Know This Place

3173 21st Street

Mission · San Francisco, CA 94110

  • Built 1900
  • 4-unit building with a ground-floor store
  • 2 stories
  • Zoned NC-3
  • District 9
  • Historic status: unevaluated
37.7569, −122.4183 Street View appears here once a Google Maps embed key is configured.
2,350 sq ftBuilding area
2,112.5 sq ftLot area
13Rooms · 5 bed, 3 bath

Permit history

  1. Jan 2026

    Reroofing with hot works - tear off existing roofing and replace with new modified bitumen.

    Issued Permit 202601164029 $$$ $20,000
  2. Oct 2022

    Remodel existing tenant space and prepare vanilla shell for future tenants; remodel upgrade existing all gender restroom; new lightwell; instll door controllwer @ front entrance.

    Complete Permit 202210184584 $$$ $40,000
  3. Oct 2020

    Add an adu to 1st floor.

    Cancelled Permit 202010156554 $$$ $60,000
  4. Feb 2018

    Convert existing garage area to a new retail store at 1st floor. electrical & mechanical & sprinklers design under separate permit.

    Issued Permit 201802131115 $$$ $80,000
  5. May 2016

    One unit: work on 3rd floor only. remodeling existing kitchen. change existing toilet to bathroom and enlarge existing bedroom at front of building. new furnace.

    Complete Permit 201605127255 $$$ $30,000
  6. Jan 2012

    Repair fire damage to 3rd floor rear deck, exterior siding.

    Complete Permit 201201182449 $$$ $6,600
  7. Apr 2010

    Replace bathroom window, one unit.

    Complete Permit 201004019476 $$$ $128
  8. Mar 2010

    One unit: open wall to repair dry rot in bathroom. repair dry rot on window frames. paint bath, 1 bedroom with mildewcide paint.

    Complete Permit 201003158204 $$$ $1,500
  9. Jun 2003

    Se corner of building cap foundation approx 10' replace dry rot framing in kind. cove rustic siding.

    Complete Permit 200306036104 $$$ $3,500
  10. Nov 1995

    Reroofing.

    Complete Permit 9519418 $$$ $3,800
  11. Jul 1989

    Remove illegal units, repair stairs & handrail.

    Expired Permit 8912832 $$$ $8,000
  12. Dec 1983

    Erect sign.

    Complete Permit 8312433 $$$ $850

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