Help with rezoning residential duplex into commercial property

[Qais Attarwala]

I have a duplex in Rosewood, Columbia SC and I spoke with the City of Columbia zoning to ask if I can add an additional unit to the property. They said that my parcel of land can hold a max of 3 units so I can either extend the current property into a triplex or add a free-standing unit to the land. However, they told me that I have to rezone my property as commercial and that I have to comply with a bunch of different regulations like updated landscaping, parking, etc. Has anyone else gone through this process of rezoning and can provide me with some links/guidance on the process? 

Thank you BP community!