The Home Ownership Scheme (HOS) is a subsidised-sale public housing programme managed by the Hong Kong Housing Authority. It was instituted in the late 1970s as part of the government policy for public housing with two aims – to encourage better-off tenants of rental flats to vacate those flats for re-allocation to families in greater housing need; and also to provide an opportunity for home ownership to families unable to afford to buy in the private sector.

Public housing in Hong Kong is a set of mass housing programmes through which the Government of Hong Kong provides affordable housing for lower-income residents. It is a major component of housing in Hong Kong, with nearly half of the population now residing in some form of public housing. The public housing policy dates to 1954, after a fire in Shek Kip Mei destroyed thousands of shanty homes and prompted the government to begin constructing homes for the poor.