Nestled in the heart of San Marino's prestigious Poet's Quarter, 642 Canterbury Road stands as a piece of the city's architectural tapestry, masterfully blending the distinguished character of a 1941 Colonial Revival with the expansive, refined proportions sought by the modern luxury buyer. Originally a collaboration between architect Curtis Chambers and renowned artisan-builder Earle Hugens, this estate has been meticulously preserved by only a few discerning stewards over the last half-century with a $1 million renovation in 2010. The residence offers 5,603 square feet of impeccably curated interior space, featuring a grand foyer, a private office, formal living and dining rooms adorned with intricate moldings and ornate stone fireplaces, and authentic tin-ceilings. The heart of the home is a sophisticated chef's kitchen, featuring a premier Viking appliance suite, three Fisher & Paykel dishwashers, and the iconic House of Rohl Shaw's farmhouse fireclay sink, complemented by a bespoke Gantry faucet, all flowing into a family room that bridges historical integrity with contemporary living. The private quarters including 4 bedrooms and 4 bathrooms occupy the second level. Expanded to offer a true sanctuary from the day, the primary suite is an oversized retreat featuring custom dual closets and a private, light-filled lounge that frames serene treetop views. The adjoining primary bathroom is a masterpiece of restorative luxury. It is anchored by the exquisite BainUltra Elegancia bathtub, which offers the signature, therapeutic Air-Thermomasseur experience. This spa-inspired haven is further enhanced by the precision of a California Faucets thermostatic shower system and the restorative warmth of a full Steamist installation. Beyond the interior, French doors open to a nearly half-acre sanctuary featuring a covered patio, a sparkling pool, waterfalls and spa, mature landscaping, and an outdoor kitchen equipped with Twin Eagles grill appliances perfect for hosting social gatherings. The property is further distinguished by a detached, pool house with vaulted wood-beamed ceilings, a prep kitchen, and flexible multi-purpose space that could serve as a bedroom. Situated moments from the Huntington Library,top-tier San Marino schools,Poly Tech,the famed Cal-Tech neighborhood, and the vibrant retail and dining of Pasadena's South Lake area, this residence offers an unparalleled opportunity to own a storied piece of San Marino's heritage.