What is the total number of HDB 5-room and 4-room flats available in Singapore?

The total number of HDB four-room and five-room flats in Singapore is estimated at around 510,000 for four-room flats and about 250,000 for five-room flats. These figures are derived from HDB’s public housing statistics and reflect the current distribution of flat types based on the overall stock of over 1 million HDB flats islandwide. The exact number may vary slightly due to ongoing BTO launches and redevelopment, but four-room flats consistently make up the largest proportion among HDB units, followed by five-room flats. Four-room flats constitute roughly half of all HDB flats, while five-room flats typically account for about a quarter. For further breakdowns and up-to-date information on block, town, or estate levels, you can use EdgeProp Singapore’s tools for detailed HDB data.