Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,200,000

· Closed February 10, 2021

821A Union Street #3
Closed For Sale Co-op

$1,200,000

$889 per sq ft

821A Union Street #3

Park Slope, Brooklyn

MLS® #RLS10653655

RLS at REBNY

Listing by Compass

3

Bedrooms

1

Bath

1,350

Sq. Ft.

1920

Year Built

Quick Summary

Bedrooms 3
Bathrooms 1
Living Area 1,350 sq ft
Year Built 1920
Ownership Co-op
Maintenance $750/mo
Neighborhood Park Slope

Property Highlights

  • Style: Prewar architecture
  • Climate Control: Window Units
  • Character: Pre-war building (1920)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 6
Baths 1 Full
Cooling Window Units
Pets Yes
Cross Street 6th Avenue/7th Avenue
Year Built 1920
Living Area 1,350 sq ft
Architectural Style Prewar
Block/Lot 954/62

Listing History

Event Date Price Change
Listed Jul 30, 2020 $1,200,000 -
Currently Apr 26, 2026 $1,200,000 -

Description

Open, airy, and bright. Come home to a wonderful turnkey 3 bedroom plus office coop on prime Union Street, convertible to 4 bedrooms. You will love cooking meals in your thoughtfully designed chefs kitchen with stainless steel appliances, and extra counter space. Entertaining family and friends in the adjacent living-dining area will be a breeze, with the open airy layout, high ceilings and sunshine streaming in. There is a large primary bedroom with a lovely view, a walk-in closet across the hallway, as well as two additional well-proportioned bedrooms, all with over-sized windows. The bedrooms are tucked down the hall from the living space. An inviting front office library could be an ideal work-from-home space, or converted easily into a fourth bedroom. The three existing bedrooms are in the back of the apartment and are very quiet. This beautiful home has gorgeous hardwood floors, an easy layout, plenty of charm and generous closet space. The well appointed hall bathroom has been freshly updated. There is extra storage in the building basement. A second bathroom is easy to add as well as a washer-dryer. 821A Union Street is a warm and pet friendly coop, with low monthlies and laundry in the basement. All of Park Slope's favorite attractions are just steps away with 5th and 7th Avenue shopping and restaurants right there, as well as irresistible Prospect Park. The Park Slope Playground is one block away. The 2,3, B, Q and R trains are all within a short distance.

Building Information

Financial Details

Maintenance $750/mo
Sale Price $1,200,000

Park Slope is a well-known Brooklyn neighborhood, recognized for its tree-lined streets and preserved brownstones. Bordering the western edge of Prospect Park, the neighborhood offers convenient access to green space. The real estate market features a mix of historic townhouses, cooperatives, and modern condominiums, within walking distance of the park.

Park Slope Live Market Data

View Neighborhood

Active Listings

110

Median Asking Price

$1.70M

Median $/Sqft

$1,376

Avg Days on Market

N/A

New This Week

15

Price Reduced

16%

Sold (30 Days)

20

Median Sale Price

$1.66M

Live data from RLS at REBNY • Updated 4/25/26, 9:42 PM EST

Similar Listings in Park Slope

View All

Location

Loading map...

821A Union Street #3, Park Slope, Kings County • Near 6th Avenue/7th Avenue

Floor Plans

Floor Plan

Building Information

Official NYC property records for this building

1920
Year Built
106 years old
4
Floors
4
Residential Units
R6A
Zoning District
Walk-Up Apartments

Tax & Assessment

Assessed Value: $1,102,050
Land Value: $12,600
Exemptions: $0

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 2,025 SF
Building Area: 5,940 SF
Built FAR: 2.93
Allowed FAR: 3

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $750 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 3 bedrooms and 1 full bathroom.

The listed interior living area is 1,350 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1920, making it approximately 106 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pet policy requires confirmation with the listing broker.

At the current list price of $1,200,000 for 1,350 sq ft, the asking price per square foot is approximately $889. This figure is for reference only and may differ from appraised or assessed values.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or mcoste@kwnyc.com. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS10653655
First Listed: 7/30/2020
Price Changed: 2/5/2021
Closed: 2/10/2021
Contract Date: 7/31/2020

Listing Courtesy of Compass - Scott Klein

Listing Contact: (347) 423-9483

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 advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 4/26/2026 at 1:42 AM UTC

Buying a Co-op? Start Here

Co-op vs. Condo: Which Is Right for You?

Ownership structure, board approval, financing: the full comparison.

Read article

How to Ace Your Co-op Board Interview

What boards look for, common questions, and how to prepare.

Read article

NYC Flip Tax Guide for Sellers

What co-op flip taxes are, how they're calculated, and who pays.

Read article

HDFC Co-ops: Complete Guide

Income limits, resale caps, and how to qualify for affordable co-ops.

Read article

Interested in this property?

Get a response within 2 hours

Your info is secure and never shared.

View Active Listings Call Milton