Dividing Address on Property

[Kady Daniels]

Hi There! My husband and I are about to close on our first property. The seller has been working with the city to get a Certificate of Occupancy (was a single home, she divided into two units). I can't seem to get a definite answer from anyone. How would we update the address to add an A/B or unit 1/2 etc. onto the two units now? Is that process included in the CO? or Do we just need to go down to the Post Office? 

Thank you in advance for your help! & let me know if you need more information.

[Jeff Robert]

Addresses are entirely controlled by the post office, it has no relation to a taxable property. I've owned single parcels with two mailing addresses on the property as well as multiple parcels that shared a single address.