Kings  »  11231  »  Union St  »  171 Union St

171 Union Street, Brooklyn, NY 11231 - Property report

Also known as: 171 Union St

Property image for 171 Union Street, Brooklyn, NY 11231
static Mapbox map

Property type

Five to Six Families (C2)

Year built

1900

Lot sq. ft.

2,200

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
171 Union Street
ZIP code
11231
Neighborhood
Carroll Gardens
Borough
Brooklyn
Block & lot
00337-0038

Owner

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Building
Property type
Five to Six Families (C2)
Building sq. ft.
2,710
Building dimensions
22 ft x 44 ft
Buildings on lot
1
Stories
3
Year built
1900
Last altered
1989
Building material
Tax
Tax year
2026-2027
Property tax
$12,925
Tax class
Floor area ratio (FAR)
Commercial FAR
Residential FAR
Buildable area
Zoning & Use
Zoning
Qualified opportunity zone
Residential units
5
Residential sq. ft.
Office sq. ft.
Retail sq. ft.
Lot
Lot dimensions
22 ft x 100 ft
Lot sq. ft.
2,200

Area overview

Walk score
97 /100.  Walker's Paradise
Transit score
100 /100.  Rider's Paradise
Bike score
94 /100.  Biker's Paradise
School district
15
Community district
6
Closest police station
0.02 Miles
Closest fire station
0.32 Miles

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

Ownership

Ownership information for 171 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 171 Union Street, Brooklyn, NY 11231

No recently recorded sales for this property.

More about New York City property records.

Title documents

Date Type Amount Party 1 Party 2
08/28/2019 - R
08/22/2019 - D		 Satisfaction of Mortgage
(2019082700439001)		 XXXXX XXXX XXX XXXXXXXX XXXXXXX XXX
07/16/2019 - R
04/29/2019 - D		 Assignment, Mortgage
(2019071500243001)		 XXXXXXXXXX XXXXXXXX XXXXXXXXXXX XXX XXXXXXXX XXXXXXX XXX
05/14/1996 - R Assignment, Mortgage
(3210005184021)		 XXXXXXXX XXXXXXXX XXXXXXXXXXX XXXXXXXXXX XXXXXXXXXXXXXXXXXXX
05/14/1996 - R Mortgage
(3900005184590)		 XXXXX XXXX XXXXXXXX XXXXXXXX XXXXXXXXXXX
11/04/1992 - R Deed
(3430001725943)		 XXXXX XXXX XXXXX XXXX
10/16/1974 - R Deed
(37430074100878)		 XX XXXXXXX XXXXXXXX XXXXX XXXX X
09/05/1969 - R Release of Estate Tax Lien
(36930035901850)		 XX XXXXXXX XXXXXXXX XXXXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 171 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
$12,925
Municipal exemptions
Recent tax assessments
Market value
$2,188,000
Assessed value
$984,600

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 $1,823,000 $820,350 $96,216 12.439% $11,968 $11,968 +6.76%
2024/25 $1,519,200 $683,640 $89,684 12.5% $11,211 $11,211 -0.02%
2023/24 $1,266,000 $569,700 $89,684 12.502% $11,212 $11,212 +5.91%
2022/23 $1,055,000 $474,750 $86,301 12.267% $10,587 $10,587 +8.26%
2021/22 $843,600 $379,620 $79,928 12.235% $9,779 $9,779 +7.71%
2020/21 $819,000 $368,550 $74,012 12.267% $9,079 $9,079 +5.51%
2019/20 $682,800 $307,260 $68,988 12.473% $8,605 $8,605 +7.38%
2018/19 $569,000 $256,050 $63,538 12.612% $8,701 $8,013 +2.62%
2017/18 $482,000 $216,900 $61,395 12.719% $8,444 $7,809 +7.49%
2016/17 $453,000 $203,850 $56,353 12.892% $7,926 $7,265 +8.84%
Permits

Permit information for 171 Union Street, Brooklyn, NY

Filing date Job type Job status Job description Initial cost
01/05/2022 Alteration
01/05/2022 Alteration

*Most recent permits on record for this property.

More about New York City property records

Violations

DOB Violations

No recently recorded violations 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
6

Subway & traffic

Closest station
Smith St & President St at NW Corner
Station lines
F-G
Distance (miles)
0.396
View subway map

Access the detailed traffic volume map for 171 Union Street, Brooklyn, NY 11231 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 171 Union Street, Brooklyn, NY

169 Union St, Brooklyn 167 Union St, Brooklyn 529 Henry St, Brooklyn 525 Henry St, Brooklyn 175 Union St, Brooklyn 504 Henry St, Brooklyn 516 Henry St, Brooklyn 518 Henry St, Brooklyn 531 Henry St, Brooklyn 527 Henry St, Brooklyn 517 Henry St, Brooklyn 521 Henry St, Brooklyn 519 Henry St, Brooklyn 195 Union St, Brooklyn 514 Henry St, Brooklyn 506 Henry St, Brooklyn 173 Union St, Brooklyn 523 Henry St, Brooklyn 512 Henry St, Brooklyn 508 Henry St, Brooklyn

Nearby ZIP codes for 171 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 10280, New York City, NY 10282, New York City, NY 11201, New York City, NY 11205, New York City, NY 11215, New York City, NY 11217, New York City, NY 11218, New York City, NY 11219, New York City, NY 11220, New York City, NY 11232, New York City, NY 11238, New York City, NY

Frequently asked questions

What is the year built for 171 Union Street, Brooklyn, NY 11231?

The development at 171 Union Street, Brooklyn, NY 11231 was built in 1900.

What is the total square footage of 171 Union Street, Brooklyn, NY 11231?

171 Union Street, Brooklyn, NY 11231 has a total of 2,710 square feet.

What is the assessed value of 171 Union Street, Brooklyn, NY 11231?

171 Union Street, Brooklyn, NY 11231 is currently assessed at $984,600.

What are the property taxes for 171 Union Street, Brooklyn, NY 11231?

The property taxes for 171 Union Street, Brooklyn, NY 11231 total $12,924.

How many residential units does this building have?

This building has 5 residential unit(s).

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