What Is a Floor-Through Apartment, Anyway?

A floor-through apartment in a Cobble Hill brownstone. Photo by Brown Harris Stevens


    A floor-through apartment is not necessarily bigger or brighter than other types of dwellings, but it does offer some subtle but important advantages over apartments that occupy less than a full floor.

    Floor-Through Apartment

    A full house in Bed Stuy containing two floor-through units. Image by Bedford Brownstone Realty

    A quick definition

    A floor-through apartment is a unit that occupies the entire floor of a building. Some also refer to an apartment as a floor-through if it extends from the front of the building to the rear of the building, even if it does not occupy the full floor.

    Floor-Through Apartment

    A floor-through apartment in Park Slope. Photo by Brown Harris Stevens

    Some special features

    Floor-through units almost always have windows at least in both the front and the back, which allows for good air circulation.

    In floor-through apartments, “you have the ability to have some cross ventilation, which is the most important benefit,” cofounder of the Urban Pioneering Architecture architectural and interiors firm Jim Hill told Brownstoner.

    Noise control, the ability to put bedrooms in the back of a unit, and generally more layout flexibility are additional pluses to floor-throughs, he said.

    Floor Through Apartment

    A floor-through apartment is located at 831 Carroll Street in Park Slope. Photo by Christopher Bride for PropertyShark

    Other benefits include spacious hallways — not necessarily in the apartment itself, but in the common stairwell outside it.

    “Floor-throughs are especially nice when there is hall space that unofficially becomes a part of the home; a place for rain boots or scooters,” Douglas Elliman salesperson and brownstone-Brooklyn specialist Rita van Straten told Brownstoner.

    Where to find one

    Floor-through apartments are typically found in 19th-century townhouses and rowhouses, originally single-family, that have been cut up into multiple units. They are common in cities with these housing types, such as Brooklyn and San Francisco.

    The size and configuration of such townhouses lend themselves to being divvied up into one apartment per floor. Layouts vary according to the width and length of the building.

    Floor Through Apartment

    The floor plan for a floor-through in a condo at 9 College Place in Brooklyn Heights. Photo by Compass

    In Brooklyn, such buildings are typically about 20 feet wide and 45 feet long, with a floor-through apartment typically containing a bathroom, kitchen, living room and at least one-and-a-half bedrooms.

    Floor-through apartments can also be found in townhouses that were built originally as two-families and in three-family apartment buildings. The latter are common in areas that were built up around 1900, such as parts of Crown Heights, Bushwick, and Ridgewood, Queens.

    Floor Through Apartment

    A floor-through located on the second floor of a MacDonough Street rowhouse in Bed Stuy. Photo by Keller Williams

    In contrast, prewar apartment buildings typically have extremely large floor plates and many apartments per floor. In new condo buildings occupying a townhouse-size lot or two, it’s often the case that apartments occupy several partial floors.

    Areas rich in brownstones, limestones and other classic Brooklyn rowhouses often have a good number of floor-through units.

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