823 Union Street

823 Union St
Park Slope

$2,995,000
Price
6
Beds
2,736 Sq. Ft.
$1,095 / Sq. Ft.
2,736
Sq. Ft.
$1,095
per Sq. Ft.
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Contract Signed
Contract Signed
a front view of a house
a living room with furniture and floor to ceiling windows
a living room with furniture and a large window
a dining room with furniture a rug a potted plant and a chandelier
a living room with furniture and a fireplace
a view of a living room and entryway with wooden floor
a bedroom with a bed and wooden floor
a bedroom with a bed and a large window
a bedroom with a bed and a window
a bathroom with a bathtub shower sink vanity and toilet
a view of a hallway with wooden floor and staircase
a kitchen with a refrigerator a stove and a wooden floors
a view of a dinning table and chairs in the patio
a living room with furniture and a chandelier
a kitchen with stainless steel appliances granite countertop a sink and a refrigerator
a view of a tree in front of a house
a picture of a bench

Description

IN CONTRACT  Two family, 3 story + cellar brownstone on 20 x 90 foot lot. Much original detail intact; plaster moldings, wood doors and window shutters. Garden level is a two bedroom, one bath unit with kitchen open to living room, and access to rear garden thru larger bedroom. Upper duplex has large living room with bay window, separate formal dining room and separate kitchen, powder room in hallway. Top floor has four bedrooms and two full baths; one ensuite to front bedroom. Metal deck off...IN CONTRACT  Two family, 3 story + cellar brownstone on 20 x 90 foot lot. Much original detail intact; plaster moldings, wood doors and window shutters. Garden level is a two bedroom, one bath unit with kitchen open to living room, and access to rear garden thru larger bedroom. Upper duplex has large living room with bay window, separate formal dining room and separate kitchen, powder room in hallway. Top floor has four bedrooms and two full baths; one ensuite to front bedroom. Metal deck off dining room on parlor floor. Rear garden. Large cellar contains gas boiler, water heater and meters.
  1. Listed by Jeffery L Welch • Brown Harris Stevens Brooklyn LLC
    P: (718)-399-4132 C: (718)-399-4132 jwelch@bhsusa.com

Property Details for 823 Union Street

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Other
LISTING UPDATED: 02/13/2026 03:07 AM

Property Details for 823 Union Street

StatusContract Signed
MLS IDRLS20057426
Days on Market41
Taxes$710 / month
Maintenance-
Min. Down Pymt-
Total Rooms11.0
Compass TypeTownhouse
MLS TypeHouse/Building
Year Built1901
Lot Size1,800 SF / 90' x 20'
CountyKings County

Building

823 Union St

2 Units2 StoriesBuilt in 1901
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Location

Listing Courtesy of Brown Harris Stevens Brooklyn LLC
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Building Information for 823 Union Street

Stories2Residences2Year Built1901Building Size20' x 40'Building Sq. Ft1,600 SFLot Size1,800 SF / 90' x 20'Building Age-Building Type-

Payment Calculator

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$15,307 per month

30 year fixed, 6.15% Interest

Principal and Interest

$14,597

Property Taxes

$710

Maintenance/Common Charges

$0

The Payment Calculator is for illustrative purposes only.

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Property Information for 823 Union Street

Summary
Location and General Information
  • Subdivision Name: Park Slope
  • Stories Total: 2
  • Garage Spaces: 0.0
  • View: No
Taxes and HOA
  • Tax Lot: 0060
  • Tax Block: 00954
  • Flip Tax: $0
  • Building Tax Lot: 0060
  • Tax Abatement YN: false
Parking
  • Garage: No
  • Garage Spaces Assigned YN: false
Property
Lot Information
  • Building Area Total: 800.0
  • Building Area Units: SquareFeet
  • Lot Size Dimensions: 90.00x20.00
  • Living Area Units: SquareFeet
Building Information
  • Landmark Status YN: false
  • Building Smoke Free YN: true
  • Building Laundry Features: InUnit
  • Building Pets Allowed: BuildingYes
  • Capital Reserves YN: false
  • Green Building YN: true
Property and Assessments
  • New Development: No
  • Sponsor Unit: No
  • Certificate Of Occupancy: Yes
  • Percent Of Common Elements: .00%
  • New Construction: No
  • Structure Type: WalkUp
  • Property Condition: Good
Interior and Exterior Features
Exterior Features
  • Basement: Other
  • Patio And Porch Features: None
Interior Features
  • Entry Level: 1
  • Fireplace Features: Decorative
  • Fireplaces Total: 1
  • Fireplace: Yes
  • Floor Number: 1
  • Basement: Yes
  • Cooling: No
  • ElevatorsTotal: 0
  • Size Dimensions: 40.00x20.00
Multi Family
Multi-Family Information
  • Number Of Units Total: 2
Rental
Rental Information
  • Pets Allowed: UnitNo
  • Delivered Vacant: No
  • Attendance Type: None
  • Land Lease: No

Property History for 823 Union Street

DateEvent & SourcePriceAppreciationLink
Dec 29, 2025

Contract Signed

RLS RESO #RLS20057426

—
Nov 18, 2025

Listed (Active)

RLS RESO #RLS20057426

$2,995,000——
DateEvent & SourcePrice
12/29/2025

Contract Signed

RLS RESO #RLS20057426

—
11/18/2025

Listed (Active)

RLS RESO #RLS20057426

$2,995,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 823 Union Street

Taxable ValueLand$38,460Additions$199,140Total$237,600
Home Facts
Total Finished SqFt2,736 SqFtLot Size1,800 SqFtYear Built1901ZoningR6AAPN3009540060

Schools near 823 Union Street

This home is within New York City Geographic District #13.
Rating
School
Type
Grades
Distance
P.S. 282 Park Slope
Public - PK to 5
Ms 266 Park Place Community Middle School
Public - 6 to 8
GOTHAM PROFESSIONAL ARTS ACADEMY
Public - 9 to 12
P.S. 133 William A Butler
Public - PK to 5
Rating
School
Distance
P.S. 282 Park Slope
PublicPK to 5

Ms 266 Park Place Community Middle School
Public6 to 8

GOTHAM PROFESSIONAL ARTS ACADEMY
Public9 to 12

P.S. 133 William A Butler
PublicPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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Listing Courtesy of Brown Harris Stevens Brooklyn LLC

This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey® MLS. Information Copyright 2026, OneKey® MLS. All data is deemed reliable but is not guaranteed accurate by Compass. See Terms of Service for additional restrictions. Compass · Tel: 212-913-9058 · New York, NY Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York’s Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer’s personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This information is not guaranteed, should be independently verified and may not reflect all real estate activity in the market. Offers of compensation set forth here are for other RLSParticipants only and may not reflect other agreements between a consumer and their broker.©2026 The Real Estate Board of New York, Inc., All rights reserved.