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At 450 West 20th Street, a four story Anglo Italianate townhouse houses a small co op on Chelsea’s Seminary Block. Dating to 1910 in the building record, it retains a rusticated brownstone base, an arched entry, and a cornice with a honeycomb frieze. The address faces the General Theological Seminary and sits on a tree lined block of historic townhouses.
The apartments are generally floor through one bedroom homes, with high ceilings, original wood floors, fireplaces, and garden or treetop outlooks recurring across the layouts. French windows, bay windows, skylights, and south facing exposures appear in the residences, while garden level arrangements introduce direct access to planted outdoor space. The building’s residential program also includes a top floor layout with exclusive roof rights and the possibility of connecting parlor and garden levels into a duplex, giving the townhouse a broader range of spatial arrangements than its compact scale suggests.
The co op is self managed, maintained without an underlying mortgage, and has reasonable board requirements; pets are permitted. Its setting places the building close to the High Line, Chelsea Piers, Hudson River Park, Clement Clarke Moore Park, Chelsea Market, and more than 200 galleries. The Meatpacking District, Little Island, Hudson Yards, and the restaurants and shops of West Chelsea are also within the surrounding area.
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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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