Having separate entrances for each home, a duplex is a two-unit building. Duplexes are often owner-occupied, as opposed to apartment buildings, with one side being used as the principal house and the other side being rented out. An arrangement like this can have several advantages over other types of homes, like additional space and seclusion. Check out our selection of Modern Duplex House Design if you're looking for unusual home plans that provide these advantages.