The most extraordinary home ever to grace the Westlake Hills market. A masterpiece of modern design, this architectural icon combines jaw-dropping panoramic views of downtown Austin with unparalleled luxury and innovation. Newly completed by Paradisa Homes, this gated estate redefines what it means to live at the height of sophistication. Spanning nearly 11,000 square feet on almost an acre, The Onyx offers 7 bedrooms, 8 full and 3 half bathrooms, and cutting-edge features designed for those who demand the extraordinary. Walls of glass, including a custom Fleetwood Edge system--one of only two installations in the United States--frame every living space, offering uninterrupted vistas of Austin's skyline and surrounding natural beauty. The grand interiors feature 18-foot ceilings, sleek white oak floors, and an exquisite porcelain and marble fireplace, blending bold design with timeless elegance. At the heart of the home lies a gourmet kitchen that is nothing short of spectacular. Outfitted with Gaggenau appliances, a striking Milano marble island, and flawless designer finishes, it is a true culinary showpiece. A separate scullery, functioning as a second full kitchen with Thermador appliances, ensures effortless entertaining at any scale. Steps away, a glass-enclosed wine vault showcases up to 600 bottles, serving as both a functional centerpiece and a work of art. The owner's retreat is a world unto itself, spanning 2,300 square feet of indulgence. A private lounge with a double-sided fireplace, an elegant office with custom designer doors, and two expansive walk-in closets set the stage for luxury living. The spa-inspired bath features a natural stone soaking tub that retains heat, a rain shower, and breathtaking views--a sanctuary that rivals the world's finest resorts. Designed for entertaining on a grand scale, The Onyx offers a resort-style pool and spa, a cabana with a swim-up bar, and The Sky Parlor--a rooftop venue with panoramic views perfect for hosting unforgettable gatherings or quiet moments of reflection. Additional amenities include a state-of-the-art home theater, a fitness studio with a steam shower, and a serene library. A detached guest house ensures ultimate privacy for visitors, with a full kitchen, living space, and en-suite bedroom. For car enthusiasts, the estate boasts a 6-to-12-car garage with space for lifts, offering an impeccable display of design and functionality. With its unmatched views, rare architectural features, and world-class amenities, The Onyx of Austin isn't just a home--it's a statement. Welcome to The Onyx.