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1820 Union Street, San Francisco, CA 94123 Property Information

1820 Union Street, San Francisco, CA 94123 Property Information

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  • Owner
  • Documents
  • Tax
  • Neighborhood
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1820 Union Street, San Francisco, CA 94123
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Address

Primary address 1820 Union Street, San Francisco
Zip code 94123
County San Francisco
Neighborhood Cow Hollow
Parcel ID 0530-010

Sales & Tax Overview for 1820 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 12/16/1998
Sale price $1,825,000
Arm's length
Property tax $33,838

Lot & Building Information for 1820 Union Street, San Francisco

Building sqft 7,558
Building class Apartments 5 to 14 Units (A5)
Acreage 0.107
Rooms 23
Units 6
Year built 1906
Stories 3
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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 1820 Union Street, San Francisco

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About 1820 Union Street, San Francisco

What is the year built & the total sq. ft. for 1820 Union Street, San Francisco, CA 94123?

1820 Union Street, San Francisco, CA 94123 was built in 1906 and has a total of 7,558 square feet.

What is the assessed value of 1820 Union Street, San Francisco, CA 94123 and the property tax paid?

Assessed at $2,861,085, the tax amount paid for 1820 Union Street, San Francisco, CA 94123 is $33,838.

When was 1820 Union Street, San Francisco, CA 94123 last sold?

1820 Union Street, San Francisco, CA 94123 was last sold in 08/16/2004.

How many residential units does this building have?

This building has 6 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 1820 Union Street, San Francisco

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Sale date Sale price Buyer name Seller name
12/16/1998 $1,825,000

Title Documents for 1820 Union Street, San Francisco

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Date Type Amount Party 1 Party 2 Maturity Document Doc image
04/19/2022 Reconveyance
04/19/2022 Substitution Trustee
12/09/2011 Agreement
07/05/2011 Reconveyance
07/05/2011 Substitution Trustee
04/26/2011 Financing Statement
04/26/2011 Assignment of Rents
04/26/2011 Notice Security Agreement
04/26/2011 Deed of Trust
11/26/2007 Lease Agreement
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R: Recorded date
D: Document date

Property Taxes for 1820 Union Street, San Francisco

Access detailed property tax data for 1820 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 $33,838
Market value $2,861,085

Assessment History for 1820 Union Street, San Francisco

Here's the assessment & property tax history for 1820 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 $2,861,085 1.1827 $33,838 +2.98%
2024-2025 $2,804,986 1.1714 $32,858 +1.45%
2023-2024 $2,749,988 1.1777 $32,387 +1.83%
2022-2023 $2,696,068 1.1797 $31,806 +1.76%
2021-2022 $2,643,205 1.18248 $31,255 -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 1820 Union Street, San Francisco

Here are the neighbors for 1820 Union Street, San Francisco.

Address Square feet Purchase date Purchase price
2843 Octavia St, San Francisco 2,744 06/30/2016 $3,405,000
2871 Octavia St, San Francisco 8,280 06/05/2019
1878 Union St, San Francisco 2,090 03/05/2019
2863 Octavia St, San Francisco 5,427 12/19/2024
1872 Union St, San Francisco 3,700 12/22/2010
2926 Laguna St, San Francisco 1,764 06/29/2006
1814 Union St, San Francisco 4,060 03/30/1994 $889,000
2821 Octavia St, San Francisco 3,638 06/06/1997
2853 Octavia St, San Francisco 5,094 10/22/2013
2912 Laguna St, San Francisco 6,540 03/21/2022
1892 Union St, San Francisco 6,580 11/02/2009
2942 Laguna St, San Francisco 3,120 12/06/2023
1830 Union St, San Francisco 3,000 11/04/2024
1862 Union St, San Francisco 3,535 08/02/2017 $2,800,000
1884 Union St, San Francisco 2,880 12/30/2021 $1,900,000
2827 Octavia St, San Francisco 3,302 11/25/2013
2835 Octavia St, San Francisco 2,846 07/17/2025 $2,000,000
1856 Union St, San Francisco 1,650 08/08/2019
1806 Union St, San Francisco 7,059 05/29/2013
2826 Octavia St, San Francisco 1,596 06/26/2025 $2,850,000

Nearby ZIP Codes for 1820 Union Street, San Francisco

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