401 Union St
San Francisco, CA 94133
1 bd 1 ba 669 sqft Built 1979 condo_townhome_rowhome_coop
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 | $393,687 | $590,532 | $984,219 | $12,515 |
| 2024 | $393,687 | $590,532 | $984,219 | $12,156 |
| 2023 | $378,400 | $567,601 | $946,001 | $11,953 |
| 2022 | $370,981 | $556,472 | $927,453 | $11,714 |
| 2021 | $363,707 | $545,561 | $909,268 | $11,506 |
| 2020 | $359,978 | $539,967 | $899,945 | $11,616 |
| 2019 | $352,920 | $529,380 | $882,300 | $11,223 |
| 2018 | $401,817 | $401,817 | $803,634 | $10,130 |
| 2017 | $393,939 | $393,939 | $787,878 | $9,668 |
| 2016 | $386,215 | $386,215 | $772,430 | $9,501 |
| 2015 | $380,414 | $380,414 | $760,828 | $9,300 |
| 2014 | $256,000 | $384,000 | $640,000 | $7,812 |
| 2013 | $219,600 | $329,400 | $549,000 | $6,812 |
| 2012 | $260,000 | $260,000 | $520,000 | $6,396 |
| 2010 | $260,000 | $260,000 | $520,000 | $6,418 |
| 2009 | $210,000 | $315,000 | $525,000 | $6,390 |
| 2007 | $341,251 | $341,251 | $682,502 | $7,869 |
Property facts
Year built
1979
Property type
condo_townhome_rowhome_coop
Stories
—
Beds
1
Baths
1
Living area
669 sqft
Lot size
—
ZIP code
94133
City
San Francisco
Street
Union St
Coordinates
37.80062, -122.40613
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 401 Union St last sell?
No public-record sale is on file for 401 Union St.
What is the current tax assessment for 401 Union St?
The most recent total assessment for 401 Union St (year 2025) is $984,219 with $12,515 in property tax.
When was 401 Union St built?
401 Union St was built in 1979.
How does 401 Union St compare to others on Union St?
We track 8 other properties on Union St. Browse the list under "Other properties on Union St" to compare beds, baths, and sale history.
What are the property facts for 401 Union St?
401 Union St is a 1 bed, 1 bath, 669 sqft condo_townhome_rowhome_coop.
Is 401 Union St a flip candidate?
No — 401 Union St does not appear in our flips dataset.
Is 401 Union St a tax-appeal candidate?
No — 401 Union St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+13.6%
Implied 1-yr
+54.4%
2026 Q2
$4.71M
2026 Q3
$5.05M
ZIP 94133 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St