Converting a 3-unit building to a quad near OSU campus

[Sonam Gill]

I am closing on a 3-unit next week near OSU, and my inspector and contractor both advised of the option to divide the large first floor into two units, making the building a quad. Does anyone have experience doing this? Are there specific permits you need to pull for an appraiser/city to recognize the property as a quad? Specific specs that need to be included (separate metering, etc.) Generally trying to understand the process! Thanks!