Demand for four- and five-room flats at Bidadari estate near Toa Payoh has already exceeded supply, just a day after HDB launched its biggest-ever sale of new units on Tuesday (Nov 17). Of the more than 12,400 flats on sale, more than 2,140 are at Bidadari. They range from two-room flexi to five-room units. According to data on HDB's website, the five-room units at Bidadari are already more than six...