Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,995,000

· Closed June 27, 2025

420 12th Street #E1L
Closed For Sale Co-op

$1,995,000

420 12th Street #E1L

Park Slope, Brooklyn

MLS® #RLS20012034

RLS at REBNY

Listing by Compass

2

Bedrooms

1.5

Baths

N/A

Sq. Ft.

1881

Year Built

Quick Summary

Bedrooms 2
Bathrooms 2 full, 1 half
Year Built 1881
Ownership Co-op
Maintenance $1,799/mo
Neighborhood Park Slope
Floor 1 of 4

Property Highlights

  • Outdoor Space: Terrace
  • Style: WalkUp architecture
  • Character: Pre-war building (1881)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 4
Baths 1 Full, 1 Half
Floor 1 of 4
Pets Yes, CatsOk, DogsOk
Year Built 1881
Architectural Style WalkUp
Flooring Hardwood
Furnished Unfurnished
Parcel # 01098-0001-00420-000-0000E1L
Block/Lot 01098/0001

Listing History

Event Date Price Change
Listed Mar 26, 2025 $1,995,000 -
Currently May 29, 2026 $1,995,000 -

Description

This spectacular 2BR/1.5BA duplex (convertible 3BR) at the coveted Ansonia Court was completely redesigned by its current owners to create a sophisticated and functional space with stunning designer finishes. In collaboration with a boutique architecture firm based in Dumbo (e.g. Projects), the entire space was reoriented to feel more open and loft-like while maximizing functionality. In the kitchen, a terrazzo backsplash imported from Italy adds natural color and is a cheerful contrast to the custom white millwork with charcoal-colored upper cabinets and solid oak shelves. There is ample counter space and a dining area that easily accommodates 8. The kitchen includes luxury fixtures such as pendants from Stickbulb and Design Within Reach, a Dornbracht faucet, a Bosch dishwasher, and integrated refrigerator. It also includes highly functional features such as a walk-in pantry, wine refrigerator and garbage disposal. The spacious living room has high ceilings, oversized windows, exposed brick, custom built-ins and easy access to your own private terrace with ample space for a table, chairs and grill. To create better flow between the living and dining spaces, a metal stair rail was installed with clever under-stair drawers and a small closet to stow away everyday items. An entry foyer with a coat closet and renovated powder room completes the first level. This level also includes newly installed motorized shades from the Shade Store. On the upper level, two bright and sunny oversized bedrooms with soaring ceilings await, along with a full bathroom, washer-dryer, and linen closet. The serene primary bedroom features Calico wallpaper, stylish sconces and a wall of custom closets. The larger bedroom overlooks the building's lush courtyard and has custom closets, two built-in desks and a bonus loft-like space that can be used as a work space or play area. Architectural plans are available to convert this room into two separate bedrooms creating the elusive 3BR in Park Slope (per the alternate floor plan). A full bathroom features radiant heated floors, Ann Sacks ribbed tile and ample custom storage. Ansonia Court is a pet-friendly building that combines historic charm with modern amenities and is known for its European-style interior courtyard. With a lawn, benches and beautiful landscaping, it offers a peaceful retreat and common area for residents to use. Other building amenities include a full-time superintendent, package room, and bicycle and stroller storage. Enjoy easy access to Prospect Park and South Slope’s excellent dining options including Winner, Miolin Bakery, Pasta Louise, Ottava, Lore, Union Market and more. Transportation options include the F/G subway lines just three blocks away at 9th Street. Contact us to schedule a private viewing!

Features & Amenities

Interior Features

High Ceilings Kitchen Island Building Washer Dryer Install Allowed In Unit Flooring: Hardwood

Exterior Features

Private Outdoor Space Over60 Sqft Terrace

Appliances

Dishwasher Wine Cooler

Building Information

Building Data View Compliance & Permits
Total Units 70
Stories 4
Style WalkUp

Financial Details

Maintenance $1,799/mo
Sale Price $1,995,000

Park 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 Neighborhood

Active Listings

120

Median Asking Price

$1.78M

Median $/Sqft

$1,425

Avg Days on Market

N/A

New This Week

14

Price Reduced

19%

Sold (30 Days)

12

Median Sale Price

$2.27M

Live data from RLS at REBNY • Updated 5/29/26, 10:53 AM EST

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Location

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420 12th Street #E1L, Park Slope, Kings County

Floor Plans

Floor Plan 1
Floor Plan 2

Building Information

Official NYC property records for this building

1881
Year Built
145 years old
4
Floors
70
Residential Units
R6B
Zoning District
Walk-Up Apartments Historic District: Park Slope Historic District Extension

Tax & Assessment

Assessed Value: $7,875,900
Land Value: $958,500
Exemptions: $36,640

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 40,800 SF
Building Area: 109,380 SF
Built FAR: 2.68
Allowed FAR: 2

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

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $1,799 per month. Confirm the exact amount with the listing broker before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 2 bedrooms and 1 full bathroom and 1 half bathroom.

According to MLS records, the building was constructed in 1881, making it approximately 145 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.

Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.

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) 416-7433
MLS® ID: RLS20012034
First Listed: 3/26/2025
On Market: 3/26/2025
Price Changed: 3/26/2025
Closed: 6/27/2025
Contract Date: 3/19/2025

Listing Courtesy of Compass - Lia Wiedemann

Listing Contact: (917) 538-7449

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 at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 5/29/2026 at 2:53 PM UTC

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