New York City  »  11215  »  Union St  »  644 Union St

644 Union Street, Brooklyn, NY 11215 - Property report

Also known as: 644 Union St

Property image for 644 Union Street, Brooklyn, NY 11215
static Mapbox map

Property type

Miscellaneous One Family (A9)

Year built

1899

Lot sq. ft.

1,520

General information

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Address
Primary address
644 Union Street
ZIP code
11215
Neighborhood
Park Slope
Borough
Brooklyn
Block & lot
00955-0020

Owner

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Building
Property type
Miscellaneous One Family (A9)
Building sq. ft.
1,920
Building dimensions
16 ft x 40 ft
Buildings on lot
1
Stories
3
Year built
1899
Building material
Stone
Exterior wall
Brick/Masonary
Basement
4
Tax
Tax year
2026-2027
Property tax
$4,067
Tax class
Floor area ratio (FAR)
Commercial FAR
Residential FAR
Buildable area
Zoning & Use
Zoning
Qualified opportunity zone
Residential units
1
Residential sq. ft.
Commercial units
0
Office sq. ft.
Retail sq. ft.
Lot
Frontage(s)
Union Street (wide)
Distance to wide street
Lot dimensions
16 ft x 95 ft
Lot sq. ft.
1,520

Area overview

Walk score
99 /100.  Walker's Paradise
Transit score
100 /100.  Rider's Paradise
Bike score
90 /100.  Biker's Paradise
School district
13
Community district
6
Closest police station
0.49 Miles
Closest fire station
0.32 Miles

View more such as transportation, nearby schools and risk designations.

Ownership

Ownership information for 644 Union Street, Brooklyn, NY

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Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 644 Union Street, Brooklyn, NY 11215

No recently recorded sales for this property.

More about New York City property records.

Title documents

Date Type Amount Party 1 Party 2
01/04/2024 - R
12/28/2023 - D		 Satisfaction of Mortgage
(2023122200025001)		 XXXXXXX XXXXXXX XXXXX XXXXX XXXX X X
07/12/2016 - R
06/28/2016 - D		 Satisfaction of Mortgage
(2016062802184001)		 XXXXXXX XXXXXXX XXXXXXXXXXXX XXX
01/07/2014 - R
12/09/2013 - D		 Satisfaction of Mortgage
(2013121201352001)		 XXXXXXX XXXXXXX XXXXX XXXXX XXXX X X
12/17/2013 - R
11/12/2013 - D		 Mortgage
(2013112900322001)		 XXXXXXX XXXXXXX XXXXX XXXXX XXXX X X
04/28/2005 - R
04/13/2005 - D		 Assignment, Mortgage
(2005041401888001)		 XXXXX XXX XXXXX XXXXX XXXX XX
01/23/2004 - R
10/27/2003 - D		 Mortgage
(2003111000319001)		 XXXXXX XXXXXX XXXXX XXX
10/24/2002 - R Mortgage
(3130008930613)		 XXXXXXX XXXXXXX XXXXXXXX XX
07/30/2002 - R Satisfaction of Mortgage
(3920008789892)		 XXXXXX XXXXXX
06/10/2002 - R Mortgage
(3550008707955)		 XXXXXXX XXXXXXX XXXXXXXXXXXX XXX
06/10/2002 - R Agreement
(3230008709323)		 XXXXXX XXXXXXX XXXX XXXXXXXXXXXX XXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 644 Union Street, Brooklyn, NY

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

Current property tax
Tax year
2025-2026
Property tax
$4,067
Municipal exemptions
Recent tax assessments
Market value
$2,929,000
Assessed value
$175,740

More about New York City 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 Market value Assessed value Taxable amount Tax rate Base tax Property tax Y-o-Y change
2025/26 $2,607,000 $156,420 $20,476 19.843% $4,345 $4,063 -0.78%
2024/25 $2,766,000 $165,960 $20,388 20.085% $4,364 $4,095 +6.74%
2023/24 $2,973,000 $178,380 $19,100 20.085% $4,117 $3,836 +5.65%
2022/23 $2,519,000 $151,140 $17,880 20.309% $3,928 $3,631 +8.23%
2021/22 $2,436,000 $146,160 $16,807 19.963% $3,643 $3,355 -5.32%
2020/21 $2,602,000 $156,120 $16,837 21.045% $3,840 $3,543 +0.20%
2019/20 $2,284,000 $137,040 $16,707 21.167% $3,833 $3,536 +8.21%
2018/19 $2,502,000 $150,120 $15,623 20.919% $3,574 $3,268 +9.46%
2017/18 $2,259,000 $135,540 $14,647 20.385% $3,285 $2,986 +9.37%
2016/17 $1,673,000 $100,380 $13,656 19.991% $3,040 $2,730 +2.46%
Permits

Permit information for 644 Union Street, Brooklyn, NY

No recently recorded permits for this property.

More about New York City property records

Violations

HPD Violations

No recently recorded violations for this property.

