Welcome to 10515 La Costa Drive, an exceptional 2-story residence offering 5,132 square feet of luxury living, thoughtfully situated on a sprawling 0.398-acre lot backing directly to the 17th hole of the prestigious Onion Creek Golf Course. Boasting 4 spacious bedrooms, 4 full bathrooms, and a powder room, this home seamlessly combines sophisticated architectural design with everyday comfort and incredible golf course views. From the moment you step through the grand entrance, you're greeted by soaring ceilings, abundant natural light, and clean, contemporary finishes. The main level centers around a brilliant open-concept floor plan—ideal for both hosting large gatherings and quiet family living. The chef’s kitchen serves as the heart of the home, featuring a generous central island, high-end quartz countertops, custom cabinetry, and premium JennAir and KitchenAid appliances. Upstairs, the layout features two primary/owner suites, offering an unmatched setup for guests, multi-generational living, or ultimate flexibility. Each primary suite serves as a private sanctuary with high ceilings, spa-inspired ensuite bathrooms—complete with a deep soaking tub, glass-enclosed walk-in shower, and dual vanities—along with tons of closet space throughout. Upstairs also features generously sized secondary bedrooms along with flexible multi-purpose living spaces, perfect for a game room, media room, or dedicated home office setup. Step outside to your personal backyard oasis with sweeping fairways as your backdrop. The expansive 0.398-acre grounds feature a covered patio equipped for outdoor living and dining, looking out over a beautifully landscaped yard with plenty of space for entertaining, play, or enjoying quiet evenings on the course. Complete with an attached golf cart garage, abundant storage, and refined details throughout, this turn-key property represents Texas golf course living at its finest.