Partition of Undivided House Between Brothers

Sir / Madam I my self and my brother hars built an equal squre feet area double store building with separate kitchens, on a heriditorily land handed over and jointly owned by me and my brother. I have invested 90 percent of the expenditure incurred for the construction of the above double storried building. Am unmarried and he is married and have children. He is a nice person. But I want to prepare an apt Deed that fix unquestionable sole, single ownership and transfer right to both of us on the particular floors. Sir How should I prepare such an apt Document ensuring full legal protection to me especially I am single unmarried co-owner and wish to secure my future life with out any legal issues