A Rare Hilltop Jewel in Tustin Ranch Estates,Perched atop a private knoll in the ultra-exclusive, 24-hour guard-gated enclave of Tustin Ranch Estates, this iconic mansion is a hidden sanctuary where timeless elegance meets modern grandeur. Set on a 34,400 sq ft lot with over 9,273 sq ft of living space, the estate features 5 spacious bedrooms, 8 bathrooms, and a 4-car garage with an extended motor court for 10+ additional vehicles. Meticulously crafted with premium upgrades, the chefs kitchen is a culinary dreamequipped with custom German Miele appliances, separate Chinese and Western cooking areas, and tailored soft-close cabinetry with layered pull-out drawers. Four ovens, two oversized refrigerators, multiple cooktops, and three dishwashers offer power and elegance for everyday living and grand entertaining. The main level welcomes you with a refined in-law suite, formal home office, bright great room, and a flexible entertainment lounge that easily converts to a private theater. Resort-style features include an indoor resistance pool, sauna, and sunlit solarium with fireplace. Dual formal dining rooms and a wet bar elevate hosting possibilities. The fully integrated smart home system offers surround sound and Wi-Fi amplification indoors and out. Upstairs, the grand primary suite enjoys a private view balcony with sweeping mountain and city-light views. Three additional en-suites and a large secondary study provide flexible living for multi-generational needs or remote work. Three access pointsa grand spiral staircase, secondary stairs, and a private elevatorensure seaml