An apartment or flat is a self-contained housing unit (a type of residential real estate) that occupies only part of a building, generally on a single storey. There are many names for these overall buildings, see below. The housing tenure of apartments also varies considerably, from large-scale public housing, to owner occupancy within what is legally a condominium, to tenants renting from a private landlord
Condominium
A condominium, often shortened to condo in the United States and in most Canadian provinces, is a type of living space similar to an apartment but independently sellable and therefore regarded as real estate.
