Prime opportunity to purchase a two-story mixed-use building in the heart of Main Street, Riverhead. The first floor ±1,950 SF retail storefront is currently vacant and available for lease, offering strong visibility and a flexible layout suitable for a variety of retail or service-based uses. The second floor includes ±1,950 SF of office space, fully occupied by two tenants, providing stable income for an owner-user or investor. Positioned directly in front of Peconic Riverfront Park, the property offers alleyway access to the municipal parking lot and the waterfront, creating a unique blend of exposure and convenience. Ample street parking and nearby municipal options support steady customer and employee access. The location is just minutes from Old Country Road and Riverhead’s major shopping district, benefiting from consistent foot traffic and strong downtown activity. With its central location, adaptable floor plans, and proximity to key amenities, this property presents an exceptional opportunity for both owner-users and investors seeking a presence in one of Long Island’s most active downtown corridors. Ideal for end user/investor.