New York City » 11215 » Union St » 823 Union St

823 Union Street, Brooklyn, NY 11215 - Property report

Also known as: 823 Union St

Property image for 823 Union Street, Brooklyn, NY 11215

Property type

Two Family Brick (B1)

Year built

1901

Lot sq. ft.

1,800

Sale price

$3,000,000

General information

Address

Primary address

823 Union Street

ZIP code

11215

Neighborhood

Park Slope

Borough

Brooklyn

Block & lot

00954-0060

Building

Property type

Two Family Brick (B1)

Building sq. ft.

2,736

Building dimensions

20 ft x 40 ft

Buildings on lot

Stories

Year built

1901

Building material

Brick

Exterior wall

Brick/Masonary

Basement

Sales

Sale date

03/05/2026

Sale price

$3,000,000

Tax

Tax year

2026-2027

Property tax

$8,964

Tax class

Floor area ratio (FAR)

Commercial FAR

Residential FAR

Buildable area

Zoning & Use

Zoning

Qualified opportunity zone

Residential units

Residential sq. ft.

Commercial units

Office sq. ft.

Retail sq. ft.

Lot

Frontage(s)

Union Street (wide)

Distance to wide street

Lot dimensions

20 ft x 90 ft

Lot sq. ft.

1,800

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

Community district

Closest police station

0.40 Miles

Closest fire station

0.02 Miles

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

Ownership

Ownership information for 823 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 823 Union Street, Brooklyn, NY 11215

Sale date	Sale price	Buyer name	Seller name
03/05/2026	$3,000,000	XXXXXX, XXXXX XXX XXXXXX, XXXXXXX	XXX XXXXX XXXXXX XXX

*Most recent sale on record for this property.

More about New York City property records.

Title documents

Date	Type	Party 1	Party 2
03/25/2026 - R 03/05/2026 - D	Mortgage (2026031800376002)	XXXXXX XXXXX	XX XXXXXXXX XXX
03/25/2026 - R 03/05/2026 - D	Deed (2026031800376001)	XXX XXXXX XXXXXX XXX	XXXXXX XXXXX
02/05/2024 - R 04/28/2023 - D	Asgn of Asgn of L&R (2024020100971002)	XXXXXXXXXX XXXX	XXXXXXXX XXXXXX X XXX
02/05/2024 - R 04/28/2023 - D	Assignment, Mortgage (2024020100971001)	XXXXXXXXXX XXXX	XXXXXXXX XXXXXX X XXX
12/13/2022 - R	Initial UCC1 (2022110901077001)	XXX XXXXX XXXXXX XXX	XXXXXXXXXX XXXX
10/19/2017 - R	UCC3 Continuation (2017101600173001)	XXX XXXXX XXXXXX XXX	XXXXXXX XXXXXX XXXX
11/16/2012 - R	UCC3 Termination (2012110700162011)	XXX XXXXX XXXXXX XXX	XXXXXXXX XXXXXXX XXXX XXX
11/16/2012 - R	Initial UCC1 (2012110700162007)	XXX XXXXX XXXXXX XXX	XXXXXXX XXXXXX XXXX X X
11/16/2012 - R 11/02/2012 - D	Assignment of Leases and Rents (2012110700162006)	XXX XXXXX XXXXXX XXX	XXXXXXX XXXXXX XXXX X X
11/16/2012 - R 11/02/2012 - D	Agreement (2012110700162005)	XXX XXXXX XXXXXX XXX	XXXXXXX XXXXXX XXXX X X

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 823 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

$8,964

Municipal exemptions

Recent tax assessments

Market value

$3,960,000

Assessed value

$237,600

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	$4,166,000	$249,960	$42,682	19.843%	$8,469	$8,469	+4.72%
2024/25	$3,699,000	$221,940	$40,266	20.085%	$8,087	$8,087	+6.00%
2023/24	$3,674,000	$220,440	$37,987	20.085%	$7,630	$7,630	-1.10%
2022/23	$3,205,000	$192,300	$37,987	20.309%	$7,715	$7,715	+2.66%
2021/22	$2,940,000	$176,400	$37,645	19.963%	$7,515	$7,515	+0.40%
2020/21	$3,399,000	$203,940	$35,568	21.045%	$7,485	$7,485	+5.39%
2019/20	$3,288,000	$197,280	$33,555	21.167%	$7,103	$7,103	+7.26%
2018/19	$4,111,000	$246,660	$31,656	20.919%	$6,622	$6,622	+2.62%
2017/18	$3,439,000	$206,340	$31,656	20.385%	$6,453	$6,453	+162.33%
2016/17	$2,796,000	$167,760	$12,305	19.991%	$6,271	$2,460	+10.43%

