Basement and garage conversion to separate unit, please help me plan this!?!?

[Yashua James]

I am a real estate agent and investor.  I in the Atlanta area and I am now under contract for a house with a basement.  I plan on living in the basement and renting out upstairs.  While living down there I plan on converting it to another unit completely.  Currently the basement is finished with a bathroom but the space is arranged pretty weird.  There are no defined bedrooms and not many windows.  I plan on adding a kitchenette and I am strongly considering converting the connected garage to living space to add a bedroom with windows.  My questions are in Henry county in the Atlanta area, what laws, permits should I be considering before deciding to take on this endeavor?  Does anyone have any advice on how much a conversion like this may cost?  This is a 2 car garage.  It is in a single family neighborhood which I am sure is not zoned for multi-family.  Any information or shared experience would be greatly appreciated.  Thanks!

[Josh Bowser]

Hey @Yashua James - best advice here would be to find an experienced GC that does work in Henry county! They should be able to take care of all of the permitting. Permitting process will be cruicial to make sure your conversion is legal