Well we build recently ( in 2012) in islamabad,, the house is based on 1000 square foot , ( 4 marla) the total cost depends extensively on the quality of the materials used and the type of construction , we payed almost 35 lacs for complete buildup, and material used was of possible best quality according to that time and without wasting too much money on extra shashkas or decorations so for today keep estimate around 35-40,lacs