House Distribution

Dear Sirs , Please Help me on mentioned matter We are a hindu family & My Grandfather was purchase two house first house 30x85 & second house 15x45 ft on his name. His one wife i.e. my grandmother (A), four sons (BCDE) and two daughters both are married and settled at other cities (FG) is presenlty in our family. Now Son B live separately 15x45 ft second house. Son C live at 15x45 ft partition of first house front side Son D live at 15x45 ft partition of first house front side along with grandmother (A). Son E live at 30x40 ft partion of first house in back side portion. They all are mutually agreed to live at present locations with house size and front and back portion and till date no any dispute found. Both sisters(FG) does not want any property & agreed to sign for left her all claim in grandfather property. Grandfather was not generate any property WILL. after my grandfathers death we was changed/ update the name at nagam nigam from My grandfather to my grandmother with legal fomalities. Now please advise us 1. How to legally transfer the house ownership to each son with mutual understanding as they all are agreed. 2. Can my grandmother authorised to write a WILL as she is Successor due to her name registered at nagar nigam. And distribute their present house partitions with WILL. 3. Any other way to solve this 4. What are the charges will applicable.