Situated on a generous 27,370 +/- square foot flat lot in one of San Marino's most coveted residential neighborhoods, 1455 Chelsea Road presents a distinguished single-story residence that blends timeless character, privacy, and refined California living. Set back from the street by an expansive lawn and long driveway, the home spans approximately 3,480 square feet and features four bedrooms and four bathrooms thoughtfully arranged for both elegant entertaining and comfortable daily living. A welcoming foyer introduces the home's gracious public spaces, where hardwood flooring extends throughout the formal living, dining, and family rooms, enhancing the home's warmth and architectural continuity. The spacious living room, centered around a fireplace, leads to the family room that opens directly to the terrace and surrounding grounds, creating a seamless indoor-outdoor connection. Multiple seating and dining areas overlook the beautifully landscaped backyard, where a large pool, pool deck, and lawn provide an ideal setting for open-air dining and poolside relaxation. The kitchen, complete with a breakfast area, integrates naturally into the home's thoughtfully designed floor plan.The private living quarters are highlighted by a spacious primary suite featuring substantial closet space and a well-appointed en-suite bath. The property features two motor courts plus a three-car garage. Located within the award-winning San Marino Unified School District, this residence represents a rare opportunity to own an exceptional property in one of the region's most sought-after communities.