Move right into this designer-furnished, 2024-built residence-completely finished and "tooth brush" ready for immediate enjoyment. Set on a private .55 acre flag lot 240 feet off Accabonac Road, the home offers exceptional privacy while remaining just minutes from both East Hampton and Amagansett Villages, delivering the perfect balance of convenience and quiet retreat. "Builders own" 2024 contruction, 266 Accabonac blends classic Hamptons style with state of the art mechanicals and amentities. Structural insulated panel construction, trimless lighting and vents, shadow-gap details, and smart fixtures create a clean, modern aesthetic with superior energy efficiency and longevity. Every surface and system reflects custom-level quality rather than a standard spec approach. The outdoor setting is centered on an oversized saltwater gunite pool with an independent spa, surrounded by a generous blue-stone patio and mahogany decking. Separate pool and spa mechanicals housed in the detached two-car garage allow for extended seasonal use, even year-round spa enjoyment, all controlled through smart technology. Inside, the layout is bright, open, and made for modern living. A double-height entry leads to an expansive kitchen, dining, and living area anchored by a gas fireplace and walls of Pella windows. The main level includes a private en suite guest bedroom with its own entrance and a convenient cabana bath to the deck. Upstairs are three additional en suites, including a serene primary with a marble bath, double shower, and dual vanities, plus a full laundry room and easy access to a high-ceiling attic for exceptional storage. The finished lower level boasts abundant natural light with 9-foot ceilings and sliders opening to a sunken patio. Here you'll find a fifth en suite bedroom, a large recreation space, and a second laundry room (currently an office)-perfect for guests, media, or fitness. Designer furnished and truly move-in ready, this home offers custom-level craftsmanship, prime East Hampton location, and rare flag-lot privacy. A turnkey opportunity to step into the Hamptons lifestyle.