It is difficult to understand what legal question you are asking. Please appreciate that it is Forum for helping people with their legal problems. Your question does not appear to be relating to law but relating to valuation of property. Please consult some expert in that field or ask in some online forum which deals with such matters.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.