Searching for office space in Riverhead, NY? Prime Commercial has the space for your business. We’re conveniently located near the Long Island Expressway, providing easy access for employees and visitors traveling throughout Long Island. What's Nearby Located in the heart of Riverhead, our facility on Marcy Ave offers convenient access to a wide range of dining, retail, hospitality, and recreational amenities. The property is just minutes from downtown Riverhead, providing employees and visitors with an abundance of restaurants, cafés, and waterfront attractions. We’re close to Smith Haven Mall, one of Long Island’s premier shopping destinations featuring more than 130 outlet stores, restaurants, and services. With quick access to Route 58, NY-25, and the Long Island Expressway (I-495), our property provides connectivity to the North Fork, the Hamptons, and the broader Long Island market, making it an ideal location for professional office users seeking convenience and accessibility.