In recent years, with the continuous rise of housing prices, Duplex (double-family villas) has become more and more popular in Australia. First, Duplex is cheaper than Free standing house. Second, compared with Townhouse, Duplex occupies a larger area, is more private, and holds more value. It is worth mentioning that some Duplexes have independent titles, which are not much different from independent houses. Due to the low development cost and short development cycle, double-family villas are very popular among ordinary investors and small developers.