37.7585, −122.4175 A locator map appears here once a Mapbox token is configured.
Know This Place

District 9 · Block 3610, Lot 049 · ZIP 94110

3421–3431 20th Street

6-unit apartment building

  • 3 stories
  • Zoned RM-1
  • Historic status: historic resource
37.7585, −122.4175 Street View appears here once a Google Maps embed key is configured.
6,390 sq ftBuilding area
2,996 sq ftLot area
24Rooms · 6 baths
  1. 1906

    Built.

  2. Sep 1982
    Permit 8207684 $$$ $38,000

    Building use: apts.

  3. Dec 2015
    Permit 201512235861 $$$ $16,700

    Reroofing.

  4. May 2017
    Permit 201705237414 $$$ $3,000

    Like for like voluntary fire system replacement withnew control panel, smoket detector, pull station at same location. install radio communicator to communicate with central station. will comply with sffc sec 1103.761 by 2021.

  5. Jun 2017
    Permit 201706199677 $$$ $3,980

    Replace existing aluminum windows with new double pane vinyl windows. all windows located in the back of the building. u-0.31, shgc - 0.29.

  6. Aug 2017
    Permit 201708316532 $$$ $3,000

    Comply with complaint # 201795451 to repair holes in floors at rear structure with in like material.

  7. Mar 2018
    Issued Permit 201803295058 $$$ $80,000

    Two new adu units per ord# 162-17, each with 1 bedrm, 1 bath on 1st floor.

  8. Sep 2020
    Issued Permit 202009275177 $$$ $80,000

    Rev to pa202002073886 & pa201612306363: comply to complaint 201901291-revise foundation & excavate soile at rear of building (approx 126 cy).

  9. Mar 2021
    Reinstated Permit 202103317623 $$$ $115,000

    Three units: relocate kitchen and convert pantry into bathroom, and kitchen into bedroom on all 3 units. window replacement on 2nd, 3rd, 4th floors in kind. front windows replacement in kind with wood ogee and true dividers.

  10. Feb 2022
    Issued Permit 202202037231 $$$ $1

    To comply with boa 21-094 (permit application 202103317623). work in three units. kitchen and existing bathroom remodel and decay repair and replace in kind, add bathroom and washer/dryer. window replacement on 2nd, 3rd, 4th floors as in kind (same size/location and function) with front windows to be wood.

  11. Jun 2022
    Issued Permit 202206065680 $$$ $20,000

    Install new fire sprinkler system per nfpa 13 for the ground floor only. included 2" underground fire service. total 26 heads.

  12. Aug 2022
    Issued Permit 202208019674 $$$ $80,000

    3427/3429/3431 20th street: each unit: remodel existing kitchen and bathroom including any dry rot repair and replacement all in-kind. each unit add 1 bathroom and washer/dryer laundry box.

  13. Aug 2022
    Issued Permit 202208049954 $$$ $1

    To obtain final inspection for work approved under permit application 2016-1230-6363 and 2020-0207-3886: all work is complete.

  14. Sep 2023
    Issued Permit 202309267461 $$$ $15,000

    Upgrade existing fire alarm system to meet sec 1103.7.6.1. existing control panel & initiating devices stay @ their original location. existing bells will be replaced with horn strobes; install new power supply panel; 4 new pull stations & 2 new horn/strobes; new low frequency horns inside all units.

  15. Oct 2023
    Issued Permit 202310319887 $$$ $1,000

    As builts to permit application 202309267461. install 2 new monitor modules on ground fl to tie-in new floor and tamper switches to existing contorl panel.

  16. Dec 2023
    Issued Permit 202312202841 $$$ $15,000

    Siding replacement at rear walls, waterproofing side walls.

  17. May 2024
    Permit 202405061505 $$$ $3,500

    To abate nov 202307809- #2- repair window sill; #5- repair stairs; #11-repair damaged walls; #12-repair floor.

  18. Aug 2024

    1) repair /replace 3 vinyl windows at rear backyard wall, side wall 2) repair broken glass sidewall.

  19. Sep 2024
    Issued Permit 202409130714 $$$ $1

    As built revision for bpa# 201612306363 and 202002073886: structural plan update framing and foundation.

  20. Sep 2024
    Issued Permit 202409130721 $$$ $24,000

    Replace furnace & water heaters ( no fire rated assembly penetration). 2/f, 3/f & 4/f (total 6 units).

  21. Feb 2026
    Issued Permit 202602105683 $$$ $280,000

    Recommencement and completion of work approved under 201803295058 and 202009275177.

1 nominal $1 street-space permit and 2 expired permits are omitted.

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