Rare North Rancho Cucamonga foothill estate offering mountain views, privacy, and incredible versatility on an expansive 20,000+ sq. ft. lot. This unique property functions as a private compound featuring a 1,984 sq. ft. main residence with 3 bedrooms, 2 bathrooms, soaring ceilings, an Appalachian wood-burning fireplace, and an upgraded kitchen with custom cabinetry, granite countertops, a large island, and Viking 6-burner range. The property also includes a recently built permitted ADU (approx. 809 sq. ft.) with 2 bedrooms and 1 bathroom, plus a separate studio (approx. 482 sq. ft.) with kitchenette, bathroom, and basement storage area. Ideal for multi-generational living, guests, home office use, or potential rental income. Enjoy a gated courtyard designed for entertaining, complete with an outdoor BBQ kitchen, Jacuzzi with rock waterfall feature, decorative tile flooring, and custom ironwork. The backyard offers artificial turf, vineyard-inspired landscaping, mature plants, and plenty of outdoor space to enjoy. Additional features include a 3-car tandem garage, gated entry, and endless possibilities in one of Rancho Cucamonga's most desirable foothill locations. Recently improved pricing makes this a rare opportunity to own a truly flexible and unique property. Some photos have been virtually staged for illustrative purposes.