PS - it may be that if he wants to stay in the house, your brother can give you half the value in cash - it's a bit like someone wanting to stay in a house after a divorce, the one who wants to stay has to buy out the other one. There are people on AB who can hopefully give you better legal perspectives than I can - but I can't say enough, you need legal advice, if it has to be contested then you need someone who understands all the aspects of this to be working for you on it.