According to the Building Standards Act, in addition to those which are also classified as cooperative complex together with 'mansion,' there are those which are categorized as tenement even though they have 2 or more stories, and they are differentiated by whether or not a common corridor is required to construct within the building.
建築基準法上はマンションと同じ共同住宅に区分されるもののほか、２階建以上でも長屋住宅に区分されるものがあり、両者は共有通路の要否で異なる。