Neighborhood

Park Slope residential market stats

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

Median sale price

$1,619,646

12.4% Y-o-Y

Median price/sq. ft.

$1,514

6.4% Y-o-Y

Brooklyn median sale price

$899,000

6% Y-o-Y

Check out recently sold homes in Brooklyn 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

Property location map
FEMA flood zones
X

Hurricane evacuation zones

Property location map
Hurricane evacuation zones
5

Subway & traffic

Closest station
4th Ave & Union St at SE Corner
Station lines
R
Distance (miles)
0.05
View subway map

Access the detailed traffic volume map for 644 Union Street, Brooklyn, NY 11215 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity. View daily traffic map

Schools

Nearest elementary schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
P.S. 282 Park Slope 5 Yes Public PK, K-5 496 0.23
P.S. 282 Park Slope 5 Yes Public PK, K-5 496 0.23
P.S. 372 The Children S School NR No Public PK, K-8 436 0.17
P.S. 372 The Children S School NR No Public PK, K-8 436 0.17
Rivendell School NR No Private PK-K 103 0.19
Rivendell School NR No Private PK-K 103 0.19
P.S. 133 William A Butler 6 No Public PK, K-5 609 0.24
P.S. 133 William A Butler 6 No Public PK, K-5 609 0.24
Berkeley Carroll Elementary School NR No Private PK-12 940 0.30
Berkeley Carroll Elementary School NR No Private PK-12 940 0.30
Nearest middle schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
P.S. 372 The Children S School NR No Public PK, K-8 436 0.17
Berkeley Carroll Elementary School NR No Private PK-12 940 0.30
Park Slope Christian Academy NR No Private PK, K-8 37 0.30
St Francis Xavier School NR No Private PK-8 175 0.32
P.S. 77 NR No Public K-12 304 0.33
Ms 266 Park Place Community Middle School 4 No Public 6-8 69 0.33
Ms 51 William Alexander 7 No Public 6-8 1,026 0.34
Al-Madinah School NR No Private PK-12 790 0.37
Berkeley Carroll School NR No Private PK-12 977 0.44
The Math And Science Exploratory School 7 No Public 6-8 522 0.49
Nearest high schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
Berkeley Carroll Elementary School NR No Private PK-12 940 0.30
P.S. 77 NR No Public K-12 304 0.33
Al-Madinah School NR No Private PK-12 790 0.37
Berkeley Carroll School NR No Private PK-12 977 0.44
Brooklyn High School of the Arts 5 No Public 9-12 927 0.49
Cyberarts Studio Academy 2 No Public 9-12 298 0.55
Millennium Brooklyn High School 10 No Public 9-12 721 0.55
Park Slope Collegiate 4 No Public 6-12 577 0.55
John Jay School for Law 3 No Public 9-12 461 0.55
New Dawn Charter High School 2 No Charter 9-12 233 0.61

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 644 Union Street, Brooklyn, NY

646 Union St, Brooklyn 652 Union St, Brooklyn 662 Union St, Brooklyn 642 Union St, Brooklyn 638 Union St, Brooklyn 215 4th Ave, Brooklyn 845 Union St, Brooklyn 650 Union St, Brooklyn 656 Union St, Brooklyn 666 Union St, Brooklyn 805 Union St, Brooklyn 660 Union St, Brooklyn 799 Union St, Brooklyn 648 Union St, Brooklyn 654 Union St, Brooklyn 801 Union St, Brooklyn 640 Union St, Brooklyn 227 4th Ave, Brooklyn 803 Union St, Brooklyn 664 Union St, Brooklyn

Nearby ZIP codes for 644 Union Street, Brooklyn, NY

10004, New York City, NY 10005, New York City, NY 10038, New York City, NY 10271, New York City, NY 11201, New York City, NY 11204, New York City, NY 11205, New York City, NY 11213, New York City, NY 11216, New York City, NY 11217, New York City, NY 11218, New York City, NY 11219, New York City, NY 11220, New York City, NY 11225, New York City, NY 11226, New York City, NY 11228, New York City, NY 11230, New York City, NY 11231, New York City, NY 11232, New York City, NY 11238, New York City, NY

Frequently asked questions

What is the year built for 644 Union Street, Brooklyn, NY 11215?

The development at 644 Union Street, Brooklyn, NY 11215 was built in 1899.

What is the total square footage of 644 Union Street, Brooklyn, NY 11215?

644 Union Street, Brooklyn, NY 11215 has a total of 1,920 square feet.

What is the assessed value of 644 Union Street, Brooklyn, NY 11215?

644 Union Street, Brooklyn, NY 11215 is currently assessed at $175,740.

What are the property taxes for 644 Union Street, Brooklyn, NY 11215?

The property taxes for 644 Union Street, Brooklyn, NY 11215 total $4,067.

How many residential units does this building have?

This building has 1 residential unit(s).

Disclaimer

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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.

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