639 21st Ave
San Francisco, CA 94121
2 bd 2 ba 1,860 sqft Built 1917 Lot 2,931 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $600,000 | $1,400,000 | $2,000,000 | $24,461 |
| 2024 | $600,000 | $1,400,000 | $2,000,000 | $24,217 |
| 2023 | $644,401 | $1,503,604 | $2,148,005 | $26,062 |
| 2022 | $631,766 | $1,474,122 | $2,105,888 | $25,576 |
| 2021 | $62,510 | $41,593 | $104,103 | $1,259 |
| 2020 | $61,870 | $41,167 | $103,037 | $1,261 |
| 2019 | $60,657 | $40,360 | $101,017 | $1,220 |
| 2018 | $59,468 | $39,569 | $99,037 | $1,181 |
| 2017 | $58,302 | $38,794 | $97,096 | $1,167 |
| 2016 | $57,159 | $38,034 | $95,193 | $1,118 |
| 2015 | $56,301 | $37,463 | $93,764 | $1,371 |
| 2014 | $55,199 | $36,730 | $91,929 | $1,076 |
| 2013 | $54,950 | $36,564 | $91,514 | $1,083 |
| 2012 | $53,873 | $35,848 | $89,721 | $967 |
| 2010 | $52,817 | $35,146 | $87,963 | $934 |
| 2009 | $52,423 | $34,884 | $87,307 | $1,169 |
| 2008 | $51,518 | $34,282 | $85,800 | $1,146 |
| 2007 | $50,508 | $33,610 | $84,118 | $912 |
Property facts
Year built
1917
Property type
single_family
Stories
—
Beds
2
Baths
2
Living area
1,860 sqft
Lot size
2,931 sqft
ZIP code
94121
City
San Francisco
Street
21st Ave
Coordinates
37.77571, -122.48045
Comparable properties nearby
Frequently asked questions
When did 639 21st Ave last sell?
No public-record sale is on file for 639 21st Ave.
What is the current tax assessment for 639 21st Ave?
The most recent total assessment for 639 21st Ave (year 2025) is $2,000,000 with $24,461 in property tax.
When was 639 21st Ave built?
639 21st Ave was built in 1917.
How does 639 21st Ave compare to others on 21st Ave?
We track 8 other properties on 21st Ave. Browse the list under "Other properties on 21st Ave" to compare beds, baths, and sale history.
What are the property facts for 639 21st Ave?
639 21st Ave is a 2 bed, 2 bath, 1,860 sqft, 2,931 sqft lot single_family.
Is 639 21st Ave a flip candidate?
No — 639 21st Ave does not appear in our flips dataset.
Is 639 21st Ave a tax-appeal candidate?
No — 639 21st Ave is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-0.8%
Implied 1-yr
-3.2%
2026 Q3
$2.17M
2026 Q4
$2.15M
ZIP 94121 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 21st Ave