HDB resale 4-roomed flat in Pasir Ris

My friend bought this 25 year old HDB flat at Paris Ris for $450,000 recently. He paid another $150,000 to fully renovated the flat. The renovation came with the kitchen,living room and bedroom appliances. Although known as a 4-roomed flat,it actaully has 3 bedrooms. There is an elevator on every floor of the 10 storey building. Unlike most HDB flat,this place has only 2 units on every floor. The total area is about 1,100 sq ft.