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How should my brother and I structure our real estate purchase?
Because this question seems like it will stick around, I will flesh out my comments into an actual answer. I apologize if this does not answer your question as-asked, but I believe these are the real issues at stake. For the actual questions you have asked, I have paraphrased and bolded below: Firstly, don't do a real estate transaction without talking to a lawyer at some stage [note: a real estate broker is not a lawyer]. Secondly, as with all transactions with family, get everything in writing. Feelings get hurt when someone mis-remembers a deal and wants the terms to change in the future. Being cold and calculated now, by detailing all money in and out, will save you from losing a brother in the future. "Should my brother give me money as a down payment, and I finance the remainder with the bank?" If the bank is not aware that this is what is happening, this is fraud. Calling something a 'gift' when really it's a payment for part ownership of 'your' house is fraud. There does not seem to be any debate here (though I am not a lawyer). If the bank is aware that this is what is happening, then you might be able to do this. However, it is unlikely that the bank will allow you to take out a mortgage on a house which you will not fully own. By given your brother a share in the future value in the house, the bank might not be able to foreclose on the whole house without fighting the brother on it. Therefore they would want him on the mortgage. The fact that he can't get another mortgage means (a) The banks may be unwilling to allow him to be involved at all, and (b) it becomes even more critical to not commit fraud! You are effectively tricking the bank into thinking that you have the money for a down payment, and also that your brother is not involved! Now, to the actual question at hand - which I answer only for use on other transactions that do not meet the pitfalls listed above: This is an incredibly difficult question - What happens to your relationship with your brother when the value of the house goes down, and he wants to sell, but you want to stay living there? What about when the market changes and one of you feels that you're getting a raw deal?  You don't know where the housing market will go. As an investment that's maybe acceptable (because risk forms some of the basis of returns). But with you getting to live there and with him taking only the risk, that risk is maybe unfairly on him. He may not think so today while he's optimistic, but what about tomorrow if the market crashes? Whatever the terms of the agreement are, get them in writing, and preferably get them looked at by a lawyer. Consider all scenarios, like what if one of you wants to sell, does the other have the right to delay, or buy you out. Or what if one if you wants to buy the other out? etc etc etc. There are too many clauses to enumerate here, which is why you need to get a lawyer.