Experience an extraordinary opportunity to build a custom Texas Transitional estate on a premier 1.1-acre homesite in prestigious Southlake. This proposed luxury residence offers approximately 9,300 square feet featuring 5 bedrooms, 5 full baths, 3 half baths, a private elevator, and separate 2-car and 3-car garages, with the 3-car garage designed for optional vehicle lifts. A defining architectural feature is the exceptionally rare basement. A dramatic pool-integrated skylight creates a striking connection between the swimming pool and the lower level, filling the space with natural light and shimmering water views. The basement also includes a spacious game room with bar overlooking the pool and a private guest suite with courtyard views. The primary suite offers a fireplace, spa-inspired bath with soaking tub, sauna, outdoor shower, and separate his-and-hers walk-in closets. The main level features two living areas, a dedicated office overlooking the courtyard, a chef's kitchen, prep kitchen with pantry, and utility room. Upstairs, three spacious bedrooms are complemented by a flexible bonus room ideal as a media room, game room, lounge, fitness studio, or optional sixth bedroom. Designed for exceptional indoor-outdoor living, the backyard features a resort-style pool with integrated spa, expansive covered patio, and generous entertaining areas. Combining sophisticated architecture, flexible living spaces, and resort-style amenities, this proposed custom residence presents a rare opportunity in one of Southlake's most desirable locations. Architectural renderings are conceptual. Final plans, specifications, dimensions, features, and finishes are subject to builder modifications.