San Francisco County » 94131 » Duncan St » 646 Duncan St

646 Duncan Street, San Francisco, CA 94131 - Property report

Also known as: 646 Duncan St

Property image for 646 Duncan Street, San Francisco, CA 94131

Property type

Single Family Residence (31)

Year built

1941

Lot sq. ft.

1,960

Sale price

$2,400,000

General Information

Address

Primary address

646 Duncan St
San Francisco, CA 94131

Zip code

94131

Neighborhood

Noe Valley

County

San Francisco

Municipality

City of San Francisco

Parcel ID

6589-002

Sales

Sale date

09/30/2026

Sale price

$2,400,000

Arm's length

Tax

Tax year

2026-2027

Property tax

$1,204

Tax per sq. ft.

Building

Property type

Single Family Residence

Building sq. ft.

1,078

Stories

Year built

1941

Rooms

Bedrooms

Bathrooms

Lot

Acreage

0.045

Zoning & use

Zoning

Residential- House, One Family (RH-1)

Units

Area overview

Walk score

90 /100. Very Walkable

Transit score

70 /100. Excellent Transit

Bike score

58 /100. Bikeable

School district

San Francisco Unified School District

Ownership

Ownership information for 646 Duncan Street, San Francisco, CA

Property owner name

Registered owner

Source

Deed

Owner contact information

Phone number

Owner address

Documents

Sales history for 646 Duncan Street, San Francisco, CA 94131

Sale date	Sale price	Buyer name	Seller name
09/30/2026	$2,400,000	XXXX XXX	XX XXXXXXX XXXXXXX XXX
04/03/2025	$1,510,000	XXXXXXXX XXXXX	XXXXXXX XXXXX; XXXXXX XXXXXXX X; XXXXXX XXXXXX XXXXXX XXXXX; XXXXXX XXXXXXX X
01/24/2022	$4,425,000	XXXXXXXXXX XXX; XXXXXXXXX XXXX; XXXXXXXX XXXXXX XXXXX	XXXXXXX XXXXXXX XXXXXX; XXXXXXX XXXXXX XXXXX; XXXXXXX XXXXX XXXXX

*Most recent sales on record for this property.

More about San Francisco County property records.

Title documents

Date	Type	Party 1	Party 2
09/30/2026	Fixture Filing	XXXX XXX	XXXXXX XXXXXX XXXXXXX XXXX XXX XXX
09/30/2026	NTC Security Agrmnt	XXXX XXX	XXXXXX XXXXXX XXXXXXX XXXX XXX XXX
09/30/2026	Asgt Rents/Leases	XXXX XXX	XXXXXX XXXXXX XXXXXXX XXXX XXX XXX
09/30/2026	Deed of Trust	XXXX XXX	XXXXXX XXXXXX XXXXXXX XXXX XXX XXX
09/30/2026	Interspousal Transfer Deed	XXXXXX XXXXX	XXXX XXX
09/30/2026	Grant Deed	XX XXXXXXX XXXXXXX XXX	XXXX XXX
09/30/2026	Reconveyance	XXXXX XXXX	XX XXXXXXXX XXXXXXX XXX
09/29/2025	Assgn Deed of Trust	XXXXXXXX XXXXXXX XXX	XXXX XXXXXXXX XX XX XXXXXXXX XXXXXXXXX XX
08/26/2025	Reconveyance	XXXXXXX XXXX XXX	XXXXXXXX XXXXX
08/26/2025	Substitution Trustee	XXXXXXX XXXX XXX	XXXXXXXX XXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 646 Duncan Street, San Francisco, CA

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax

Tax year

2026-2027

Property tax

$1,204

Tax per sq. ft.

Recent tax assessments

Market value

$101,836

Land value

$23,739

Building value

$78,097

More about San Francisco County Property Taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year	Assessed value	Tax rate	Property tax	Y-o-Y change
2025-2026	$99,840	1.1827	$1,181	+3.03%
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%
2019-2020	$89,481	1.1801	$1,056	+3.46%
2018-2019	$87,764	1.163	$1,021	+26.93%
2017-2018	$68,594	1.1723	$804	+1.11%
2016-2017	$67,252	1.1826	$795	+1.52%

Permits

Permit information for 646 Duncan Street, San Francisco, CA

Issued date	Permit number	Permit type	Sub type	Valuation	Finaled date	Status
08/22/2019
08/02/2019
11/16/2015
11/16/2015
11/11/2015

*Most recent permits on record for this property.

Neighborhood

San Francisco residential market stats

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.

Median sale price

$1,500,000

15.4% Y-o-Y

Median price/sq. ft.

$1,155

11.2% Y-o-Y

San Francisco county median sale price

$1,500,000

15.4% Y-o-Y

Check out recently sold homes in San Francisco and see how their prices compare.

Risk

Create a free account to unlock expanded risk information, such as crime incidents in the area, tsunami and landslides risks, or its location relative to FEMA flood zones and the Coastal Barriers Resources System Area (COBRA).

FEMA flood zones

FEMA flood zones

Landslides and liquefaction map

Fire hazard zones

Faults and tsunami inundation zones map

Crime incidents map

Transportation

Daily traffic map

View daily traffic map

Access the detailed traffic volume map for 646 Duncan Street, San Francisco, CA 94131 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Schools

Nearest elementary schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
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
Fairmount Elementary School	3	Public	K-5	337	0.65
St. James School	NR	Private	K-8	135	0.71
Katherine Michiels School	NR	Private	PK-5	50	0.73
Rooftop Elementary School	6	Public	K-8	536	0.75
Mahler (Theresa S.) Children Center	NR	Public	K	1	0.75

Nearest middle schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
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
St. John the Evangelist School	NR	Private	K-8	250	0.76
St John S Elementary School	NR	Private	K-8	231	0.76
Edison Charter Academy	4	Charter	K-8	590	0.79
Buena Vista/ Horace Mann K-8	4	Public	K-8	598	0.96
S.F. County Court Woodside Learning Center	1	Public	6-12	8	0.98

Nearest high schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
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
Sand Paths Academy	NR	Private	8-12	30	1.12
Mission High School	4	Public	9-12	1,041	1.18
Wen Jian Ying School	NR	Private	8-12	9	1.41
S.F. County Opportunity (Hilltop) School	4	Public	6-12	85	1.41
O'connell (John) High School	3	Public	9-12	506	1.48

Nearby ZIP codes for 646 Duncan Street, San Francisco, CA

Frequently asked questions

What is the year built for 646 Duncan Street, San Francisco, CA 94131?

The development at 646 Duncan Street, San Francisco, CA 94131 was built in 1941.

What is the total square footage of 646 Duncan Street, San Francisco, CA 94131?

646 Duncan Street, San Francisco, CA 94131 has a total of 1,078 square feet.

When was 646 Duncan Street, San Francisco, CA 94131 last sold and what was the sale price?

646 Duncan Street, San Francisco, CA 94131 was last sold on 09/30/2026 for $2,400,000.

What is the assessed value of 646 Duncan Street, San Francisco, CA 94131?

646 Duncan Street, San Francisco, CA 94131 is currently assessed at $101,836.

What are the property taxes for 646 Duncan Street, San Francisco, CA 94131?

The property taxes for 646 Duncan Street, San Francisco, CA 94131 total $1,204.

Disclaimer

All data comes from government sources. No attempt has been made to validate it. No attempt has been made to validate the accuracy of the programming of this website.

Do not rely on this report to support investment decisions. The only authoritative source for the information in this report is the government agencies from which the data was acquired.