Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
420 12TH Street #A3R
Closed For Sale Co-op

$900,000

420 12TH Street #A3R

Park Slope, Brooklyn

Ansonia Court

MLS® #RLS10052758

RLS at REBNY

Listing by The Corcoran Group

2

Bedrooms

2

Baths

N/A

Sq. Ft.

1881

Year Built

Quick Summary

Bedrooms 2
Bathrooms 2
Year Built 1881
Ownership Co-op
Maintenance $1,095/mo
Neighborhood Park Slope

Property Highlights

  • Exposure: North,South facing
  • Style: Prewar architecture
  • Character: Pre-war building (1881)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 7
Baths null Full
Exposure North,South
Pets Yes
Cross Street 12th Street & 7th Avenue
Year Built 1881 (New)
Architectural Style Prewar
Parcel # 01098-0001-00420-000-0000A3R

Listing History

Event Date Price Change
Listed Oct 3, 2012 $895,000 -
Currently May 5, 2026 $900,000 +0.6%

Description

Magical 2 bedroom, 1.5 bathroom loft apartment at the coveted Ansonia Court lofts in Park Slope. The Ansonia boasts a lovely common courtyard and is located just steps from the F train, all the chic South Slope restaurants & shops and glorious Prospect Park. This duplex home has soaring ceilings with the original wood beams, hardwood floors, 2 real bedrooms, 1 and 1/2-baths, washer/dryer PLUS tons of storage through out the apartment. Stylish, efficient and room to grow, this property has it all~ Apartment Features: North exposure, South exposure, Full garden view, Beamed ceiling, Floors - hardwood, Light - excellent, Windows - oversized, Modern kitchen, Walk in closets, Great closet space, Washer/dryer, Dishwasher Building Features: Courtyard

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed Common Area

Exterior Features

Building Courtyard Building Garden

Building Information

Financial Details

Maintenance $1,095/mo
Original Price $895,000

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

114

Median Asking Price

$1.67M

Median $/Sqft

$1,391

Avg Days on Market

N/A

New This Week

17

Price Reduced

15%

Sold (30 Days)

25

Median Sale Price

$1.59M

Live data from RLS at REBNY • Updated 5/5/26, 12:59 PM EST

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Location

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420 12TH Street #A3R, Park Slope, Kings County • Near 12th Street & 7th Avenue

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 $1,095 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 2 bedrooms and 2 full bathrooms.

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: RLS10052758
First Listed: 10/3/2012
Closed: 3/6/2013

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 5/5/2026 at 4:59 PM UTC

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