Renting in single family zone

[Tyco Bronye]

My basic question is, is zoning based on total people living in a house? or since I basically made it into a duplex will it not pass a certificate of occupancy if it's in a single family zone?

  I recently asked bp about a bunch of non pitted work I had did myself to my house.  I bought it with my brother 5 years ago and the first thing I did was make the walk out basement a separate living area(no permits).  We each lived in separate parts of the house for years.  I turned an unfinished area into a kitchen and bathroom.  The issue of zoning was brought to my attention by some bp users, that's something I never considered.  I am the only person who lives here now and I live in the basement unit that I made.  My plan was to only have one or at the most 2 renters occupy the upper floors.  That would only be 3 people living in this house, but I'm concerned I'll run into problems having the two kitchens, that somehow that will effect the zoning rules?  I'm trying to find out my best option at this point wither to get a certificate of occupancy or not.     What would you do in my situation? Thanks