$15,900,000

Property Overview

Newly completed in 2025, The Onyx stands as an architectural masterpiece perched above Westlake Hills, commanding sweeping views of downtown Austin and the Hill Country beyond. This 10,912-square-foot estate spans nearly an acre of meticulously designed grounds, accessed through a private gated entrance that immediately conveys the exceptional level of privacy and security afforded here. Built by Paradisa Homes with uncompromising attention to proportion and enduring quality, the residence features soaring interior volumes with ceilings reaching 18 feet, flooded throughout with natural light via a custom Fleetwood Edge sliding glass system—the largest of its kind in residential application.

The 7-bedroom, 11-bath home showcases a thoughtfully orchestrated floor plan anchored by a 12-foot Milano marble kitchen island paired with Gaggenau appliances and a fully equipped catering kitchen. Walls of glass frame living spaces that transition seamlessly to terraces overlooking the Hill Country landscape, while the rare elevation and architectural presence deliver the scale and distinction rarely achieved in luxury residential construction. Located in prestigious Westlake Hills within Eanes ISD, this property represents the pinnacle of new luxury construction in Austin's most coveted lakeside neighborhood.

Vox Residential Insight

The Onyx's 81 percent price per square foot premium over the Westlake Hills median reflects the convergence of new construction quality, extraordinary views, and true scarcity in this neighborhood. At Vox Residential, we recognize that homes of this caliber—with architectural distinction, unobstructed vistas, and execution at this level—define the luxury market in Austin, and this fresh listing commands immediate attention from discerning buyers.

Agent Description

Newly completed, The Onyx is among the most significant residential offerings ever brought to market in Westlake Hills. Defined by rare elevation, sweeping downtown Austin views, and exceptional execution, this architectural estate delivers scale, presence, and privacy at a level few homes achieve. A secure, gated, and privately walled arrival sets the tone for the residence. Spanning approximately 11,000 square feet on nearly an acre, the home was built by Paradisa Homes with an uncompromising focus on proportion, durability, and enduring quality. Walls of glass frame the living environment throughout, including a custom Fleetwood Edge sliding system—the largest of its kind—opening to uninterrupted city and Hill Country views. Interior volumes are striking, with ceilings reaching up to 18 feet and light moving intentionally throughout the day. The kitchen is anchored by a 12-foot Milano marble island with Gaggenau appliances, complemented by a fully equipped catering kitchen with Thermador appliances and a glass-enclosed wine vault with approximately 600-bottle capacity. An entire level is dedicated to the owner’s suite, featuring a private lounge, office, dual walk-in closets, safe room, and a spa-like bath with soaking tub, oversized rain shower, and floor-to-ceiling glass framing downtown views. Additional amenities include a private theater, fitness studio with steam shower, library, full bar opening to the pool, elevator, and a fourth-floor Sky Parlor designed for indoor-outdoor entertaining. Outdoor living includes a resort-style pool and spa, cabana with swim-up bar, outdoor kitchen, pool bath, and expansive lawns. A detached guest house offers a kitchen, living space, and en-suite bedroom. Garage parking accommodates 6–12 vehicles with lift capability. Located in Eanes ISD and minutes from downtown Austin.

Neighborhood: Westlake Hills

This property is located in Westlake Hills, Austin, TX. The area is known for Eanes ISD Schools, Lake Austin Views, Luxury Estates, Hill Country Setting, Premier Address.

At $1457/sqft, this listing is priced 84% above the Westlake Hills median of $794/sqft.

Property Details

Listing data last updated: July 16, 2026

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