you have not mentioned whether your father is alive or not . whether he died intestate or left a will . if he died intestate on his death you only have 1/5th share in property . for redevlopment of property you need consent of all legal heirs . if your sisters want house to be sold it is better to do so . sell the house give your sisters a share and then plan for purchasing another property with your share . in alternative you can buy out your sisters share