Kings  »  11217  »  Union St  »  857 Union St

857 Union Street, Brooklyn, NY 11217 - Property report

Also known as: 89 7th Ave

Property image for 857 Union Street, Brooklyn, NY 11217
static Mapbox map

Property type

Walk-up Apartment - Over Six Families with Stores (C7)

Year built

1920

Lot sq. ft.

2,596

Sale price

$8,366,250

General information

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Access up-to-date information from property owner names to sales history, deeds, tax info, mortgages, development data, planimetric maps and more.

Address
Primary address
857 Union Street
Alternate address(es)
857-861 Union St
89 7th Ave
ZIP code
11217
Neighborhood
Park Slope
Borough
Brooklyn
Block & lot
01063-0001

Owner

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Building
Property type
Walk-up Apartment - Over Six Families with Stores (C7)
Building sq. ft.
10,240
Building dimensions
27.5 ft x 90 ft
Buildings on lot
1
Stories
4
Year built
1920
Building material
Sales
Sale date
12/04/2014
Sale price
$8,366,250
Tax
Tax year
2026-2027
Property tax
$204,624
Tax class
Floor area ratio (FAR)
Commercial FAR
Residential FAR
Buildable area
Zoning & Use
Zoning
Qualified opportunity zone
Residential units
12
Residential sq. ft.
Office sq. ft.
Retail sq. ft.
Lot
Lot dimensions
27.5 ft x 94.42 ft
Lot sq. ft.
2,596

Area overview

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

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

Ownership

Ownership information for 857 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 857 Union Street, Brooklyn, NY 11217

Sale date Sale price Buyer name Seller name
12/04/2014 $8,366,250 XXX XXXXX XXXXXXXXXX XXX XXX XXX XXXXX XXX XX&X XXX XXXXXX, XXX

*Most recent sale on record for this property.

More about New York City property records.

Title documents

Date Type Amount Party 1 Party 2
02/21/2024 - R
02/15/2024 - D		 Agreement
(2024022100422001)		 XXX XXXXX XXXXXXXXXX XXX XXXXXXXXXXXX XXXXXXXXXX XXXX
02/13/2019 - R Initial UCC1
(2019020801107008)		 XXX XXXXX XXXXXXXXXX XXX XXXXXXXXXXXX XXXXXXXXXX XXXX
02/13/2019 - R UCC3 Termination
(2019020801107002)		 XXX XXXXX XXX XXXX XXXXXXXXX XXXX
02/13/2019 - R
02/07/2019 - D		 Agreement
(2019020801107006)		 XXX XXXXX XXXXXXXXXX XXX XXXXXXXXXXXX XXXXXXXXXX XXXX
02/13/2019 - R
02/07/2019 - D		 Mortgage
(2019020801107005)		 XXX XXXXX XXXXXXXXXX XXX XXXXXXXXXXXX XXXXXXXXXX XXXX
02/13/2019 - R
02/07/2019 - D		 Assignment, Mortgage
(2019020801107004)		 XXXX XXXXXXXXX XXXX XXXXXXXXXXXX XXXXXXXXXX XXXX
02/13/2019 - R
02/07/2019 - D		 Sundry Agreement
(2019020801107003)		 XXX XXXXX XXXXXXXXXX XXX
02/13/2019 - R
02/07/2019 - D		 Termination of Assign of L&R
(2019020801107001)		 XXXX XXXXXXXXX XXXX XXX XXXXX XXXXXXXXXX XXX
02/13/2019 - R
02/07/2018 - D		 Assignment of Leases and Rents
(2019020801107007)		 XXX XXXXX XXXXXXXXXX XXX XXXXXXXXXXXX XXXXXXXXXX XXXX
01/14/2015 - R Initial UCC1
(2014120901354005)		 XXX XXXXX XXXXXXXXXX XXX XXX XXXX XXXXXXX XXXX XX XXXXXXXXXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 857 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
$204,624
Municipal exemptions
Recent tax assessments
Market value
$4,471,000
Assessed value
$2,011,950