Permits

Permit information for 823 Union Street, Brooklyn, NY

Filing date	Job type	Job status	Job description	Initial cost
05/22/2017	Alteration type 3
02/03/2010	Alteration type 1
09/21/2007	Alteration type 3
07/20/2007	New building
07/20/2007	New building

*Most recent permits on record 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

FEMA flood zones

Hurricane evacuation zones

Subway & traffic

Closest station

Flatbush Ave & Park Pl at SW Corner

Station lines

B-Q

Distance (miles)

0.25

View subway map

Access the detailed traffic volume map for 823 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	0.12
P.S. 282 Park Slope	5	Yes	Public	PK, K-5	496	0.12
St Francis Xavier School	NR	No	Private	PK-8	175	0.06
St Francis Xavier School	NR	No	Private	PK-8	175	0.06
Berkeley Carroll Elementary School	NR	No	Private	PK-12	940	0.10
Berkeley Carroll Elementary School	NR	No	Private	PK-12	940	0.10
Berkeley Carroll School	NR	No	Private	PK-12	977	0.14
P.S. 77	NR	No	Public	K-12	304	0.25
P.S. 321 William Penn	9	No	Public	K-5	1,216	0.26
P.S. 133 William A Butler	6	No	Public	PK, K-5	609	0.41

Nearest middle schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance (miles)
St Francis Xavier School	NR	No	Private	PK-8	175	0.06
Berkeley Carroll Elementary School	NR	No	Private	PK-12	940	0.10
Berkeley Carroll School	NR	No	Private	PK-12	977	0.14
P.S. 77	NR	No	Public	K-12	304	0.25
Ms 266 Park Place Community Middle School	4	No	Public	6-8	69	0.25
Park Slope Christian Academy	NR	No	Private	PK, K-8	37	0.35
Is 340	7	No	Public	6-8	150	0.36
Park Slope Collegiate	4	No	Public	6-12	577	0.42
Poly Prep Lower School	NR	No	Private		0	0.45
Ms 51 William Alexander	7	No	Public	6-8	1,026	0.47

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	0.10
Berkeley Carroll School	NR	No	Private	PK-12	977	0.14
P.S. 77	NR	No	Public	K-12	304	0.25
Millennium Brooklyn High School	10	No	Public	9-12	721	0.42
Park Slope Collegiate	4	No	Public	6-12	577	0.42
John Jay School for Law	3	No	Public	9-12	461	0.42
Cyberarts Studio Academy	2	No	Public	9-12	298	0.42
Poly Prep Lower School	NR	No	Private		0	0.45
St Saviour High School	NR	No	Private	9-12	400	0.56
Brooklyn High School of the Arts	5	No	Public	9-12	927	0.62

Frequently asked questions

What is the year built for 823 Union Street, Brooklyn, NY 11215?

The development at 823 Union Street, Brooklyn, NY 11215 was built in 1901.

What is the total square footage of 823 Union Street, Brooklyn, NY 11215?

823 Union Street, Brooklyn, NY 11215 has a total of 2,736 square feet.

When was 823 Union Street, Brooklyn, NY 11215 last sold and what was the sale price?

823 Union Street, Brooklyn, NY 11215 was last sold on 03/05/2026 for $3,000,000.

What is the assessed value of 823 Union Street, Brooklyn, NY 11215?

823 Union Street, Brooklyn, NY 11215 is currently assessed at $237,600.

What are the property taxes for 823 Union Street, Brooklyn, NY 11215?

The property taxes for 823 Union Street, Brooklyn, NY 11215 total $8,963.

How many residential units does this building have?

This building has 2 residential unit(s).

Disclaimer

All data comes from government sources. No attempt has been made to validate it. No attempt has been made to validate the accuracy of the programming of this website.

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.