In Canada, public housing is usually a block of purpose-built subsidized housing operated by a government agency, often simply referred to as community housing, with easier-to-manage townhouses. Canada, especially Toronto, still maintains large high-rise clustered developments in working-class neighborhoods, a system that has fallen into disfavour in both the United States and the United Kingdom. However, Toronto Community Housing, the second largest public housing agency in North America, has a variety of buildings and communities ranging from individual houses to townhouse communities and mid-rise and high-rise apartments in both working-class and middle-class neighborhoods that house a significant number of low-income Canadians.