Originally designed & custom built by the owners for multi-generational living, this exceptional single-story estate offers remarkable privacy, flexibility, & timeless appeal. First time on the market, the residence has been lovingly maintained by one family for generations & presents a rare opportunity to own a home in one of San Marino's most prestigious neighborhoods. Ahead of its time, home was built with a hot water recirculating system for instant hot water everywhere, a private ADU/in-law suite for extended family, & walk-in closets in both primary suite & ADU bedroom. Set on a private corner lot, property reflects decades of meticulous upkeep, thoughtful enhancements, & pride of ownership. Offering about 3,188 sqft of living space on an expansive 15,250 sqft usable lot, home features 5 spacious bedrooms & 4 bathrooms, including a private in-law suite with separate entrance & kitchenette, ideal for family, guests, or professional office! The home offers a floor plan for everyday living & effortless entertaining. Thoughtfully designed for comfort & functionality, all rooms have generous proportions, natural light & views of mature landscaping. The elegant living room flows seamlessly into dining area. At heart of the home, kitchen invites conversation & connection around a large island. Home chefs will appreciate the abundance of storage, sleek newer appliances, & a charming nook. The tranquil primary suite showcases warm earth-toned marble, a beautiful walk-in tile shower, & views of the San Gabriel Mountains. Recent improvements include professional landscaping, fresh interior paint, updated interior & exterior lighting, new carpeting, & dual-pane windows. Enjoy the beauty of mature trees and spacious back patio with a soothing fountain and landscape lighting. A horseshoe driveway creates generous parking & convenience. Ideally located within the award-winning San Marino Unified School District, recognized among California's top-performing schools, & in close proximity to highly acclaimed San Marino High. Tucked away from major traffic corridors, the home enjoys a peaceful residential setting while remaining moments from The Huntington Library, Lacy Park, Old Town Pasadena, Caltech, & The Shops at Santa Anita. Enjoy convenient access to trendy shops along Huntington Drive, and upscale dining in Pasadena & Arcadia. A rare opportunity to enjoy timeless elegance, multi-generational versatility, & premier San Marino living