4345–4347 20th Street

Castro (Eureka Valley) · San Francisco, CA 94114

  • Built 1910
  • Two-flat
  • 3 stories
  • Zoned RH-3
  • District 8
  • Historic status: unevaluated
37.7574, −122.4365 Street View appears here once a Google Maps embed key is configured.
3,000 sq ftBuilding area
2,437.5 sq ftLot area
10Rooms · 5 bed, 3 bath

Permit history

  1. Jun 2026

    Legalization udu on 1/f and addition of state adu at basement lvl. excavate existing slab and add new, convert into habitable space. modify front & side elevations, access stairs & add landscaping. new laundry.

    Triage Permit 202606102904 $$$ $220,000
  2. Apr 2026

    To comply with nov# 202653232: repair deck and stairs, <50%, not street visible.

    Complete Permit 202604280247 $$$ $3,500
  3. May 2024

    Replace (3) windows with retrofit vinyl windows. not street visible. u-factor <0.30.

    Complete Permit 202405232836 $$$ $94,114
  4. Sep 2013

    To obtain final inspection for work approved under permit application 2004-0114-3957. all work is complete.

    Complete Permit 201309247549 $$$ $1
  5. Apr 2004

    Remove old tile & replace wth new shower pan in hower rm, relocate whtch for fan lite, install **.

    Complete Permit 200404201717 $$$ $3,500
  6. Jan 2004

    Reroofing.

    Expired Permit 200401143957 $$$ $11,880
  7. Oct 2003

    See attached termite report#031144, items#1, 2, 3, 4, 5, 6, 7.

    Complete Permit 200310288777 $$$ $38,000
  8. Jul 1993

    Horizontal.

    Complete Permit 9311887 $$$ $7,500
  9. Nov 1991

    Replace wooden sashes (about 4) & glass (3) in windows, door.

    Expired Permit 9122454 $$$ $1,634
  10. Jul 1984

    Remodel kitchen.

    Complete Permit 8407407 $$$ $9,000

1 nominal $1 street-space permit is omitted.

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