Requesting provision to construct staircase

Dear Sir, My father expired in 1987. I have three sisters (two youger and one elder) and two elder brothers. we constructed our father's old house in 2004. At that time First elder brother said me and my second elder brother to take the house. So we constructed the house in such a way that ground floor for second brother and first floor for me. We constructed the staircase on the rightside of the house. The only way to go the backside of the house is through the house .The staircase blocks the narrow lane beside the house. In 2009 we started partition. At that time First brother asked share in the house. So we decided to give the empty land on the backside of the house. To acces his portion I have to remove the staircase. Now the problem is one shop was constructed before the house . The rent is taken by the second brother as he is taking care of mother. Now the suitable place to construct the staircase to go to my portion(first floor) is the location where shop was constructed. I am asking my second brother to remove the shop .But he is not willing to do. How can I solve this problem. Thanks