1100 Union St
San Francisco, CA 94109
4 bd 6 ba 5,300 sqft Built 1929 Lot 8,939 sqft condos
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 | $1,082,238 | $721,488 | $1,803,726 | $22,100 |
| 2024 | $1,082,238 | $721,488 | $1,803,726 | $21,462 |
| 2023 | $1,040,214 | $693,473 | $1,733,687 | $21,129 |
| 2022 | $1,019,818 | $679,876 | $1,699,694 | $20,726 |
| 2021 | $999,822 | $666,546 | $1,666,368 | $19,757 |
| 2020 | $989,571 | $659,712 | $1,649,283 | $19,817 |
| 2019 | $970,168 | $646,777 | $1,616,945 | $19,134 |
| 2018 | $951,146 | $634,096 | $1,585,242 | $18,490 |
| 2017 | $932,497 | $621,663 | $1,554,160 | $18,272 |
| 2016 | $914,213 | $609,474 | $1,523,687 | $17,988 |
| 2015 | $900,481 | $600,320 | $1,500,801 | $18,017 |
| 2014 | $882,842 | $588,561 | $1,471,403 | $17,541 |
| 2013 | $878,853 | $585,902 | $1,464,755 | $17,658 |
| 2012 | $861,621 | $574,414 | $1,436,035 | $16,961 |
| 2010 | $844,727 | $563,151 | $1,407,878 | $16,429 |
| 2009 | $838,414 | $558,943 | $1,397,357 | $16,177 |
| 2008 | $823,928 | $549,286 | $1,373,214 | $16,122 |
| 2007 | $807,773 | $538,516 | $1,346,289 | $15,316 |
Property facts
Year built
1929
Property type
condos
Stories
—
Beds
4
Baths
6
Living area
5,300 sqft
Lot size
8,939 sqft
ZIP code
94109
City
San Francisco
Street
Union St
Coordinates
37.79966, -122.41768
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 1100 Union St last sell?
No public-record sale is on file for 1100 Union St.
What is the current tax assessment for 1100 Union St?
The most recent total assessment for 1100 Union St (year 2025) is $1,803,726 with $22,100 in property tax.
When was 1100 Union St built?
1100 Union St was built in 1929.
How does 1100 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 1100 Union St?
1100 Union St is a 4 bed, 6 bath, 5,300 sqft, 8,939 sqft lot condos.
Is 1100 Union St a flip candidate?
No — 1100 Union St does not appear in our flips dataset.
Is 1100 Union St a tax-appeal candidate?
No — 1100 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
+3.6%
Implied 1-yr
+14.5%
2026 Q3
$4.1M
2026 Q4
$4.1M
ZIP 94109 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St