After day one of HDB’s BTO November 2021 launch, 4-room flats at Rochor’s River Peaks I and II have registered an application rate of 4.6. That’s 3,158 applicants for 680 4-room flats (so far). Second-timers form a bulk of it – at 49.3 times – compared to 2.3 times for first-timers. For the 3-room flats, there are 356 applicants for.