela case feed when available. Neighborhood signals are summarized at the district level for context and are not parcel specific.