There is no birth right for you in this property. You may have taken birth in this property or residing in the same place since your birth but you will not have any right over the property if it was the self acquired property of your grandfather. Your grandfather is alive and he has driven away his own son then where is the right for the grandson in the property. Dont be misguided that a grandson will automatically have share in the grandfather's self acquired property.
You will have right as a coparcener in the ancestral property but this is not ancestral property. If you have no other residence and if you are minor, it becomes the duty of your father to maintain you until you attain the age of majority and after that you have o maintain yourself by anyway you may choose.
Hence dont go by anyone's misguidance and lose your hard earned money in the name of claiming your rights, legally you cannot hold a ground this way.