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Ansonia Court, 420 12th Street - Park Slope, Brooklyn
Ansonia Court, 420 12th Street - Park Slope, Brooklyn
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420 12th Street

Ansonia Court,
420 12th Street

Co-op located in Park Slope, between Seventh Avenue & Eighth Avenue  Map

  • Apartments For Sale (3)
  • Recent Sales (11)
  • All Units in Building (70)
Unit #
Beds
Baths
Size
Price / Ft2
Price
Listed on
Days on Market
Unit #
Beds
Baths
Size
Closing Price
Price / Ft2
Asking Price
Sold on
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Overview of Ansonia Court at 420 12th Street

The Ansonia Court at 420 12th Street in South Slope, Brooklyn began its life as the Ansonia Clock Company factory in 1881. Designed by Samuel Curtiss Jr. in the German Romanesque Revival style, the building has a rich history connected to Anson Green Phelps, who founded the Ansonia Clock Company in 1844. The company, known for its figurine and novelty clocks, operated from this location until the 1920s before eventually selling its business to a Soviet trading company.

The building spans a full city block with additional addresses at 393-407 13th Street and 392-405 7th Avenue. Its most distinctive architectural feature is the European-style interior courtyard, designed by landscape architects Zion & Breen, which spans one-third acre and includes a lawn, fountain, benches, and mature trees.

In 1982, architects Hurley & Farinella converted the industrial structure into 70 cooperative apartments. The conversion preserved much of the building's original industrial character, including exposed brick walls, high wooden beam ceilings reaching up to 11 feet, and large factory-style windows.

Today's units range from one-bedroom to three-bedroom configurations, with many featuring duplex layouts. The building maintains its historic charm while offering modern amenities including a full-time superintendent, doorman service, package room, and bicycle storage. The pet-friendly complex is situated one block from Prospect Park and three blocks from the F/G subway lines.

The building's authentic loft characteristics include original timber beams, exposed brick walls, and oversized windows that fill the spaces with natural light. Many apartments feature modern updates while preserving the industrial aesthetic, with some units including private outdoor spaces.

Year Built
1881
Converted: 1982
Apartments
70
Floors
4
Pets: Allowed
Neighborhood
Min Down
20%
70Apartments
View All Past
Sales & Rentals
in Building

Amenities

  • Pre War
  • Walk Up
  • Resident Storage
  • Garden
  • Intercom
  • Rooftop Terrace
  • Mail Room
  • Courtyard
  • Bike Room

Shh... Many units sell without being publicly listed.

Interested in off-market listings at Ansonia Court? Some previously listed residences might be available – contact us for insider details on potential opportunities!

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Nearby Subways

  1. F
at 7th Ave and 9th 0.18 miles

Carter’s Review

"The Ansonia Court is a four-story, red-brick building at 420 12th Street in the Park Slope section of Brooklyn.  It once housed the Ansonia Clock company. 

The building has 70 cooperative apartments. "
Read Full Review

Pros & Cons

  • Former Ansonia Clock factory building
  • Some balconies
  • Roof decks
  • 11-foot wooden beam ceilings
  • Brick wall interiors
  • Walk-up- red-brick buildings
  • Three blocks to F/G trains at 9th Street
  • Centrally located in desirable Park Slope neighborhood
  • Two blocks from Prospect Park
  • 1/3 acre European-style courtyard with fountain, lawn, and mature trees
  • Pet-friendly building
  • Full-time superintendent
  • Package room and bicycle/stroller storage
  • In-unit washer/dryers available
  • Original industrial architectural details preserved
  • 70 cooperative units
  • No garage
  • No health club
  • Walk-up building (no elevator)
  • Board approval required for co-purchasing and pied-à-terre arrangements

CityRealty Rating

23
/44
Architecture
+
26
/36
Location
+
14
/39
Features
+
8
Editor’s Points
=
71
CITYREALTY
RATING
  • How is the CityRealty Rating calculated?

    Architecture
    • 30+ remarkable
    • 20-29 distinguished
    • 11-19 average
    • < 11 below average
    Location
    • 27+ remarkable
    • 18-26 distinguished
    • 9-17 average
    • < 9 below average
    Features
    • 22+ remarkable
    • 16-21 distinguished
    • 9-15 average
    • < 9 below average

Sales History

Price/Room (Est)

Why are we displaying the estimated price per room?

For some co-ops, instead of price per square foot, we use an estimate of the number of rooms for each sold apartment to chart price changes over time. This is because many co-op listings do not include square footage information, and this makes it challenging to calculate accurate square-foot averages.

By displaying the price per estimated room count, we are able to provide a more reliable and consistent metric for comparing sales in the building. While we hope that this gives you a clearer sense of price trends in the building, all data should be independently verified. All data provided are only estimates and should not be used to make any purchase or sale decision.

Price/Ft2 (Est)
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Sales History by Apartment Size

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