<prompt> Human: Im looking into buying a house, and bringing my current roommates with me to help pay the mortgage. We have already talked out the fact that they will have no ownership of the home and will basically be renting from me. Well, we found a house that a long time friends parents are selling, and they are willing to give me an excellent deal on it. That being said, its just slightly out of the range of what the bank can approve me for. I figured a possible solution would be to sign one of my roommates on as a co-borrower. I talked to my loan officer about it and she said it would certainly get us where we needed to be, and I could refinance down the line to remove them from the mortgage. Now, like I said, even with the agreement of being a co-borrower on the mortgage he has no interest in owning part of the home. He is putting his credit on the line to assist me, and down the line the house will belong to me. I trust this person, but is this dangerous? could he absolutely screw me somehow down the line? Am I taking on any serious liability?Thanks for any insight you can provide, I think I get this, but I could very well be missing something important.  <response>: Its a great idea if you want to destroy the friendship and wind up suing each other.Never buy a house with someone to whom you are not married. 