New York City  »  11231  »  Union St  »  434 Union St

434 Union Street #B, Brooklyn, NY 11231 - Property report

Also known as: 434 Union St #B

Property image for 434 Union Street #B, Brooklyn, NY 11231
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Property type

Condo - Residential Unit in 1-3 Story Building (R3)

Year built

1920

Lot sq. ft.

2,033

Sale price

$1,290,000

General information

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Address
Primary address
434 Union Street #B
ZIP code
11231
Neighborhood
Gowanus
Borough
Brooklyn
Block & lot
00437-1002

Owner

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Building
Property type
Condo - Residential Unit in 1-3 Story Building (R3)
Unit sq. ft.
913
Building dimensions
20 ft x 40 ft
Buildings on lot
1
Stories
3
Year built
1920
Sales
Sale date
08/12/2021
Sale price
$1,290,000
Tax
Tax year
2026-2027
Property tax
$9,186
Tax class
Floor area ratio (FAR)
Commercial FAR
Residential FAR
Buildable area
Zoning & Use
Zoning
Qualified opportunity zone
Residential units
3
Residential sq. ft.
Commercial units
0
Office sq. ft.
Retail sq. ft.
Lot
Distance to wide street
Lot dimensions
20.33 ft x 100 ft
Lot sq. ft.
2,033

Area overview

Walk score
97 /100.  Walker's Paradise
Transit score
100 /100.  Rider's Paradise
Bike score
95 /100.  Biker's Paradise
School district
15
Community district
6

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

Ownership

Ownership information for 434 Union Street #B, Brooklyn, NY

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

Sales history for 434 Union Street #B, Brooklyn, NY 11231

Sale date Sale price Buyer name Seller name
08/12/2021 $1,290,000 XXXX, XXXX XXXXX XXXXXX XXXXXXX XXX, 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
11/23/2021 - R
10/27/2021 - D		 Partial Release of Mortgage
(2021111600350001)		 XXXXXX XXXXXXX XXXXXXXX XXXXXXXXXX XXX
08/23/2021 - R
08/12/2021 - D		 Power of Attorney
(2021081900416003)		 XXXX XXXX XXXXX XXXXXX XXXXXXX XXX XXX
08/23/2021 - R
08/12/2021 - D		 Mortgage
(2021081900416002)		 XXXX XXXX XXXXXXXX XXXX X X
08/23/2021 - R
08/12/2021 - D		 Deed
(2021081900416001)		 XXXXX XXXXXX XXXXXXX XXX XXX XXXX XXXX
07/02/2021 - R
06/25/2021 - D		 Maps
(2021062801426002)		 XXX XXX XXXXX XXXXXX XXXXXXXXXXX
07/02/2021 - R
03/29/2021 - D		 Condo Declaration
(2021062801426001)		 XXXXX XXXXXX XXXXXXX XXX XXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 434 Union Street #B, 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
$9,186
Municipal exemptions
Recent tax assessments
Market value
$1,897,680
Assessed value
$113,861

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 $2,178,720 $130,723 $45,945 19.843% $9,117 $9,117 +4.72%
2024/25 $2,563,200 $153,792 $43,344 20.085% $8,706 $8,706 +6.00%
2023/24 $3,145,200 $188,712 $40,891 20.085% $8,213 $8,213 +4.83%
2022/23 $2,899,800 $173,988 $38,576 20.309% $7,834 $7,834 n/a
Permits

Permit information for 434 Union Street #B, 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

Carroll Gardens, Columbia, RedHook residential market stats

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

Median sale price

—

Median price/sq. ft.

—

Brooklyn median sale price

$899,000

6% Y-o-Y

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

Risk

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FEMA flood zones

Property location map
FEMA flood zones
-

Hurricane evacuation zones

Property location map
Hurricane evacuation zones
-

Subway & traffic

Closest station
Smith St & President St at NE Corner
Station lines
F-G
Distance (miles)
0.217
View subway map

Access the detailed traffic volume map for 434 Union Street #B, 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

Schools

Nearest elementary schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
P.S. 32 Samuels Mills Sprole 6 No Public PK, K-5 452 0.06
P.S. 32 Samuels Mills Sprole 6 No Public PK, K-5 452 0.06
Hannah Senesh Community Day School NR No Private K-8 231 0.28
P.S. 58 The Carroll 8 No Public PK, K-5 751 0.28
P.S. 58 The Carroll 8 No Public PK, K-5 751 0.28
Rivendell School NR No Private PK-K 103 0.30
Rivendell School NR No Private PK-K 103 0.30
P.S. 372 The Children S School NR No Public PK, K-8 436 0.34
P.S. 372 The Children S School NR No Public PK, K-8 436 0.34
Success Academy Cobble Hill 9 No Charter K-4 401 0.39
Nearest middle schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
Hannah Senesh Community Day School NR No Private K-8 231 0.28
P.S. 372 The Children S School NR No Public PK, K-8 436 0.34
School For International Studies 5 No Public 6-12 782 0.39
Al-Madinah School NR No Private PK-12 790 0.40
International School of Brooklyn NR No Private PK, K-8 0 0.48
International School of Brooklyn NR No Private PK-8 369 0.48
Mary McDowell Friends School NR No Private 6-10 290 0.52
The Math And Science Exploratory School 7 No Public 6-8 522 0.59
Ms 51 William Alexander 7 No Public 6-8 1,026 0.61
P.S. 369 Coy L Cox School NR No Public K-12 487 0.62
Nearest high schools

Name Rating Att. zoned Type Grade range No of students Distance (miles)
New Dawn Charter High School 2 No Charter 9-12 233 0.21
Cobble Hill School of American Studies 1 No Public 9-12 316 0.34
Digital Arts and Cinema Technology High School 8 No Public 9-12 331 0.39
School For International Studies 5 No Public 6-12 782 0.39
Al-Madinah School NR No Private PK-12 790 0.40
Mary McDowell Friends School NR No Private 6-10 290 0.52
Brooklyn High School of the Arts 5 No Public 9-12 927 0.59
P.S. 369 Coy L Cox School NR No Public K-12 487 0.62
Brooklyn Secondary School For Collaborative Studie 6 No Public 6-12 671 0.62
Khalil Gibran International Academy 2 No Public 9-12 134 0.69

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

Neighbors for 434 Union Street #B, Brooklyn, NY

822 Flatbush Ave, Brooklyn

Nearby ZIP codes for 434 Union Street #B, 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 434 Union Street #B, Brooklyn, NY 11231?

The development at 434 Union Street #B, Brooklyn, NY 11231 was built in 1920.

What is the total square footage of 434 Union Street #B, Brooklyn, NY 11231?

434 Union Street #B, Brooklyn, NY 11231 has a total of 913 square feet.

When was 434 Union Street #B, Brooklyn, NY 11231 last sold and what was the sale price?

434 Union Street #B, Brooklyn, NY 11231 was last sold on 08/12/2021 for $1,290,000.

What is the assessed value of 434 Union Street #B, Brooklyn, NY 11231?

434 Union Street #B, Brooklyn, NY 11231 is currently assessed at $113,861.

What are the property taxes for 434 Union Street #B, Brooklyn, NY 11231?

The property taxes for 434 Union Street #B, Brooklyn, NY 11231 total $9,185.

How many residential units does this building have?

This building has 1 residential unit(s).

Disclaimer

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