Going Condo in upstate NY

[Kate B.]

I own a five unit building -- 2 brick buildings, side by side.   It's in upstate NY.

I am thinking about selling it as condos.  I am thinking about joining two apartments on one side as one unit (two floors).  There is a street level apartment in the same building, with three bedrooms that I'd sell separately.   Next door, there are two apartments, one with 2 bedrooms and the top floor with one bedroom, that I'd sell separately.

I can't find a lot on this site about creating condos before sale.   Five units would become four.

Is there anything I should know or watch out for or consider?

Thank you!

Kate