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 $3,741,000 $1,683,450 $1,482,930 12.439% $184,462 $184,462 +5.86%
2024/25 $3,263,000 $1,468,350 $1,394,010 12.5% $174,251 $174,251 +5.08%
2023/24 $3,477,000 $1,564,650 $1,326,420 12.502% $165,829 $165,829 +17.04%
2022/23 $3,326,000 $1,496,700 $1,154,970 12.267% $141,680 $141,680 +21.47%
2021/22 $2,670,000 $1,201,500 $953,280 12.235% $116,634 $116,634 +19.16%
2020/21 $2,753,000 $1,238,850 $797,940 12.267% $97,883 $97,883 +26.65%
2019/20 $2,512,000 $1,130,400 $619,650 12.473% $77,289 $77,289 +32.37%
2018/19 $1,572,000 $707,400 $462,960 12.612% $58,389 $58,389 +18.65%
2017/18 $1,085,000 $488,250 $386,910 12.719% $49,211 $49,211 +9.51%
2016/17 $944,000 $424,800 $348,570 12.892% $44,938 $44,938 +9.51%
Permits

Permit information for 857 Union Street, Brooklyn, NY

Filing date Job type Job status Job description Initial cost
06/29/2026 Alteration
06/03/2026 Alteration
04/10/2026 Alteration
04/16/2022 Alteration
04/16/2022 Alteration

*Most recent permits on record for this property.

More about New York City property records

Violations

DOB Violations

Violation ID Issue date Type Status
03/01/2013 Lblvio-low pressure boiler
12/13/2011 Lblvio-low pressure boiler
01/03/2008 Ll6291-local law 62/91 - boilers

*Most recent DOB violations on record for this property.

Neighborhood

Brooklyn commercial market stats

Review a detailed real estate market overview of Brooklyn and assess current trends, property values, property types sold and transaction volumes. View the median price per square foot in Brooklyn and compare it to other New York City boroughs.

Q2 2026 median price/sq. ft.

$533

1.5% Y-o-Y

Q1 2026 median price/sq. ft.

$471

-8.9% Y-o-Y

2025 median price/sq. ft.

$523

5.2% 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
-

Subway & traffic

Closest station
Flatbush Ave & Plaza Street West at NW Corner
Station lines
2-3
Distance (miles)
0.208
View subway map

Access the detailed traffic volume map for 857 Union Street, Brooklyn, NY 11217 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

Neighbors for 857 Union Street, Brooklyn, NY

77 7th Ave, Brooklyn 240 Berkeley Pl, Brooklyn 29 8th Ave, Brooklyn 54 8th Ave, Brooklyn 186 Berkeley Pl, Brooklyn 27 8th Ave, Brooklyn 45 8th Ave, Brooklyn 49 8th Ave, Brooklyn 85 7th Ave, Brooklyn 83 7th Ave, Brooklyn 81 7th Ave, Brooklyn 184 Berkeley Pl, Brooklyn 56 8th Ave, Brooklyn 25 Plaza St W, Brooklyn 31 8th Ave, Brooklyn 33 8th Ave, Brooklyn 37 8th Ave, Brooklyn 43 8th Ave, Brooklyn 39 8th Ave, Brooklyn 60 8th Ave, Brooklyn

Nearby ZIP codes for 857 Union Street, Brooklyn, NY

10002, New York City, NY 10004, New York City, NY 10005, New York City, NY 10006, New York City, NY 10007, New York City, NY 10038, New York City, NY 10271, New York City, NY 10278, New York City, NY 10279, New York City, NY 11201, New York City, NY 11205, New York City, NY 11206, New York City, NY 11215, New York City, NY 11216, New York City, NY 11218, New York City, NY 11225, New York City, NY 11226, 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 857 Union Street, Brooklyn, NY 11217?

The development at 857 Union Street, Brooklyn, NY 11217 was built in 1920.

What is the market value of 857 Union Street, Brooklyn, NY 11217?

The current market value of 857 Union Street, Brooklyn, NY 11217 is $4,471,000.

What is the total square footage of 857 Union Street, Brooklyn, NY 11217?

857 Union Street, Brooklyn, NY 11217 has a total of 10,240 square feet.

What is the price per square foot for this property?

$817 per square foot is the price for 857 Union Street, Brooklyn, NY 11217.

How many commercial spaces does this building have?

The number of commercial spaces in this building is 2.

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