An exceptional opportunity to create a substantial Hamptons estate just moments from Foster Memorial Beach. Set near the end of a quiet dead-end street off Long Beach Lane and surrounded by nature, this unique property offers plans for a 7,477 SF luxury residence featuring 6 bedrooms, 8 full bathrooms, and 2 half baths. A newly installed 6-bedroom I/A septic system, completed in 2026, provides significant value and future building potential. The proposed footprint allows for approximately 13.42% lot coverage within R10 Single Family Residential zoning. Plans have not yet been submitted, offering flexibility for the next owner to personalize or further refine the vision. The property currently includes a beautifully renovated 2-bedroom, 1.5-bath cottage with all new appliances and a strong rental history, allowing for immediate enjoyment or income generation while preparing for future construction. Located close to nature trails, bay beaches, and the heart of Sag Harbor Village, this is a rare opportunity to secure a prime Hamptons property with both immediate livability and exceptional long-term upside. Owner/agent