HDB Upcoming BTO Launches - November 2017 in Punggol, Sengkang, Eunos (Geylang) & Tampines According to HDB, the next BTO launch is expected to take place in November 2017. Non-Mature Towns/ Estates: Punggol with 4 & 5 rooms 390 flats Sengkang with a larger mix 2, 3, 4, 5 & 3Gen with 1,500 flats Mature Towns/ Estates: Geylang (actually in Eunos) with 2, 3 & 4 with 740 flats Tampines with 2, 3, 4 & 5 rooms with the largest 2,200 units