Is the property registered in your grand mother's name? Was it originally purchased by your grand father? If the property was purchased by your grand father then it belongs equally to all the four brothers after his death. Your uncle cannot assert to be the only owner of this property even if he has been paying the income tax regularly and the tax receipts are in his name. He cannot oust you from the house as it belongs equally to your father as well. Your father should file a case for division of property in the court to cull out his share therein. He may simultaneously seek a stay on the sale of the property by your uncle.