910 Union Street #5B
MLS® #RLS20076460
Listing by Compass
3
Bedrooms
2.5
Baths
1,525
Sq. Ft.
1931
Year Built
Quick Summary
Property Highlights
- Climate Control: Central Air
- Character: Pre-war building (1931)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Mar 11, 2026 | $2,575,000 | - |
| Currently | May 15, 2026 | $2,825,000 | +9.7% |
Description
Experience elevated living at 910 Union Street, Apt 5B—a beautifully renovated 3-bedroom, 2.5-bath condo in Park Slope. Arrive via private keyed elevator into a dedicated landing with custom storage for strollers and gear. The sun-drenched interior features soundproof white oak floors, floor-to-ceiling windows, and multi-zone climate control. The chef’s kitchen boasts stone countertops, Bosch appliances, and a mobile marble island that flows seamlessly into a living area with custom built-ins and a large terrace overlooking Grand Army Plaza. The king-sized primary suite serves as a serene retreat with a walk-in closet and motorized shades, while two additional bedrooms—one with a private balcony—provide flexible space for family or a home office. This full-service building includes a 6-day doorman, gym, playroom, and roof deck. Ideally located steps from Prospect Park, major subways, and zoned for PS 321. The building was converted to condominiums in 2013.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
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
115
Median Asking Price
$1.70M
Median $/Sqft
$1,408
Avg Days on Market
N/A
New This Week
15
Price Reduced
17%
Sold (30 Days)
0
Median Sale Price
N/A
Live data from RLS at REBNY • Updated 5/15/26, 4:26 AM EST
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Location
910 Union Street #5B, 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 common charges are $1,647 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $9,372, or roughly $781 per month. Verify the current assessment with your attorney before closing.
This property has 3 bedrooms and 2 full bathrooms and 1 half bathroom.
The listed interior living area is 1,525 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1931, making it approximately 95 years old.
This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.
Pet policy requires confirmation with the listing broker.
At the current list price of $2,825,000 for 1,525 sq ft, the asking price per square foot is approximately $1,852. 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 [email protected]. 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 - Joseph Ryan
Listing Contact: (718) 399-4103
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 5/15/2026 at 8:26 AM UTC