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Ansonia Court is a prewar cooperative built in 1881 with a private courtyard, doorman, and amenities like package room and bike storage. Located in South Slope, it's close to Prospect Park, Union Market, local dining, and the F/G trains at 7th Avenue.
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.
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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.
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