Neighbourhoods in Puerto Rico are often divided into three types: , (urbanisation) and (public housing). An is a type of housing where land is developed into lots, often by a private developer, and where single-family homes are built. More recently, non-single-family units, such as condominiums and townhouses are being built which also fall into this category. (In Puerto Rico, a condominium is a housing unit located in a high-rise building. It is popularly called an (English: 'apartment'), whether or not its resident owns the unit or lives it as a renter.) Public housing, on the other hand, are housing units built with government funding, primarily through programs of the US Department of Housing and Urban Development (HUD) and the US Department of Agriculture (USDA). These have traditionally consisted multi-family dwellings in housing complexes called a or a (and more recently a ), and where all exterior grounds consist of shared areas.