SOLD FOR $1,200,000
· Closed February 10, 2021
821A Union Street #3
MLS® #RLS10653655
Listing by Compass
3
Bedrooms
1
Bath
1,350
Sq. Ft.
1920
Year Built
Quick Summary
Property Highlights
- Style: Prewar architecture
- Climate Control: Window Units
- Character: Pre-war building (1920)
Property Details
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
About Park Slope
View All Park Slope ListingsPark 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 NeighborhoodActive 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
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Location
821A Union Street #3, Park Slope, Kings County • Near 6th Avenue/7th Avenue
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
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
Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
Market Data
RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.
Map & Location
OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.
All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.
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) 416-7433Listing 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 Data display by Keller Williams NYC. Data last updated on 4/26/2026 at 1:42 AM UTC