Nearly 3 in 10 Singaporeans own more than one house
https://sbr.com.sg/residential-property/news/nearly-3-in-10-singaporeans-own-more-one-house
About 3% of HDB flat owners own at least 1 private property
https://www.channelnewsasia.com/singapore/hdb-flat-owners-private-properties-rent-absd-cooling-measures-desmond-lee-3049851
About 59,000 own two (and) 20,000 own three to ten private residential properties,”
https://www.propertyguru.com.sg/property-management-news/2018/2/168947/20000-people-own-3-to-10-private-homes-in-spore-ministry#:~:text=%E2%80%9CAbout%20381%2C000%20Singapore%20citizens%2C%20permanent,properties%2C%E2%80%9D%20replied%20the%20Ministry.