821 UNION Street #2
MLS® #RLS10085337
Listing by Brown Harris Stevens Residential Sales LLC
4
Bedrooms
1
Bath
N/A
Sq. Ft.
N/A
Year Built
Quick Summary
Property Highlights
- Exposure: North,South facing
- Style: Prewar architecture
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Mar 7, 2016 | $895,000 | - |
| Currently | May 2, 2026 | $1,150,000 | +28.5% |
Description
821A Union Street. Just one flight up, this sprawling four bedroom townhouse coop apartment in the heart of Park Slope is ready for renovation. It has wonderful details--tin ceilings, wide pine plank floors, large south-facing front bay window-- but needs EVERYTHING. That means new kitchen, new bathroom, new windows, new appliances and fixtures, and probably wiring and plumbing as well. It is a blank slate for you to design your dream home. The property is priced to reflect condition and required costs to renovate and carry while doing so. The four-story, four-family building has laundry and storage in the basement. Bring your contractor and your imagination.
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
$1.62M
Median $/Sqft
$1,339
Avg Days on Market
N/A
New This Week
14
Price Reduced
16%
Sold (30 Days)
23
Median Sale Price
$1.64M
Live data from RLS at REBNY • Updated 5/2/26, 5:05 AM EST
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Location
821 UNION Street #2, Park Slope, Kings County
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 4 bedrooms and 1 full bathroom.
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.
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 Brown Harris Stevens Residential Sales LLC - Juliet Braver
Listing Contact: (718) 858-5905
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 5/2/2026 at 9:05 AM UTC