the other, or one beside the other. The latter arrangement is more specifically referred to as a semi-detached building. Many cities in the United States, Canada, and Australia have seen an increased push to allow duplexes in more zoning districts or even in all residential zoning districts. Renewed interest in supporting duplexes in many areas is part of a larger push to support missing middle housing types and related affordability, sustainability, and urban design goals. See also Polish flat Semi-detached Split-level home Triple-decker triplex Tyneside flat Apartment Condominium List of house types References House types