This spectacular showcase home, is located in the prestigious Happy Valley neighborhood, with easy access to BART, Highway 24, downtown Lafayette and award-winning schools. Uniquely positioned at the end of a quiet cul-de-sac and backing up to a 40+ acre private estate, the home features mature landscaping in a secluded, park like setting. Premier lot with plenty of off-street parking, a semi-circular driveway and garage space for three cars. Designed by architect Doug McQuillan, there are custom features throughout, with expert craftsmanship including beautiful woodwork, an 1, 100-bottle wine cellar, Waterworks bathrooms, whole house sound sytem, excercise room, four fireplaces and a built-in stone barbeque. Multiple large sliding glass doors open to stone patios and rock walls creating a free-flowing indoor-outdoor feel ideal for entertaining. Detached Au-pair / In-law unit / guest cottage. Home is occupied. Please do not disturb occupants.