Tucked away on a rare, almost half-acre lot, 20 Santa Rita Drive is a legacy estate cherished by the same family for over 30 years. Here, classic charm meets effortless modern living, anchored by a magnificent heritage oak tree that has stood for generations. This property offers a unique opportunity to "put down roots" in the truest sense-just moments from the vibrant energy of Downtown Walnut Creek. The residence has been thoughtfully updated to balance style with soul. The layout is as functional as it is beautiful, with seamless flow between indoor and outdoor living; ideal for both everyday moments and relaxed entertaining. The living room, featuring a cozy fireplace and large windows, frames peaceful views of the verdant grounds. At the heart of the home is a completely remodeled kitchen designed for the pace of modern life-the perfect backdrop for busy weeknight dinners and hosting friends with ease. The layout offers four spacious bedrooms, including a spectacular, oversized primary suite. The grounds are an outdoor wonderland. The massive, flat backyard-shaded by that iconic central oak-is a peaceful retreat that feels worlds away from the city. Whether you envision building a pool, cultivating a lush garden, or hosting summer galas under the stars, this land provides the space to grow. A major highlight is the expansive detached 350 sqft Casita. Featuring a full kitchen, ideal as a rental, office, au pair, or multi-generational studio. Coupled with an oversized garage and additional bonus room space, the property offers a level of versatility. Located in the desirable Walnut Knolls community, you'll enjoy a walk-to-everything lifestyle with direct access to world-class dining, boutique shopping, hiking trails and top-rated schools. Option to join the neighborhood association, offering access to a pool and community events - a true sense of connection. This isn't just a house-it's a sanctuary in a premier location with easy commuter access to the best of the Bay Area!