According to the Department of Buildings it is a legal two family. If you click on this link it will take you to the Department of Buildings property overview, once there you can click on the certificate of occupancy link to see the actual c/o:
If I can be of further assistance please let me know. Good luck!
Mitchell S. Feldman
Associate Broker/ Director of Sales
Madison Estates & Properties, Inc.
Office: (718) 645-1665/ Cell: (917) 805-0783