SOLD FOR $899,000
· Closed January 31, 2019
658 UNION Street #APT1
MLS® #RLS10427007
Listing by Halstead dba Brown Harris Stevens Residential Sales LLC
1
Bedroom
1.5
Baths
1,149
Sq. Ft.
N/A
Year Built
Quick Summary
Property Highlights
- Location: Park Slope, Brooklyn
- Property Type: Condo
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 11, 2018 | $998,000 | - |
| Price Reduced | Oct 28, 2018 | $985,000 | -1.3% |
| Currently | Apr 28, 2026 | $899,000 | -8.7% |
Description
Charming garden duplex in prime Park Slope! This floor-through residence is less like a condo and more like a house. Pass through a private keypad entry and into an open kitchen-dining area with plenty of space for cooking and entertaining. The upper level of this unique apartment includes a full bathroom and a sunny, South facing living room that exits onto to beautiful garden with a working hot tub. The lower level functions as a bedroom suite with two generous closets, half-bath, private (in-unit) laundry room, and additional access to the garden. Low common charges of $293, a tax abatement (until 2024), and basement storage make this unique property ideal for investors and end-users alike.
658 Union Street is convenient to the R,D,N,Q,B,2,3,4,5 trains and LIRR, Prospect Park, Barclays Center, BAM, and is surrounded by the beautiful brownstone blocks, restaurants, shopping and amenities that make Park Slope one of Brooklyn's most sought-after locations.
Features & 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
111
Median Asking Price
$1.72M
Median $/Sqft
$1,376
Avg Days on Market
N/A
New This Week
12
Price Reduced
17%
Sold (30 Days)
21
Median Sale Price
$1.66M
Live data from RLS at REBNY • Updated 4/27/26, 10:09 PM EST
Similar Listings in Park Slope
View All
Active
185 18th Street #602
Condo • RLS #RLS20080577
Active
841 Union Street #508
Condo • RLS #RLS20087028
Active
398 13th Street #4B
Co-op • RLS #RLS20080833
Active
575 4th Avenue #3F
Condo • RLS #RLS20082923
Active
659 Baltic Street #3
Condo • RLS #RLS20014672
Active
135 Prospect Park #32A
Co-op • RLS #RLS20084674
Browse More NYC Properties
In This Neighborhood
By Property Type
By Borough
Location
658 UNION Street #APT1, 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 $293 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $312, or roughly $26 per month. Verify the current assessment with your attorney before closing.
This property has 1 bedroom and 1 full bathroom and 1 half bathroom.
The listed interior living area is 1,149 square feet. Verify dimensions independently during due diligence.
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 $899,000 for 1,149 sq ft, the asking price per square foot is approximately $782. 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 Halstead dba Brown Harris Stevens Residential Sales LLC - Helen Alexandra Como Saghir
Listing Contact: (917) 721-2945
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 4/28/2026 at 2:09 AM UTC