For those who've been used to the timely launches, it might seem a little strange (or surprising) to see an October BTO launch. This time, HDB has launched 6,800 BTO flats across four key areas: Choa Chu Kang, Kallang/Whampoa, Queenstown, and Tengah. The best part? About 75 per cent of these homes are expected to be ready in four years.