A duplex house is a two-unit apartment building or condominium, usually indistinguishable from a normal house on the exterior. Duplexes are especially common in the Northeastern United States and urban areas throughout the United States. Duplex can also refer to three- and four-unit buildings, the words triplex and quadruplex oftenest referring to movie theaters. The line between an apartment building and a duplex is therefore somewhat blurred, with apartment buildings tending to be bigger, while duplexes are usually the size of a normal house. A duplex apartment is a single dwelling unit spread over two floors connected by an indoor staircase. Building is either the act of creating an object assembled from more than one element, or the object itself; see also construction. ... Regional definitions vary from source to source. ... A typical megaplex (AMC Ontario Mills 30 in Ontario, California). ... An apartment building, block of flats or tenement is a multi-unit dwelling made up of several (generally four or more) apartments (US) or flats (UK). ... The focus, or focal point of a lens or parabolic mirror is the point onto which collimated light parallel to the axis is focused. ...
A duplex house is a two-unit apartmentbuilding or condominium, usually indistinguishable from a normal house on the exterior.
Duplexes are especially common in the Northeastern United States and urban areas throughout the United States.
The line between an apartmentbuilding and a duplex is therefore somewhat blurred, with apartmentbuildings tending to be bigger, while duplexes are usually the size of a normal house.