New York City  »  11231  »  Union St  »  334 Union St

334 Union Street, Brooklyn, NY 11231 - Property report

Also known as: 334 Union St

Property image for 334 Union Street, Brooklyn, NY 11231

Property type

Three Families (C0)

Year built

1920

Lot sq. ft.

2,000

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
334 Union Street
ZIP code
11231
Neighborhood
Carroll Gardens
Borough
Brooklyn
Block & lot
00435-0030

Owner

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Building
Property type
Three Families (C0)
Building sq. ft.
4,000
Building dimensions
20 ft x 50 ft
Buildings on lot
1
Stories
3
Year built
1920
Building material
Stone
Exterior wall
None
Basement
N
Tax
Tax year
2026-2027
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 ft x 100 ft
Lot sq. ft.
2,000
Ownership

Ownership information for 334 Union Street, Brooklyn, NY

Unlock full ownership info — get contact details, including phone numbers and emails for owners and the real people behind LLCs.

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

Sales history for 334 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
10/20/2025 - R
10/16/2025 - D		 Satisfaction of Mortgage
(2025101700134001)		 XXXX XXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XXX
09/25/2025 - R
09/19/2025 - D		 Satisfaction of Mortgage
(2025092400106001)		 XXXX XXXXXXX X XXXXXXXXXXXX XXX
09/25/2025 - R
09/16/2025 - D		 Assignment, Mortgage
(2025092400093001)		 XXXXXX XXXXXXXX XXXXXXXXXXX XXXXXXXXXXXX XXX
08/25/2025 - R
08/20/2025 - D		 Maps
(2025082000629002)		 XXX XXXXX XXXXXXXXX
08/25/2025 - R
06/23/2025 - D		 Condo Declaration
(2025082000629001)		 XXX XXXXX XXXXXXXXX
07/12/2024 - R
06/27/2024 - D		 Deed
(2024070900827001)		 XXXX XXXXXXX XXX XXXXX XXXXXX XXX
10/11/2016 - R
09/28/2016 - D		 Agreement
(2016100601441002)		 XXXX XXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XXX
10/11/2016 - R
09/28/2016 - D		 Mortgage
(2016100601441001)		 XXXX XXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XXX
12/06/2012 - R
11/26/2012 - D		 Satisfaction of Mortgage
(2012111500015001)		 XXXX XXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XX X (X
12/07/2012 - R
10/26/2012 - D		 Mortgage
(2012112700038001)		 XXXX XXXXXXX X XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 334 Union Street, Brooklyn, NY

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

This property currently has a zero assessment. No calculation of property tax can therefore be made.

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 $1,408,000 $84,480 $84,480 19.843% $16,763 $14,859 +3.79%
2024/25 $1,346,000 $80,760 $80,760 20.085% $16,221 $14,316 -15.27%
2023/24 $1,402,000 $84,120 $84,120 20.085% $16,896 $16,896 +64.55%
2022/23 $1,168,000 $525,600 $83,702 12.267% $10,268 $10,268 +3.54%
2021/22 $934,200 $420,390 $81,055 12.235% $9,917 $9,917 +7.71%
2020/21 $907,000 $408,150 $75,053 12.267% $9,207 $9,207 +6.20%
2019/20 $756,000 $340,200 $69,501 12.473% $8,669 $8,669 +6.75%
2018/19 $630,000 $283,500 $64,386 12.612% $8,120 $8,120 -0.84%
2017/18 $534,000 $240,300 $64,386 12.719% $8,189 $8,189 +1.88%
2016/17 $501,000 $225,450 $62,350 12.892% $8,038 $8,038 +8.07%
Permits

Permit information for 334 Union Street, Brooklyn, NY

Filing date Job type Job status Job description Initial cost
01/16/2025 Subdivision: condo
03/10/2024 Alteration
12/21/2023 Alteration
07/10/2023 Alteration
07/10/2023 Alteration

*Most recent permits on record for this property.

More about New York City property records

Violations

HPD Violations

Violation ID Inspection date Class NOV issue date Status
11/20/2025 I
06/11/2025 A
03/27/2023 A

*Most recent HPD violations on record 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.

Neighbors for 334 Union Street, Brooklyn, NY

316 Union St, Brooklyn 290 President St, Brooklyn 289 President St, Brooklyn 287 President St, Brooklyn 320 Union St, Brooklyn 330 Union St, Brooklyn 324 Union St, Brooklyn 286 President St, Brooklyn 282 President St, Brooklyn 328 Union St, Brooklyn 281 President St, Brooklyn 322 Union St, Brooklyn 312 Union St, Brooklyn 336 Union St, Brooklyn 288 President St, Brooklyn 326 Union St, Brooklyn 318 Union St, Brooklyn 284 President St, Brooklyn 314 Union St, Brooklyn

Nearby ZIP codes for 334 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 334 Union Street, Brooklyn, NY 11231?

The development at 334 Union Street, Brooklyn, NY 11231 was built in 1920.

What is the total square footage of 334 Union Street, Brooklyn, NY 11231?

334 Union Street, Brooklyn, NY 11231 has a total of 4,000 square feet.

How many residential units does this building have?

This building has 3 residential unit(s).

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