19 W Tiana Road Set beyond a gated driveway and surrounded by mature landscaping, this recently renovated residence offers over 10, 000 sq ft of interior living space across three levels; a scale rarely found in Hampton Bays waterfront homes. The property blends modern upgrades with direct water access, expansive outdoor living, and exceptional privacy, creating a setting well suited for multi-generational living, entertaining, or extended seasonal stays.The main level features a glass conservatory, chef's kitchen with Thermador appliances, a first-floor primary suite with access to the three-season deck, an additional en-suite bedroom, a third bedroom, powder room, and laundry. The second floor includes five bedrooms, highlighted by a secondary suite with two walk-in closets, an en-suite bath, and a private balcony overlooking the water. Two additional full bathrooms support flexible guest use. The lower level offers an 8-seat movie theater, arcade room, and storage areas designed for extended living. A separate two-level accessory apartment includes one bedroom and one bathroom; ideal for guests, live-in support, or potential rental income, adding versatility to the property's layout. Outdoor amenities include a gunite heated pool, hot tub, outdoor kitchen, and multiple lounge areas that create a seamless indoor-outdoor environment for dining and gathering. Waterfront features include a boat lift, direct canal access, and open water views from several vantage points. Additional features include a heated 5-car garage, solar panels, Tesla backup battery with dual chargers, and central vacuum. With its combination of interior scale, updated systems, extensive amenities, and waterfront access, this property represents a rare opportunity for expansive Hamptons living in a highly functional and well-connected setting.