Introducing 23 Spring Road, an architecturally significant estate designed by the renowned architect Henry Hill. Set on 2+ acres, this gated estate features stunning views of Mt. Tam, and includes a 4 bed/4.5 bath main house, 1 bed/1 bath guest cottage (5,024 sq ft total),and a gym. The current owners undertook a significant renovation using the finest materials and finishes. Featuring an open layout that integrates indoor-outdoor living, Fleetwood sliding glass doors and Milgard windows enhance the connection to the inviting outdoors. The new designer kitchen boasts Calacatta marble countertops and center island, high-end Miele appliances, dual dishwashers, butler's and 2nd pantry. The living room, dining room, and sun room all feature views of Mt.Tam through Fleetwood doors. The main level includes an en-suite bedroom. Upstairs is the primary suite with spa-like bath, massive walk-in closet & private deck, two additional en-suite bedrooms, and laundry room. A detached guest cottage with private patio and a fully equipped gym adds flexibility to this exquisite property. Vibrant landscaping, citrus trees, majestic Oaks, a beautiful rose garden, an inviting swimming pool, and meandering paths offer a deep connection to nature. Close to trails & Kentfield Schools.