Property Name Transfer.

Hello Sir, THE CASE: The said property is in Aligarh, U.P . It is not an ancestral property. The registered owner of the property was my grandfather, who passed away 20 years ago. The mutation of the property was never done, hence the property is still in his name. He had no will. My grandmother died 5 years ago. Now my grandparents had 3 sons. One of which is my dad. Out of the three sons, one does not want the property at all. Hence the remaining interested parties are the two sons. The market value of the property is 20 Lakh Rupees. Question: 1. What is the procedure to transfer the property from my grandfather's name to the two interested sons ? How does the third son relinquish his right ? 2. What all documents would be required ? 3. How many days would the procedure take ? 4. What would be the total cost ? 5. Could you also kindly mention the aprox U.P stamp duty charges for the mutation of the property? (Since different States have different Stamp Duty Charges) Thank you.