Two adjoining freehold residential sites in Upper Serangoon have been put up for sale. Marketing agent Colliers International says the indicative pricing for the sites at 1 Surin Avenue and 790 Upper Serangoon Road is about S$40 million. In a statement, Tang Wei Leng, executive director of investment services at Colliers International, said: "Indicative pricing is in the region of S$40 million. Including...