About NAI Long Island

NAI Long Island (NAI-LI) an affiliate of NAI Global. NAI-LI is a commercial real estate brokerage firm with tenant and ownership representation, consulting advisory services, land use/zoning expertise, valuation, REO-OREO-foreclosure services, litigation support/expert witness and property management functions backed by NAI Global, a worldwide leader in the commercial real estate services industry.

The strategically located 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. NAI is led by its three current Managing Principals; Lee Rosner, CCIM SIOR, Leo Farrell & Edward Pidgeon. They supervise a local staff of agents and administrative personnel. The office phone number is (631) 232-4400. The firm matches clients with commercial properties to accommodate expansion, relocation, and investment. Governmental agencies, corporate tenants, commercial landlords, and developers consult NAI-LI regularly for market reports and analysis. Moreover, the firm analyzes the performance of income-producing properties for investors and lending institutions.

NAI-LI enjoys a special understanding of Long Island’s office and industrial real estate market. It has sold or leased hundreds of office and industrial properties in the region. Active in both landlord representation and tenant representation, NAI-LI serves as a window on the availability of properties in the region’s commercial real estate market.

The firm is a Licensed Real Estate Broker in the State of New York. NAI negotiates leases on behalf of property owners as well as tenants and is regularly called upon to provide consulting advisory services on the marketing potential of diverse property types. Over the years, NAI-LI has sold many office buildings, industrial – warehouse flex buildings, retail properties, and land, emerging as one of the best-known commercial brokers on Long Island.

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About NAI Global

About NAI?

NAI Global is a leading global commercial real estate brokerage firm. NAI Global offices are leaders in their local markets and work in unison to provide clients with exceptional solutions to their commercial real estate needs – both locally and globally.  >>

Experienced Leadership

Our corporate leadership team aligns with the local offices under a shared strategic vision and plan that focuses on delivery of the highest quality service to our clients.  >>

Our Values

Our key values serve as a compass for our behavior and direct how we conduct our business and manage our relationships.  >>


NAI Global offers many opportunities for our clients, partners, and sponsors to participate in our internal and external events and activities.  >>

Rankings & Ratings

NAI Global and our local offices consistently rank in the top tier among the competition as measured for both local and global execution of commercial real estate service to clients.  >>