Welcome to 319 Castenada Drive-an exceptional opportunity to own a spacious, sun-drenched single-level home in the heart of Millbrae's prestigious Mills Estates. Nestled on an expansive 15,365 sq ft lot, this beautifully maintained residence offers 4 generously sized bedrooms and 2 full bathrooms, perfect for comfortable everyday living and effortless entertaining. Step inside to find a warm and inviting living room centered around a classic fireplace, flowing seamlessly into the dining area-both enhanced by large sliding glass doors that open to the sprawling backyard. Picture hosting summer gatherings or enjoying peaceful mornings in this private outdoor retreat, full of space and potential to make it your own. Bathed in natural light from large, picturesque windows, the homes interior feels open, airy, and welcoming. The flexible layout and generous lot provide endless options to expand, customize, or simply enjoy as-is. Ideally located just minutes from vibrant downtown Millbrae, you'll enjoy a diverse selection of shops, restaurants, cafes, and top-rated schools-all with easy access to major transit routes for stress-free commuting. Don't miss your chance to create something truly special in one of the Peninsulas most sought-after neighborhoods!