10400 La Costa Dr Rare space, flexibility, and lifestyle await in sought-after Onion Creek, featuring a highly desirable FHA assumable loan at just 2.875%. Set on an expansive .316-acre corner lot within one of South Austin's most established communities, this thoughtfully updated home offers the perfect blend of everyday comfort, entertaining space, and modern functionality. Mature trees, abundant parking, and exceptional outdoor amenities create a property that stands apart from the competition. The side-entry garage, extended paved parking area, and oversized lot provide room for up to five off-street vehicles, offering flexibility for guests, hobbies, or multi-driver households. Outdoors, enjoy a true backyard retreat featuring an expansive covered aggregate patio with lighting, a greenhouse with electricity, storage shed, dedicated dog run, and beautifully landscaped spaces designed for entertaining, gardening, and relaxing year-round. Inside, soaring vaulted ceilings and a floor-to-ceiling fireplace anchor the spacious living room, while the adjacent dining area is bathed in natural light from a dramatic wall of windows and French doors that seamlessly connect indoor and outdoor living. A wet bar adds convenience and charm for hosting family and friends. The updated kitchen combines style and functionality with quartz countertops, tile backsplash, updated sink, Delta Touch2O faucet, abundant cabinetry, and a sunny breakfast area. A dedicated executive office and CAT 6 wiring throughout provide the connectivity today's buyers need. The private downstairs primary suite serves as a peaceful retreat, complete with dual vanities, two closets including a walk-in closet, and a Jacuzzi soaking tub overlooking a private garden area. Upstairs, two secondary bedrooms share a Jack-and-Jill bath with separate vanities, creating an ideal layout for family or guests. Residents of Onion Creek enjoy 24-hour security, a golf-cart-friendly atmosphere, and optional membership at Onion Creek Club.