Date
Details
Price
Change
Source
11/18/2025
Listed
$2,995,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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1/16
$2,995,000
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Property 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 dining room on parlor floor. Rear garden. Large cellar contains gas boiler, water heater and meters.
Full Property Details
Full Property Details for 823 Union St
General
- Price: $2,995,000
- Taxes: $8,520
- Status: Active
- Type: Multi-Family
- Source: REBNY
- MLS ID: RLS20057426
- Updated: 12/29/2025
- Added to Site: 60 day(s) ago
Interior
- Number of Rooms: 11
- Interior Features: Smoke Free
- Fireplace: Yes
- Number of Fireplaces: 1
- Fireplace(s): Decorative
Rooms
Bathrooms
- Total Bathrooms: 4
- Full Bathrooms: 3
- Half Bathrooms: 1
Bedrooms
- Total Bedrooms: 6
Other Rooms
- Laundry: In Unit
Exterior
- Exterior Features: Private Outdoor Space Over 60 Sqft
Location
- County: Kings
- Subdivision: Park Slope
Community
- Pets Allowed: Yes
Structural Information
- Architectural Style: Walk-Up
- Basement Desc.: Other
- Stories/Levels: 2
- Year Built: 1901
- Other Struct. Feat.: Green Building
Lot Features
- Property View: Other
- Lot Size: 1800
- Lot Dimensions: 90.00 x 20.00
Financial Considerations
- Tax Amount: $8,520
Disclosures and Reports
- Special Conditions: Standard
- Property ID: 00954-0060
- Block: 954
- Lot Number: 60
Listing Courtesy of Brown Harris Stevens Brooklyn LLC
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Listing agent
— 823 Union St —
Brown Harris Stevens Brooklyn LLC
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Schools
Schools serving 823 Union St
School District:New York City Geographic School District 13
| Name | Grades | Distance |
|---|---|---|
Ps 282 Park Slope 180 6th Avenue, Brooklyn, NY 11217 | PK-8 | 0.1 mi |
Disclaimer:
School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 823 Union St
Tax History
Tax History for 823 Union St
Year
Property Taxes
Change
Tax Assessment
Change
2025
$8,573
6%
$42,682
-81%
2024
$8,087
6%
$221,940
1%
2023
$7,630
-1%
$220,440
15%
2022
$7,715
-51%
$192,300
9%
2021
$15,845
110%
$176,400
-14%
2020
$7,529
6%
$203,940
3%
2019
$7,103
10%
$197,280
523%
2017
$6,453
157%
$31,656
1%
2016
$2,515
10%
$31,371
6%
2015
$2,279
68%
$29,664
6%
2014
$1,359
-21%
$28,072
11%
2013
$1,725
—
$25,380
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 823 Union St
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823 Union Street, New York City, NY 11215 (MLS# RLS20057426) is a Multi-Family property with 2 units containing 6 bedrooms, 3 full bathrooms and 1 partial bathroom. 823 Union Street is currently listed for $2,995,000 and was received on November 18, 2025. Want to learn more about 823 Union Street? Do you have questions about finding other Multi-Family real estate for sale in New York City? You can browse all New York City real estate or contact a Coldwell Banker agent to request more information.