• Since its establishment in 1960, HDB has been responsible for building affordable and good-quality public housing.
• HDB flats are categorised according to the number of rooms in the flat, with the living room counting as one room.
• From 1960 to 1965, about 30% of public housing flats were 3-room flats. At that time, public flats were only for rent. The monthly rent for 3-room flats was $60.
• Currently, 3-room flats can be bought from HDB or on the open market.
• According to the Census of Population in 2020, 17.7% of Singaporeans live in 3-room flats. The floor area of a 3-room flat is typically about 66 square metres. In
  addition to two bedrooms and a living room, there is also a kitchen, a bomb shelter, and two bathrooms. The larger of the two bedrooms is the master bedroom, which has an en-suite bathroom.
• In 1989, HDB decided to cease building 3-room flats in order to sell all of the approximately 8,000 remaining units. In 2004, it relaunched 3-room flats with 156 units in Sengkang West, with prices ranging from S$80,000 to S$110,000.

The first batch of 3-room flats launched by HDB in 19 years was enthusiastically received by the public, with the number of applicants double that of the number of flats available. (Lianhe Zaobao, 20/9/2004)