What do you mean by "It was purchased in heirs grand father name then it was transfer to father and then to heir on father's death"?
Please post simple facts; try to avoid assumptions are presumptions.
Please note that an ancestral property is a property acquired by one's great grandfather which has been passed down from generation to generation (grandfather and father) up to the present generation without being divided or partitioned. The concept of ancestral property is restricted Hindus. It is of no application in the case of Christians and Muslims.