More HDB households but average size shrank, with fewer multi-generational families living together Toggle share menu Advertisement Chong Pang City HDB block. (Photo: Crispina Robert) 10 Feb 2021 03:02PM) Share this content Bookmark SINGAPORE: The number of Housing & Development Board (HDB) households has risen steadily over the years, with more than 1 million occupied flats in 2018. The average household size, however, shrank from 3.4 people in 2008 to 3.1 in 2018, as the proportion of households with two or more generations living together fell. Advertisement Advertisement These findings were released on Wednesday (Feb 10) in HDB’s Sample Household Survey, which is conducted once every five years to gather feedback about public housing and identify changing needs and expectations of residents.