3921 18Th St

APN: 3584092 Address: 3921 18TH ST Block / Lot: 3584 / 092 Land Use: Single Family Residential Lot Area: 2848.0 Zoning District: RH-3 Zoning Name: RESIDENTIAL- HOUSE, THREE FAMILY Zoning General Type: Residential

Owner: Unknown Assessed Land Value: 34172.0 Assessed Improvement Value: 33492.0 Total Assessed Value: 67664.0

Last Sale Date: Unknown Last Sale Price: Unknown

Summary: complete: 1, filed: 2, issued: 1 Recent Permits: 2026-02-27 | 202602276721 | filed (2026-02-27) | Issued: Unknown | otc alterations permit | 3921 18th St | improve front facade appearance by adding decorative trims and ornaments. 2025-10-09 | 202505065904 | filed (2025-10-09) | Issued: Unknown | additions alterations or repairs | 3921 18th St | 1st fl convert storage into habitable space to include 2 bedroom, 2 bath and laundry. install a tankless water and furnace in garage. enlar… 2008-02-26 | 200802265582 | issued (2008-02-26) | Issued: 2008-02-26 | otc alterations permit | 3921 18th St | reroofing 1993-10-09 | 9317693 | complete (1993-11-23) | Issued: 1993-11-01 | additions alterations or repairs | 3921 18th St | replace (e) foundation approx 36' long raise n/fndn

No Planning Cases Found

Analysis Neighborhood: Castro/Upper Market Supervisor District: 8 Planning District: Central (7) 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 3584092 as 3921 18TH ST, located in the Castro/Upper Market area, Supervisor District 8, Planning District Central (7), and SFPD MISSION District (Company D). Public assessor roll attributes available for this parcel indicate land use of Single Family Residential, a reported lot area of 2848.0, 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.