Poughkeepsie Zoning and Value Add

[Travis Hutchinson]

Hope all is well and everyone is safe and healthy.

I'm looking at an off-market multifamily property in the City of Poughkeepsie. 

The real value add in the property is that there is a large basement and attic, however, I don't know what the permitting laws are around adding apartments (without changing the external structure). I've done some search and figured out that its R-4, but I don't know how to determine what the city will and won't let me add - the basement (with windows) and attic spaces are quite large (over 2000 sq ft each) - could I get it to a 7 or 8 unit building? 

Is there anyone who has had experience with this or knows how I can find out more information? 

Thank you in advance