Nestled on over 3 acres in Simi Valley's exclusive Big Sky community, this exceptional custom-built estate offers rare privacy, luxury finishes, and thoughtful design throughout. The single-story main residence features 4 spacious bedrooms and 5 bathrooms—including private en suite bathrooms for each bedroom, offering comfort and privacy for all. Each bedroom also features a custom walk-in closet and ceiling fan. Rich hardwood floors, vaulted ceilings, and crown molding elevate the living spaces, while the open-concept layout flows seamlessly from the formal dining room and butler's pantry to the expansive living room with a stacked-stone fireplace and tri-fold doors that open to the entertainer's backyard. The chef's kitchen includes high-end appliances, a walk-in pantry, farmhouse sink, oversized island, and custom cabinetry. A versatile bonus room with its own fireplace is perfect for a home office or guest space, and a well-appointed mudroom/laundry room includes built-ins and a sink. Outside, enjoy a sparkling pool and spa, a full vegetable and herb garden, and multiple producing fruit trees—all backing to open space with no rear neighbors. Above the detached 3-car garage is a beautifully upgraded 1-bedroom, 1-bath apartment with a full kitchen, in-unit laundry, A/C, tankless water heater, and sweeping views—ideal for guests, older kids, or rental income. With a convenient full bathroom inside the garage and over 3 acres that provide outstanding ADU potential, and with a location that feels tucked away yet is just minutes from shopping, dining, and freeway access, this is a rare opportunity to own one of Big Sky's most desirable custom homes.