RN-1 Zoning and multifamily conversion

[Warren Bryant]

I am under contract for a home in North Knoxville that is currently set up as a duplex (2b/1ba upstairs; 2bd/2ba downstairs). Given that I am zoned for RN-1, am I legally allowed to use this house as a duplex? Furthermore, there is a large 2 story garage on the property. Would I be allowed to convert that into units if I so chose. I have been looking at zoning regulations but I am having a hard time figuring out if I am allowed to convert existing structures into discrete units. The house has so much more upside if I could have a total of 4 units. Does anyone have any insight into this situation?