Davidson County SFH to MFH Re-zoning

[Austin Haney]

I am considering purchasing an off market deal that is zoned in Davidson County as RS7.5. The home was originally a SFH but the owners built a 2bed 2 bath unit off of the back of it but have never converted the property into a duplex.

The neighbors have done the same thing but they converted their SFH into a MFH back in 1989 when the zoning was R6.

Is it possible for me to convert this property into a MFH since it is now R7.5 or would I face some major issues on it. 

Thanks in advance!