A rare, statement-level new construction, 15 San Juan Avenue sets a new standard in West Menlo Park. Spanning 4,726 sq. ft. across two levels on a private, tree-lined lot, this 5-bedroom, 5-bath Transitional residence delivers scale, design, and effortless indoor-outdoor living. The main level is built to impress. A dramatic vaulted great room opens seamlessly to the outdoor living spaces, creating a true California flow. The chefs kitchen anchors the home with a large island, butlers pantry, and central dining designed for both everyday living and entertaining. A private ADU with kitchenette and en suite bath offers flexibility for guests, office, or multigenerational use. Upstairs, a light-filled loft, dedicated laundry room, and well-appointed ensuite secondary bedrooms provide comfort and function. The grand suite is a retreat of its own, featuring two spacious walk-in closets and a spa-inspired bath with soaking tub, oversized shower, and refined finishes throughout. Located in the top rated Las Lomitas School District. Ideally positioned just blocks from Alameda de las Pulgas and minutes to Stanford University and Atherton, this home offers the rare combination of privacy, convenience, and elevated design.