In Ireland and the United Kingdom, housing associations are private, non-profit making organisations that provide low-cost "social housing" for people in need of a home. Any budget surplus is used to maintain existing housing and to help finance new homes and it cannot be used for personal benefit of directors or shareholders. Although independent, they are regulated by the state and commonly receive public funding. They are now the United Kingdom's major providers of new housing for rent, while many also run shared ownership schemes to help those who cannot afford to buy a home outright.

Public housing in the United Kingdom, also known as council housing or social housing, provided the majority of rented accommodation until 2011 when the number of households in private rental housing surpassed the number in social housing. Dwellings built for public or social housing use are built by or for local authorities and known as council houses. Since the 1980s non-profit housing associations became more important and subsequently the term "social housing" became widely used, as technically council housing only refers to housing owned by a local authority, though the terms are largely used interchangeably.