Don't miss this amazing west-facing Davidon home with detached guest house in the highly desirable Old Ranch Summit I subdivision! This exceptional property features 5 bedrooms, 3.5 bathrooms, and a detached guest room/exercise studio, all situated on an expansive 13,158 sq. ft. hillside view lot with over $380,000 in upgrades. The gourmet kitchen is a chef's dream with granite countertops, rich cherry wood cabinetry, a 48 GE Monogram refrigerator, double ovens, microwave, 6-burner gas cooktop, wine cooler, walk-in pantry, and abundant counter space with breakfast bar seating. The luxurious primary suite offers a true retreat with two oversized walk-in closets, a Jacuzzi jetted tub, spacious shower, and dual vanities. Additional highlights include a huge bonus/theater room, plantation shutters throughout, a 7-zone sound system, and central vacuum system. Step outside to your resort-style backyard featuring picturesque hillside views, a sports court, and incredible outdoor living spaces perfect for entertaining and relaxation. Conveniently located with easy access to top-rated San Ramon schools, just 5 minutes to I-680 and 7 minutes to I-580 and BART. Welcome Home!