The Singapore Improvement Trust was founded to oversee the construction of public housing in Singapore, where more than three quarters of residents live.

The Singapore Improvement Trust (SIT) is a former government organisation that was responsible for urban planning and urban renewal in Singapore. Formally established in 1927 under the Singapore Improvement Ordinance, it was modelled after similar organisations in India. The SIT initially carried out back lane improvement schemes and marking out unsanitary buildings for demolition, but began constructing public housing from 1935. After 1945, the SIT initially focused its efforts on the repair of its residential developments. It resumed constructing public housing in 1947 but was unable to keep up with demand. The SIT was also involved in the development of a "Master Plan", which set out Singapore's developmental direction, from 1952 to 1958. In the late 1950s, plans were set out to replace the SIT with two departments—housing and planning—culminating in two bills that were passed in 1959. With the establishment of the successor organisations by the government of Singapore, the Housing and Development Authority and the Planning Authority, in 1960, the SIT was dissolved.

Public housing in Singapore is subsidised, built, and managed by the government of Singapore. Starting in the 1930s, the country's first public housing was built by the Singapore Improvement Trust (SIT) in a similar fashion to contemporaneous British public housing projects, and housing for the resettlement of squatters was built from the late 1950s. In the 1960s under the SIT's successor, the Housing and Development Board (HDB), public housing consisting of small units with basic amenities was constructed as quickly and cheaply as possible at high densities and used for resettlement schemes. From the late 1960s, housing programmes focused more on quality, public housing was built in new towns, and a scheme allowing residents to lease their flats was introduced. Throughout the 1970s and 1980s, more public housing options were provided for the middle class and efforts to increase community cohesion within housing estates were made. From the 1990s, the government began portraying public housing as an asset, introducing large-scale upgrading schemes and loosening regulations on the resale of public housing while additional housing programmes for the sandwich classes and elderly residents were introduced. Rising housing prices led to public housing being seen as an investment from the 2000s, and new technologies and eco-friendly features were incorporated into housing estates.