The ideal size for a 3-bedroom rental unit in Singapore ranges from 900 to 1,500 square feet. Newer condo developments often feature units around 900 to 1,100 square feet, suitable for central locations, while larger units (1,200 to 1,500 sq ft) tend to attract higher rents in premium districts and are preferred by families. Units around 1,000 to 1,200 sq ft balance space and maintenance, appealing to a broad tenant base.