Discover an unparalleled sanctuary where ancient craftsmanship meets modern off-grid luxury, locally known as the Cob Mahal! This 81-acre estate is a masterwork of eco-conscious design, featuring an earthen eco-home, meticulously hand-sculpted from cob (monolithic adobe) and straw bale. The approx two-foot-thick walls combined with the substantial thermal mass with high-efficiency insulation combine to create a seamless passive solar experience. The result is a home that maintains a comfortable temperature year-round along with the wood burning fireplace & stays naturally cool in the summer. Oriented due south, the home is bathed in natural light through expansive glazing, highlighting interior walls finished in white kaolin clay plaster and a traditional poured adobe floor downstairs. At its heart, a massive Douglas fir timber frame milled on-site showcases authentic mortise and tenon joinery, rising to hand-finished ceilings. The property is a true wellness retreat, designed for those seeking a private haven. The home & land border a spiritual, intentional community based on yoga & meditation.The three large custom Damanhurian stone spirals, built by artisans from Northern Italy serve as powerful tools for meditation and energetic alignment. The earthen sweat lodge is a sacred space for detoxification and spiritual renewal, perfectly integrated into the natural landscape. Mountain vistas & breathtaking views of snow-capped Sierra peaks provide a dramatic backdrop to your 81-acre private forest. Off-Grid Mastery: A robust solar system installed by the experts at California Solar in Grass Valley ensures a sophisticated, self-sustaining lifestyle. The well has 20K gallons of water storage. Heritage Materials: The structure is topped with a metal roof and premium Vermont green slate siding on the dormers, built to endure for centuries.Fenced garden & orchard and a detached art studio close to the home. Located close to the majestic Yuba River, a short drive to historic downtown Nevada City and endless recreation in the Tahoe National forest. Minutes to Mother Truckers for convenient shopping.This property transcends traditional luxury; it is a legacy estate for the discerning buyer who values non-toxic living, artistic expression, and a deep connection to the Earth. Whether used as a world-class retreat center or a private family sanctuary, this home represents the pinnacle of sustainable luxury & beauty.