Founded in 1997, Islandia, New York-based NAI Long Island is an affiliate of the most well-recognized commercial real estate brand name in the United States – NAI Global. NAI Long Island provides commercial real estate and property management services throughout the Nassau/Suffolk area of Long Island, NY. The strategically located Long Island office is based in Islandia is positioned in the epicenter of commerce and industry on Long Island halfway from the western border of Nassau County to the Suffolk County Seat in Riverhead. We are immediately off the Long Island Expressway (Rte 495) at Exit 57.