That's a very broad question. I guess I don't even know where to start answering it.... Are you trying to find out information on a specific multi-family conversion? Are you asking about the process you need to go through to legally convert a multi family? I am converting a Cambridge Multifamily right now, and would be happy to help you out. Please specify or feel free to contact me directly firstname.lastname@example.org I'd be happy to answer whatever I can.