Does fannie mae allow two addresses on one mortgage?

Not 100% sure what you mean. But I am guessing the property has two homes on it? In that case, no.

Much more info needed to answer your question, But i'm assuming your referring to two parcels, side by side, but you want 1 loan. So if this is the scenario, then the short answer is yes.. it is allowable.. but there are restrictions.. both lots must be adjoined, It cannot have another dwelling on it, Zoning must be exactly the same for both parcels, etc.. If you could provide the address, i'd be happy to advise you.. I'm a preferred Lender with California and Arizona being my primary markets. If you or someone you know is looking for financing options, feel free to contact me or pass along my information. 480-287-5714 WilliamAcres.com NMLS# 226347 / RPM Mortgage NMLS 1541014 / AZMB0121893