Discover this striking architectural estate on 5 acres, designed by architect Nan Hearst. This stunning 3,600+/- sq. ft residence boasts a unique half-circle layout, perfectly oriented to showcase sweeping views of the Napa Valley. Inside, the home features three spacious bedrooms and two baths, complemented by expansive walls of glass that bring the outdoors in. Soaring ceilings, wood and concrete floors, and multiple fireplaces create an ambiance of warmth. The chef's kitchen is complete with a high-end gas range, a premium Sub-Zero refrigerator, and a scenic kitchen balcony. Outside, a sparkling pool with a dedicated outdoor-access bathroom offers a resort-like experience. Designed for sustainability, the property is equipped with solar power,Tesla Powerwall, backup generator, a 5,000-gallon water tank, a durable metal roof with fire sprinklers on the main home, a carport, and an on-site fire hydrant. The 1100+/- sq. ft. ADU offers 2 bedrooms & 2 baths, a partial kitchen, a cozy fireplace, a washer/dryer, and an attached garage. This space is perfect for guests or to generate rental income. This rare property is only a short 10-min. drive to Calistoga, & offers a perfect blend of luxury, sustainability, and unparalleled natural beauty-an exceptional opportunity in Napa Valley