The big question for me is whether you still need a deposit based on 100% of the house value? I've had a few offers of mortgages that will easily cover the houses I'm looking at, but since I don't have a 15%+ deposit I can't buy anything. If I'm only buying 50% of the house, do banks treat this as a 50% LTV mortgage?
I would imagine that it would be of 50% (or whatever % you take). As the value to the mortgage company will only be what you are buying.