259 21ST Street #BA
MLS® #RLS10070378
Listing by The Corcoran Group
1
Bedroom
1
Bath
1,100
Sq. Ft.
2006
Year Built
Quick Summary
Property Highlights
- Outdoor Space: Building Terrace
- Style: Loft architecture
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Jun 27, 2018 | $915,000 | - |
| Currently | Apr 29, 2026 | $915,000 | - |
Description
Welcome to the coveted Saint Johns Condominium... Apartment BA at 259 21st Street, an 1100 square foot loft style apartment with high ceilings and 159 square feet of private outdoor space. The former St Johns School was built in 1901 and converted to loft condos in 2004. The unit features an open and airy layout with room to design you own style with a bonus of private outdoor space. Currently set-up as a loft studio this very diverse open space can easily be configured to many different layouts to include a bedroom or two. This unit has a private entrance through the side gate for easy entering the apartment from street level and not having to go through the main entrance. The St. Johns Condominium is a pet-friendly building with a live-in super and features an elevator-accessed 5,000 square foot roof deck. From this vantage point you can take in some of the most stunning harbor and city views that Brooklyn has to offer. Situated on a very quiet and friendly tree-lined block with easy street parking and close subway access to the R, F, and G trains all within walking distance. Enjoy some of Brooklyn's finest food and drink, including Greenwood Park, Korzo and Giuseppina's Brick Oven Pizza. You will enjoy walking through Prospect Park, taking the trolley tour through Green-Wood Cemetery and the recently renovated Slope Park playground just blocks away. Assessment of $68.67. Call for a private showing.
Features & Amenities
Interior Features
Exterior Features
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
113
Median Asking Price
$1.73M
Median $/Sqft
$1,391
Avg Days on Market
N/A
New This Week
14
Price Reduced
17%
Sold (30 Days)
25
Median Sale Price
$1.64M
Live data from RLS at REBNY • Updated 4/29/26, 6:40 PM EST
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Location
259 21ST Street #BA, Park Slope, Kings County • Near 5th Avenue & 6th 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 common charges are $295.27 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $1,555.92, or roughly $130 per month. Verify the current assessment with your attorney before closing.
This property has 1 bedroom and 1 full bathroom.
The listed interior living area is 1,100 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 2006, making it approximately 20 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.
Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $915,000 for 1,100 sq ft, the asking price per square foot is approximately $832. 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 The Corcoran Group - Lisa Lonuzzi
Listing Contact: (917) 747-2942
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 4/29/2026 at 10:40 PM UTC