Short Sale 2 Flat with Basement Unit

[Lorenzo Perez]

Hello All,

I am in the process of buying a 2 flat in Brighton Park on the same block i grew up on. As long as I could remember this building has had a basement unit that has always been occupied in addition to the 2 above ground units (25 +years). How can i determine if this basement unit is legal? or if it has grandfathered in from previous zoning ordinances, currently the entire neighborhood is zoned for RS-3. If this is any help, the basement unit has always had 2 points for egress. Any help would greatly appreciated, I am having trouble finding information online. 

Thanks,

Lorenzo