Know This Place

3900–3922 21st Street

Castro (Eureka Valley) · San Francisco, CA 94114

  • Built 1910
  • 3-unit apartment building
  • Zoned RH-2
  • District 8
  • Historic status: unevaluated
37.7562, −122.4349 Street View appears here once a Google Maps embed key is configured.
4,199 sq ftBuilding area
4,373 sq ftLot area
13Rooms · 5 baths

Permit history

  1. Jun 2026

    Reroofing: remove and replace roofing material / existing roofing material (in-kind).

    Issued Permit 202606183538 $$$ $27,165
  2. Mar 2023

    Repair front entrance with concrete pad and stairs- add pavers and turf to side yard.

    Complete Permit 202303063079 $$$ $5,000
  3. Mar 2023

    Recommencement and completion of work approved under permit application 201804025291.

    Issued Permit 202303063099 $$$ $10,000
  4. Oct 2022

    (11) windows replacement: replace windows kind for kind- size for size. retrofit install street visible (7) new aluminum clad over wood 4 existing are vinyl, 3 existing are wood not street visible (4) windows with new vinyl. u-factor < =0.30.

    Complete Permit 202210063862 $$$ $13,986
  5. Jul 2022

    Remove load bearing wall and misc voluntary structural upgrade ref permit application 2022-01226-6655.

    Complete Permit 202207067813 $$$ $55,000
  6. Jan 2022

    Soft demolition- remove sheetrock and insulate entire one unit. no plans kitchen and bath remodel: (rear building).

    Complete Permit 202201266655 $$$ $2,000
  7. Apr 2018

    Kitchen & bathroom remodel.

    Expired Permit 201804025291 $$$ $36,700
  8. Mar 2007

    Bathroom upgrade / remodel. change out vanity, patch up sheetrock, tile, paint. no electrical work.

    Complete Permit 200703237065 $$$ $5,000
  9. Oct 1999

    Replace 11 aluminum windows to vinyl one @front side.

    Complete Permit 9922174 $$$ $3,500
  10. Mar 1992

    Reroofing.

    Expired Permit 9204019 $$$ $2,500
  11. Dec 1990

    Reroofing.

    Expired Permit 9025945 $$$ $2,400

Not yet documented: the architect and builder and the early residents. Know any of it? Tell us — just describe it in plain words.