Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,995,000

· Closed June 18, 2020

420 12TH Street #B3R
Closed For Sale Co-op

$1,995,000

420 12TH Street #B3R

Park Slope, Brooklyn

Ansonia Court

MLS® #RLS10622802

RLS at REBNY

Listing by The Corcoran Group

3

Bedrooms

2.5

Baths

N/A

Sq. Ft.

1881

Year Built

Quick Summary

Bedrooms 3
Bathrooms 3 full, 1 half
Year Built 1881
Ownership Co-op
Maintenance $1,504.1/mo
Neighborhood Park Slope
Floor 3 of 4

Property Highlights

  • Exposure: East,West facing
  • Outdoor Space: Balcony
  • Style: Prewar architecture

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 2 Full, 1 Half
Floor 3 of 4
Exposure East,West
Cooling Wall Units
Pets Yes
Cross Street 12th Street & 7th Avenue
Year Built 1881
Architectural Style Prewar
Parcel # 01098-0001-00420-000-0000B3R

Listing History

Event Date Price Change
Listed Mar 2, 2020 $1,995,000 -
Currently Apr 26, 2026 $1,995,000 -

Description

420 12th Street, B3RBrick & Beam architect-designed converted 3 bedroom (formerly a two bedroom) 2.5 bathroom duplex loft in the highly sought after Ansonia Court awaits. Turn-of-the-century industrial details meets an impeccably designed renovation and restoration. This special home features a magazine-worthy open-plan main living space with expansive living room, chefs kitchen, dining room and powder room. Upstairs is home to the three bedrooms (formerly 2 bedrooms) and two spa baths.The renovated kitchen features a sizable island complete with Carrera marble countertops, Shaws farm sink and top-of-the-line stainless steel appliances. A large pantry opposite the kitchen is the solution for all your storage needs. The dining area features a built-in marble-topped sideboard with an office nook and open shelving above. The updated powder room is discreetly tucked under the stairs.Upstairs, the generous master suite includes a sparkling marble-clad master bath with rainwater showerhead. A private balcony off the master suite provides spectacular courtyard and sunset views.Another updated bathroom on the second floor features a clawfoot tub and Kohler utility sink. A second bedroom converted to two light-filled bedrooms top it off with custom built-in bookcases and an etched-glass pocket door, which allows for a supersized communal open space or two completely separate rooms with their own entrances. Included as well: full-sized washer/dryer, new high-efficiency boiler, stroller parking and great storage throughout.This loft is located in the heart of the South Slope. World class dining, cafes and pubs as well as Union Market are just steps away. The F and G trains are just 3 blocks away, and beautiful Prospect Park and playgrounds galore can be found at the end of 12th Street.

Features & Amenities

Interior Features

Separate Formal Dining Room Entrance Foyer Eat In Kitchen Building Washer Dryer Install Allowed Common On Floor Common Area

Exterior Features

Building Courtyard Building Garden Balcony Juliet Balcony Balcony

Appliances

Dryer Washer

Building Information

Financial Details

Maintenance $1,504.1/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

110

Median Asking Price

$1.70M

Median $/Sqft

$1,376

Avg Days on Market

N/A

New This Week

15

Price Reduced

16%

Sold (30 Days)

20

Median Sale Price

$1.66M

Live data from RLS at REBNY • Updated 4/26/26, 3:31 PM EST

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Location

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420 12TH Street #B3R, Park Slope, Kings County • Near 12th Street & 7th Avenue

Floor Plans

Floor Plan

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 $1,504.1 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 3 bedrooms and 2 full bathrooms 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 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) 416-7433
MLS® ID: RLS10622802
First Listed: 3/2/2020
Closed: 6/18/2020
Contract Date: 3/8/2020

Listing Courtesy of The Corcoran Group - Jessica Buchman

Listing Contact: (917) 579-8641

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 4/26/2026 at 7:31 PM UTC

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