Milwaukee - Duplex Conversion

[Chari Nash-Cannaday]

Hello BP,

I am in the process of purchasing a home in Milwaukee. The house use to be a duplex but was converted to a single family home. Does anyone know the process to convert it back to a duplex? I assume I need to apply for a permit but I'm not sure of the alterations that were made (what walls were originally in place or new wall that were built to convert it to single family). Has anyone gone through this process? Any info would be helpful. 

Thanks!