Oi Man Estate is a public housing estate in No. 12 Hill, Kowloon, Hong Kong. It is the largest public housing estate in Kowloon City District and has a total of 12 residential blocks which were completed between 1974 and 1975. It was officially opened by the Acting Governor Sir Denys Roberts on 20 November 1975.

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.