A Modern Farmhouse on Nearly 13 Idyllic Acres. Welcome to understated elegance on 12.82 acres in Castro Valley, including 6 acres of fenced pastures. This estate blends modern luxury with timeless farm charm. Designed by Malcolm Davis Architecture, the fire-resistant barn was built for 15 collectible cars but offers endless possibilities—storage, livestock, horses or a brewery-ready garage. The nearly new modern farmhouse, built with fire-resistant materials, Hardieboard, and shearwalled siding, features soaring ceilings, porcelain tile floors, and custom cabinetry by Bruce Gordon. Accordion doors connect the open living and dining areas to a deck with serene views, creating seamless indoor-outdoor flow. The home offers 2 bedrooms plus an office that could serve as a 3rd bedroom, with a spacious laundry/mudroom leading to the rear deck. Drought-resistant landscaping, dry-farmed almond trees, mature plum trees, and a stone patio draped in climbing roses enhance the grounds. A hot tub offers a peaceful escape, and three 5,000-gallon water tanks ensure ample supply. Nearly all major systems—electrical, plumbing, furnace, are under five yrs new. Septic up to current standards. Easy Hwy 580 access, Estate offers privacy and convenience. Experience this one-of-a-kind modern farmstead.