Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,640,000

Listed at $1,675,000 · Sold 2.1% below asking · Closed February 21, 2019

420 12TH Street #L1R
Closed For Sale Co-op

$1,675,000

420 12TH Street #L1R

Park Slope, Brooklyn

Ansonia Court

MLS® #RLS10506038

RLS at REBNY

Listing by The Corcoran Group

3

Bedrooms

1.5

Baths

N/A

Sq. Ft.

1881

Year Built

Quick Summary

Bedrooms 3
Bathrooms 2 full, 1 half
Year Built 1881
Ownership Co-op
Maintenance $1,554.5/mo
Neighborhood Park Slope
Floor 1 of 4

Property Highlights

  • Exposure: East,West facing
  • Style: Prewar architecture
  • Climate Control: Window Units

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 7
Baths 1 Full, 1 Half
Floor 1 of 4
Exposure East,West
Cooling Window Units
Pets Yes
Cross Street 12th Street & 7th Avenue
Year Built 1881
Architectural Style Prewar
Parcel # 01098-0001-00420-000-0000L1R

Listing History

Event Date Price Change
Listed Sep 26, 2018 $1,850,000 -
Currently Apr 28, 2026 $1,675,000 -9.5%

Description

420 12th Street #L1R BRICK & TIMBER loft style perfection at the coveted Ansonia Court. This renovated and re-imagined 1st floor duplex loft is simply dreamy. Through the European lush interior courtyard sits this over-sized 3 bedroom, 1.5 bathroom open plan loft space. Gracious in proportions, this loft home has it all. The open enormous windowed custom white chefs eat in kitchen complete with chef grade appliances is perfect for casual dining and meal preparation. There are no compromises with the open living room with its massive windows and sweet private deck for grilling and entertaining. This unique duplex floor-plan has a large quiet courtyard facing master bedroom on the second level with 2 additional west facing bedrooms. The storage and closets are ample. Full sized washer/dryer are conveniently tucked away in the units private mechanical closet. The turn of the century exposed factory brick and original wood beams and ceilings are just a few of the reasons this building has a cult like following. The pet friendly Ansonia Court is the anchor of the South Slope sitting 2 blocks from Prospect Park and close to all the areas favorite dining and shopping and transportation.

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed Common Area

Exterior Features

Building Courtyard Building Garden Garden

Building Information

Financial Details

Maintenance $1,554.5/mo
Original Price $1,850,000
Sale Price $1,640,000

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

112

Median Asking Price

$1.71M

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, 10:08 PM EST

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Location

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420 12TH Street #L1R, Park Slope, Kings County • Near 12th Street & 7th Avenue

Floor Plans

Floor Plan 1

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 $1,554.5 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 3 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 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: RLS10506038
First Listed: 9/26/2018
Closed: 2/21/2019
Contract Date: 9/26/2018

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 4/28/2026 at 2:08 AM UTC

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