Multi-family housing is a type of housing where several residential units are located in one building. The most common form of multi-family housing is the apartment building. Multi-family housing serves a variety of lifestyle needs and income levels. It can often be more affordable, energy efficient, easier to maintain and more convenient in terms of location and transportation than single-family housing. The percentage of new housing starts in Surrey that are multi-family dwellings is a measure of the diversity of housing stock and choices in the city.