Share of land

Dear sir, My grand father had 3 sons and a daughter. Eldest son of him is my father. My father built a pucca house where my grand father used to stay. The land is very old( from my great grand father, so about land paper, i don't know much about that) My grand father and grand mother died. Also my mother and father are no more. We are 2 brothers and 4 sisters. My two uncle (chacha), one is staying in Mumbai and other one is staying in village(not where my father built the house but at far away with his family). I am staying in mumbai with my brother and sister we are all working for livelihood. The house which my father built is vacant no one live there. The problem is that my younger uncle threat me, that he will sell the house,but i too want to sell but by getting reasonable amount which we can distribute between family share holders. Is it possible that he can alone sell the the house without our consent, if he does, what should i do Plz help me sir My email id : [deleted]