Welcome to this spectacular, newly built 2025 side-by-side duplex located at One Manhasset Ave, ideally situated in the heart of Manhasset Isle. Each residence offers approximately 3,000 square feet of luxurious living space, featuring 4 generous bedrooms and 3.5 thoughtfully designed bathrooms. Breathtaking natural wood flooring flows throughout, leading you into a grand living room with soaring ceilings. A formal dining area with oversized windows provides the perfect setting for large gatherings, filling the space with abundant natural light. The chef's kitchen is beautifully appointed with modern finishes, high-end appliances, a natural gas range, quartz countertops, and ample storage-ideal for both everyday living and entertaining. The primary bedroom showcases expansive picture windows, custom California closets, and a beautifully designed en-suite bath. Three additional bedrooms-each generous in size-are conveniently served by a well-situated common bathroom. Nothing completes this meticulous home better than the massive finished basement, featuring a brand-new washer and dryer and direct egress to the large 2-car driveway. This level serves as the ultimate bonus space, perfect for a recreation room, home office, gym, media room, or any additional living area your lifestyle may require. Perfectly positioned in a serene residential setting, this home is within walking distance to shops, fine dining, a scenic estuary leading to the beach, the Manhasset Bay Marina, public transportation, and just 6 minutes from the LIRR-offering both tranquility and unbeatable convenience.