Tucked down a private, gated flag lot in the bustling hamlet of Hampton Bays, 3 Quail Run offers unparalleled seclusion and the quintessential Hamptons lifestyle. This sprawling, single-level estate spans a shy acre and features a 2,300-square-foot main residence alongside a brand-new, 557-square-foot legal accessory dwelling unit-a rare find that provides incredible flexibility for extended family or high-end rental income. The main house opens into a light-filled living room characterized by coffered ceilings and an airy, open-plan kitchen and dining area designed for effortless entertaining. Sliders lead to the first of the home's four private decks. A cozy den anchored by a high-efficiency EPA fireplace offers a quiet retreat with sliders to second deck enjoying views of the verdant backyard. A thoughtfully placed full bath and laundry area complete this wing of the home. Down the bedroom gallery, the primary suite serves as a true sanctuary, boasting an ensuite bath with a rain /body jet shower, and private deck #3 for morning coffee. Two additional guest bedrooms, a full bath, and a versatile bonus room-perfect for a home office or creative studio-provide ample space for all. For those seeking even more room, the sprawling, partially finished full basement features 7.5-foot ceilings throughout, a full bath, and heavy-duty infrastructure including two 500-gallon oil tanks, and plenty of storage. The detached apartment, completed in 2024, is finished with sophisticated custom quartz countertops, premium cabinetry, a walk-in shower, and its own washer/dryer. Climate-controlled by two split units and featuring a private balcony, this secondary home is a masterclass in modern design. The outdoor grounds are a resort-style oasis, fully protected by eight-foot deer fencing and centered around a 20x40 heated saltwater pool with a new 2022 liner. A massive 1,000-square-foot brick patio and a dramatic wood burning stove create the ultimate setting for summer evenings under the stars. This property is as smart as it is beautiful, featuring a new 2024 roof, fresh paint throughout, a two-car garage, as well as a nine-zone irrigation system and comprehensive CCTV security, every detail has been considered. Located just a stone's throw from the pristine West Landing Beach and the area's premier waterfront dining, 3 Quail Run is a hidden gem that perfectly balances the quiet of a private retreat with the vibrant energy of Hampton Bays.