Multifamily residential, also known as multidwelling unit (MDU), is a classification of housing where multiple separate housing units for residential inhabitants are contained within one building or several buildings within one complex.
Common forms include apartment building and condominium, where typically the units are owned individually rather than leased from a single building owner.
Many intentional communities incorporate multifamily residences, such as in cohousing projects.
[3] Multifamily housing has beneficial fiscal externalities, as their presence reduces property tax rates in the community.
[3] Before the Industrial Revolution, such examples were rare, existing only in historical urban centers.