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646 Duncan Street, San Francisco, CA 94131 Property Information

646 Duncan Street, San Francisco, CA 94131 Property Information

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  • Owner
  • Documents
  • Tax
  • Neighborhood
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646 Duncan Street, San Francisco, CA 94131
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Address

Primary address 646 Duncan Street, San Francisco
Zip code 94131
County San Francisco
Neighborhood Noe Valley
Parcel ID 6589-002

Sales & Tax Overview for 646 Duncan 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 04/03/2025
Sale price $1,510,000
Arm's length
Property tax $1,181

Lot & Building Information for 646 Duncan Street, San Francisco

Building sqft 1,078
Building class Dwelling (D)
Acreage 0.045
Units 1
Year built 1941
Stories 1
Bedrooms 2
Bathrooms 2
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Zoning, Use & Area Overview

Walk Score
Transit Score
Bike Score


Zoning district Residential- House, One Family (RH-1)
School district San Francisco Unified School District

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Other Property Data for 646 Duncan Street, San Francisco

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About 646 Duncan Street, San Francisco

What is the year built & the total sq. ft. for 646 Duncan Street, San Francisco, CA 94131?

646 Duncan Street, San Francisco, CA 94131 was built in 1941 and has a total of 1,078 square feet.

What is the assessed value of 646 Duncan Street, San Francisco, CA 94131 and the property tax paid?

Assessed at $99,840, the tax amount paid for 646 Duncan Street, San Francisco, CA 94131 is $1,180.

When was 646 Duncan Street, San Francisco, CA 94131 last sold?

646 Duncan Street, San Francisco, CA 94131 was last sold in 07/22/2025.

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 646 Duncan Street, San Francisco

Create a free account to view the complete sales history for 646 Duncan Street, San Francisco, including title documents, transfer conditions, mortgages and liens.

Sale date Sale price Buyer name Seller name
04/03/2025 $1,510,000
01/24/2022 $4,425,000
06/11/2019 $2,400,000
       
       
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*Here are the three most recent sales for this property.


Title Documents for 646 Duncan Street, San Francisco

To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.

Date Type Amount Party 1 Party 2 Maturity Document Doc image
08/26/2025 Reconveyance
08/26/2025 Substitution Trustee
08/12/2025 Asgt Rents/Leases
08/12/2025 Deed of Trust
07/22/2025 NTC Security Agrmnt 02/01/2027
07/22/2025 Fixture Filing 02/01/2027
07/22/2025 Asgt Rents/Leases 02/01/2027
07/22/2025 Deed of Trust 02/01/2027
07/22/2025 Grant Deed
07/09/2025 Grant Deed
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R: Recorded date
D: Document date

Property Taxes for 646 Duncan Street, San Francisco

Access detailed property tax data for 646 Duncan Street, San Francisco, CA 94131. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year: 2025-2026
Property tax $1,181
Market value $99,840

Assessment History for 646 Duncan Street, San Francisco

Here's the assessment & property tax history for 646 Duncan 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
2024-2025 $97,840 1.1714 $1,146 +1.45%
2023-2024 $95,926 1.1777 $1,130 +1.82%
2022-2023 $94,049 1.1797 $1,109 +1.79%
2021-2022 $92,207 1.18248 $1,090 -0.34%
2020-2021 $91,266 1.1984 $1,094 +3.58%

San Francisco residential market stats

Median Sale Price
$1,325,000
1.8% YoY
Median Price/Sqft
$1,026
-0.1% YoY
San Francisco County Median Sale Price
$1,325,000
1.8% 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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Risk

Create a free account to unlock extended information for 646 Duncan Street, San Francisco, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).

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

Access the detailed traffic volume map for 646 Duncan Street, San Francisco to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

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Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance to school (mi)
Mission Education Center 2 Public K-5 141 0.31
St. Philip School NR Private K-8 223 0.42
St. Paul's School NR Private K-8 207 0.44
Alvarado Elementary School 7 Public K-5 488 0.55
Eureka Learning Center NR Private K 11 0.65

Nearest middle schools

Name Rating Type Grade range No of students Distance to school (mi)
Lick (James) Middle School 3 Public 6-8 485 0.30
St. Philip School NR Private K-8 223 0.42
St. Paul's School NR Private K-8 207 0.44
St. James School NR Private K-8 135 0.71
Rooftop Elementary School 6 Public K-8 536 0.75

Nearest high schools

Name Rating Type Grade range No of students Distance to school (mi)
Asawa (Ruth) San Francisco School Of The Arts, A Public School. 10 Public 9-12 679 0.76
Academy (The)- SF @Mcateer 6 Public 9-12 320 0.76
Ica Cristo Rey NR Private 9-12 364 0.92
S.F. County Court Woodside Learning Center 1 Public 6-12 8 0.98
Oaks Christian Academy NR Private 3-12 0 0.99

Data provided by GreatSchools.org © 2025. All rights reserved.

Neighbors for 646 Duncan Street, San Francisco

Here are the neighbors for 646 Duncan Street, San Francisco.

Address Square feet Purchase date Purchase price
687 27th St, San Francisco 1,884 10/28/2022
47 Newburg St, San Francisco 1,790 02/15/2023
53 Newburg St, San Francisco 1,917 08/30/2010 $875,000
1415 Diamond St, San Francisco 2,576 04/03/2014
65 Newburg St, San Francisco 2,653 03/31/2025
1427 Diamond St, San Francisco 1,210 06/27/2012
1439 Diamond St, San Francisco 1,375 08/24/1999
652 Duncan St, San Francisco 2,550 04/22/2021 $3,400,000
29 Newburg St, San Francisco 1,248 10/01/2021 $1,725,000
59 Newburg St, San Francisco 1,000 06/21/2024 $1,650,000
1411 Diamond St, San Francisco 1,942 05/30/2025 $2,900,000
17 Newburg St, San Francisco 1,181 07/06/2022
35 Newburg St, San Francisco 1,954 05/20/2022
1433 Diamond St, San Francisco 3,421 09/13/2019 $4,500,000
23 Newburg St, San Francisco 800 02/11/2000
1445 Diamond St, San Francisco 1,350 01/27/2021
1421 Diamond St, San Francisco 3,086 06/23/2015
1401 Diamond St, San Francisco 1,740 09/19/2023 $1,500,000
1 Newburg St, San Francisco 2,590 06/12/2024 $3,500,000
41 Newburg St, San Francisco 1,425 12/13/2012 $1,100,000

Nearby ZIP Codes for 646 Duncan Street, San Francisco

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