Triple-deckers are a type of residential building commonly found in certain East Coast cities in the United States. Synonyms for this style of housing include three-deckers, triple-flats, and triple-deck homes. In some regions, they may also be called three-deck tenements or triple-deck apartment buildings. The buildings feature three separate apartments stacked on top of each other, with one unit on each floor. Typically, each apartment has the same floor plan and layout, consisting of a living room, kitchen, bathroom, and multiple bedrooms. These buildings were originally constructed for working-class families, providing affordable housing options in urban areas.