671 21st Ave
San Francisco, CA 94121·APN 1623014A
Summary
671 21st Ave, San Francisco, CA 94121 is a multi-family residential building in the Outer Richmond neighborhood, constructed in 1923 and zoned RH-2, containing two units on a 2,996 sqft lot with a building size of 3,025 sqft; the property was last sold on December 23, 2021, and has a current total assessed value of $2,262,870 as of 2024, with $1,357,722 attributed to land and $905,148 to improvements; a notable building permit for otc alterations was completed on October 14, 2025, valued at $20,800, involving the removal and replacement of roofing material in-kind.
Location
Property Details
- APN
- 1623014A
- Year Built
- 1923
- Lot Area
- 2,996 sqft
- Building Area
- 3,025 sqft
- Units
- 2
- Use Code
- Multi-Family Residential
- Zoning
- RH-2
- Neighborhood
- Outer Richmond
- Last Sale
- Dec 23, 2021
County records
Tax history
18 years of history| Roll Year | Land | Improvements | Total Assessed | Exemptions |
|---|---|---|---|---|
| 2024 | $1,357,722 | $905,148 | $2,262,870 | $0 |
| 2023 | $1,331,100 | $887,400 | $2,218,500 | $0 |
| 2022 | $1,305,000 | $870,000 | $2,175,000 | $0 |
| 2021 | $50,983 | $80,441 | $131,424 | $7,000 |
| 2020 | $50,461 | $79,617 | $130,078 | $7,000 |
| 2019 | $49,472 | $78,056 | $127,528 | $7,000 |
| 2018 | $48,502 | $76,526 | $125,028 | $7,000 |
| 2017 | $47,551 | $75,026 | $122,577 | $7,000 |
| 2016 | $46,619 | $73,555 | $120,174 | $7,000 |
| 2015 | $45,919 | $72,451 | $118,370 | $7,000 |
| 2014 | — | — | — | $7,000 |
| 2013 | $44,817 | $70,711 | $115,528 | $7,000 |
| 2012 | $43,939 | $69,325 | $113,264 | $7,000 |
| 2011 | $43,078 | $67,966 | $111,044 | $7,000 |
| 2010 | $42,757 | $67,460 | $110,217 | $7,000 |
| 2009 | $42,859 | $67,620 | $110,479 | $7,000 |
| 2008 | $42,019 | $66,295 | $108,314 | $7,000 |
| 2007 | $41,196 | $64,996 | $106,192 | $7,000 |
Tax bill history
Coming soon. We'll show paid / unpaid / delinquent status per installment once tax bill ingestion is enabled.
Building permits
6 permits on file- Sep 24, 2025$20,800Buildingcomplete
re-roofing: remove and replace roofing material / existing roofing material (in-kind)
- Dec 2, 2024$3,500Plumbingcomplete
work category: 1m; heat pump addition and furnace with an air handler replacement.
- Dec 2, 2024$2,500Electricalissued
main electrical panel 100a to 200a upgrade. electrical line for the heat pump addition (refer to pmw20241202451)
- Aug 22, 2023$300,000Buildingfiled
interior remodel of (e) 3-story single family residence for 4 bedroom 3.5 bath layout. remodel (e) kitchen.
- Aug 8, 2000—Plumbing
replace water heater
- Aug 7, 1992$4,450Buildingcomplete
reroofing
About this record
Property data is sourced from the City and County of San Francisco's open data portals (parcels and assessor secured roll). This page is a public information summary and is not an official property record. For authoritative records, consult sfassessor.org or the SF Office of the Assessor-Recorder.