New York City » 11215 » Union St » 821 A Union St

821 A Union Street, Brooklyn, NY 11215 - Property report

Also known as: 821 A Union St

Property image for 821 A Union Street, Brooklyn, NY 11215

Property type

Walk-up Cooperative Building (Other than Condominiums) (XC6)

Year built

1920

Lot sq. ft.

2,025

General information

Address

Primary address

821 A Union Street

ZIP code

11215

Neighborhood

Park Slope

Borough

Brooklyn

Block & lot

00954-0061

Building

Property type

Walk-up Cooperative Building (Other than Condominiums) (XC6)

Building sq. ft.

5,940

Building dimensions

22.5 ft x 65 ft

Buildings on lot

Stories

Year built

1920

Tax

Tax year

2026-2027

Property tax

$17,699

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

22.5 ft x 90 ft

Lot sq. ft.

2,025

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.

Units for 821 A Union Street, Brooklyn, NY

Unit	Sale date	Sale price
Unit 2	06/02/2016
Unit 3	01/28/2021
Unit 4	08/19/2019
Unit APT
Unit RES

Ownership

Ownership information for 821 A 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 821 A Union Street, Brooklyn, NY 11215

No recently recorded sales for this property.

More about New York City property records.

Title documents

Date	Type	Party 1	Party 2
03/09/2001 - R	UCC3 Termination (3830007552883)	XXXXX XXXX	XXXXX XXXXXXXX XXXXXXXX
03/11/1997 - R	UCC3 Assignment (3350005522835)	XXXXXX XXXXXX	XXX XXXXXXX XXX XXXXXXXXXXX XXXXXXXXXXXXXXXXX
04/01/1996 - R	Initial Coop UCC1 (3880005100288)	XXXXXX XXXXXX	XXX XXXXXXX XXX XXXXXXXXXXX XXXXXXXXXXXXXXXXX
08/23/1993 - R	Initial Coop UCC1 (3910003987591)	XXXXX XXXX	XXXXX XXXXXXXX XXXXXXXX
01/27/1982 - R	Deed (3140000897514)	XXXXX XXXXXXXX	XXXX XXXXXXX XXXX
03/03/1980 - R	Mortgage (38030114401568)	XXXX XXXX XXXX	XXXXXXXXXXXX XXXX XX
03/03/1980 - R	Deed (38030114401566)	XXXX XXXX XXXX	XXXXX XXXXXX
03/03/1980 - R	Deed (38030114401564)	XXXXXXX XXXX	XXXX XXXX XXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 821 A 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

$17,699

Municipal exemptions

Recent tax assessments

Market value

$2,449,000

Assessed value

$1,102,050

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	$2,746,000	$1,235,700	$132,496	12.439%	$16,481	$11,827	-0.67%
2024/25	$3,432,000	$1,544,400	$132,496	12.5%	$16,562	$11,907	+4.15%
2023/24	$2,860,000	$1,287,000	$126,265	12.502%	$15,786	$11,433	+6.57%
2022/23	$2,810,000	$1,264,500	$117,543	12.267%	$14,419	$10,728	+14.03%
2021/22	$3,093,000	$1,391,850	$107,060	12.235%	$13,391	$9,408	-22.94%
2020/21	$3,012,000	$1,355,400	$99,530	12.267%	$12,503	$12,209	+0.64%
2019/20	$2,510,400	$1,129,680	$97,260	12.473%	$12,712	$12,131	+4.29%
2018/19	$2,092,000	$941,400	$92,227	12.612%	$12,250	$11,632	+9.42%
2017/18	$1,800,000	$810,000	$83,578	12.719%	$11,500	$10,630	+6.93%
2016/17	$1,640,000	$738,000	$77,112	12.892%	$10,854	$9,941	+8.15%

Permits

Permit information for 821 A Union Street, Brooklyn, NY

Filing date	Job type	Job status	Job description	Initial cost
12/18/2025	Alteration
10/27/2025	Alteration
11/05/2020	Alteration
08/06/2020	Alteration
02/11/2020	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
	05/06/2026	A
	11/19/2025	I
	06/11/2025	A

*Most recent HPD violations on record 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)

0.251

View subway map

Access the detailed traffic volume map for 821 A 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	0.11
P.S. 282 Park Slope	5	Yes	Public	PK, K-5	496	0.11
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	0.40

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	0.37
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	0.46

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
John Jay School for Law	3	No	Public	9-12	461	0.42
Cyberarts Studio Academy	2	No	Public	9-12	298	0.42
Park Slope Collegiate	4	No	Public	6-12	577	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

Neighbors for 821 A Union Street, Brooklyn, NY

174 St Johns Pl, Brooklyn 763 President St, Brooklyn 566 Carroll St, Brooklyn 223 5th Ave, Brooklyn 170 St Johns Pl, Brooklyn 219 5th Ave, Brooklyn 206 5th Ave, Brooklyn 48 Lincoln Pl, Brooklyn 129 Berkeley Pl, Brooklyn 179 6th Ave, Brooklyn 211 5th Ave, Brooklyn 230 5th Ave, Brooklyn 204 6th Ave, Brooklyn 2 Lincoln Pl, Brooklyn 799 President St, Brooklyn 543 Carroll St, Brooklyn 140 A 7th Ave, Brooklyn 22 Lincoln Pl, Brooklyn 176 St Johns Pl, Brooklyn

Frequently asked questions

What is the year built for 821 A Union Street, Brooklyn, NY 11215?

The development at 821 A Union Street, Brooklyn, NY 11215 was built in 1920.

What is the total square footage of 821 A Union Street, Brooklyn, NY 11215?

821 A Union Street, Brooklyn, NY 11215 has a total of 5,940 square feet.

What is the assessed value of 821 A Union Street, Brooklyn, NY 11215?

821 A Union Street, Brooklyn, NY 11215 is currently assessed at $1,102,050.

What are the property taxes for 821 A Union Street, Brooklyn, NY 11215?

The property taxes for 821 A Union Street, Brooklyn, NY 11215 total $17,698.

How many residential units does this building have?

This building has 4 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.