How do I confirm # of Units on a property

[Michael Krassos]

Hello all, I'm interested in a property that is advertised on the MLS as a 2-family in NJ. The basement is finished with a kitchen and separate entrance, which indicates to me a possible 3rd unit. I called the town who indicated property needed to be of a certain square footage and provide parking for 7 to be approved as a 3-family. I just got back my OPRA request where I requested the property tax record. On it is indicated a 3-family. Can anybody advise who I need to confirm this with? The property does not have parking for 7 cars, but I wonder if property can be grandfathered-in! Any advice on next steps appreciated.