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1801 Union Street, San Francisco, CA 94123 Property Information

1801 Union Street, San Francisco, CA 94123 Property Information

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  • Owner
  • Documents
  • Tax
  • Neighborhood
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1801 Union Street, San Francisco, CA 94123
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Address

Primary address 1801 Union Street, San Francisco
Zip code 94123
County San Francisco
Neighborhood Cow Hollow
Parcel ID 0543-001

Sales & Tax Overview for 1801 Union Street, San Francisco

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Sale date 04/28/2000
Sale price $29,000
Arm's length
Property tax $28,092

Lot & Building Information for 1801 Union Street, San Francisco

Building sqft 4,278
Building class Apartments 5 to 14 Units (A5)
Acreage 0.054
Rooms 11
Units 7
Year built 1906
Stories 2
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Zoning, Use & Area Overview

Walk Score
Transit Score
Bike Score


Zoning district
School district San Francisco Unified School District

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Other Property Data for 1801 Union Street, San Francisco

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About 1801 Union Street, San Francisco

What is the year built & the total sq. ft. for 1801 Union Street, San Francisco, CA 94123?

1801 Union Street, San Francisco, CA 94123 was built in 1906 and has a total of 4,278 square feet.

What is the assessed value of 1801 Union Street, San Francisco, CA 94123 and the property tax paid?

Assessed at $2,375,228, the tax amount paid for 1801 Union Street, San Francisco, CA 94123 is $28,091.

When was 1801 Union Street, San Francisco, CA 94123 last sold?

1801 Union Street, San Francisco, CA 94123 was last sold in 05/06/2016.

How many residential units does this building have?

This building has 7 residential unit(s).

Ownership Information

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Real Estate Reports:
Laura Pop-Badiu, May 07, 2026 Locked-In Owners, Mobile Renters: Homeowners Stay Put as Renters Move 3.7x More Across Largest U.S. Cities 
Renters became the primary drivers of long-distance mobility across the largest U.S. cities, moving 3.7 times more than owners in 2024, as high mortgage rates and housing costs kept many homeowners in place.
Eliza Theiss, Apr 23, 2026 $4.6M Hudson Yards Maintains Top Spot, Luxury Sales in Malba Set $2.5M Price Record for Queens
Despite prices declining, Hudson Yards remained the most expensive NYC neighborhood, but TriBeCa’s growth closed the gap to under $400,000, while Malba set a new historic price record for Queens at $2.5 million, securing the highest ranking ever for the borough at #5.
Eliza Theiss, Apr 15, 2026 2026 Q1 Foreclosure Report: Brooklyn Filings Fall Sharply, Bronx & Staten Island Hit New Peaks
Behind a deceptively mild citywide downtick, borough foreclosure markets pulled into significantly diverging paths as Brooklyn cases were nearly halved and the Bronx hit a new, record high. Meanwhile, Queens remained unchanged, Staten Island surged back up and Manhattan cooled slowly.
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Past Sales & Property History for 1801 Union Street, San Francisco

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Sale date Sale price Buyer name Seller name
04/28/2000 $29,000

Title Documents for 1801 Union Street, San Francisco

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Date Type Amount Party 1 Party 2 Maturity Document Doc image
07/13/2021 Affidavit of Death
05/06/2016 Trust Transfer Deed
04/01/2005 Declaration of Use Limitation
04/28/2000 Deed
04/28/2000 Deed
04/28/2000 Deed
04/28/2000 Deed
06/26/1992 Deed
06/01/1992 Deed
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R: Recorded date
D: Document date

Property Taxes for 1801 Union Street, San Francisco

Access detailed property tax data for 1801 Union Street, San Francisco, CA 94123. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year: 2025-2026
Property tax $28,092
Market value $2,375,228

Assessment History for 1801 Union Street, San Francisco

Here's the assessment & property tax history for 1801 Union Street, San Francisco, including the evolution of the total tax rate and corresponding property tax.

Year Assessment value Total tax rate Property tax Year over year change
2025-2026 $2,375,228 1.1827 $28,092 +3.07%
2024-2025 $2,326,811 1.1714 $27,256 +1.45%
2023-2024 $2,281,251 1.1777 $26,866 +1.82%
2022-2023 $2,236,731 1.1797 $26,387 +1.76%
2021-2022 $2,192,914 1.18248 $25,931 -0.31%

San Francisco residential market stats

Median Sale Price
$1,385,000
2.6% YoY
Median Price/Sqft
$1,098
7.5% YoY
San Francisco County Median Sale Price
$1,385,000
2.6% YoY

Access a detailed real estate market overview of San Francisco so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in San Francisco and compare it to other neighborhoods in San Francisco County.

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Demographics by Zip Code

Total population 24,054
Median age 32.9
Average household income $319,606
Family households 34.0%
Occupied housing units 12,605
Owner occupied units 30.4%
Average number of people per household 1.9
Median year structure built 1938
Median value for units with a mortgage $2,000,001
Median value for units without a mortgage $2,000,001

Risk

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FEMA flood zone(s) X (See more on map)
Fire hazard zone See more on map
Faults and tsunami inundation zone map
Landslides and liquefaction map
Crime incidents map

Transportation

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Neighbors for 1801 Union Street, San Francisco

Here are the neighbors for 1801 Union Street, San Francisco.

Address Square feet Purchase date Purchase price
2739 Octavia St, San Francisco 3,776 05/22/2014
1970 Green St, San Francisco 2,052 12/09/2020 $2,295,000
2831 Laguna St, San Francisco 1,465 12/28/2016
1824 Green St, San Francisco 2,688 08/04/2025 $3,800,000
1830 Green St, San Francisco 4,005 11/03/2023
1840 Green St, San Francisco 6,366 09/06/2024 $3,525,000
1972 Green St, San Francisco 2,052 02/11/1994 $422,500
1944 Green St, San Francisco 2,220 08/04/2011 $1,488,000
1995 Union St, San Francisco 5,761 06/28/2024 $2,600,000
1812 Green St, San Francisco 2,540 07/03/2025 $3,915,000
1950 Green St, San Francisco 6,840 11/20/2014 $4,600,000
1945 Union St, San Francisco 12,580 01/08/2025
1900 Green St, San Francisco 3,005 09/25/2020 $3,800,000
1848 Green St, San Francisco 8,077 04/29/2021 $13,000,000
2829 Laguna St, San Francisco 1,465 11/05/2025 $2,235,000
1969 Union St, San Francisco 7,044 02/08/2021
2745 Octavia St, San Francisco 3,518 02/16/2021
2711 Octavia St, San Francisco 12,348 06/06/2013
1800 Green St, San Francisco 3,640 02/11/2021
1818 Green St, San Francisco 3,225 12/31/2012

Nearby ZIP Codes for 1801 Union Street, San Francisco

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