Welcome to a true architectural Luxury masterpiece in the heart of Fountain Valley. This rare 2026 custom-built estate offers two brand-new houses on a single lot, totaling over 4,500 SQFT of meticulously designed living space. Perfectly positioned in a premier school district, this smart-home sanctuary is just steps from the lush greens of Mile Square Park and local golf courses, while remaining minutes away from the cultural hub of Bolsas Phuoc Loc Tho and the iconic sands of Huntington Beach. With fully paid-off solar, separate addresses, and independent utilities for both units, this property defines modern luxury and multi-generational flexibility. The main residence is a showstopper, boasting Appx 3,760 SQFT of sophisticated design. Beyond the custom double-door entry, you are greeted by soaring ceilings, an electric fireplace, and a designer loggia that seamlessly blends indoor and outdoor living. The chefs kitchen is a culinary dream, featuring a waterfall granite island, Thermador professional appliances, and sleek white cabinetry extending to the ceiling. The main floor is thoughtfully laid out with a private office, a dedicated yoga room, and a guest bedroomeach featuring its own en-suite bathroomensuring every family member enjoys ultimate privacy and convenience. Upstairs, the home continues to impress with a massive loft family room designed for high-end entertainment. Two additional bedrooms and bathrooms accompany the palatial primary suite, which serves as a true sanctuary with its own private balcony overlooking the picturesque streetscape. The primary bat