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.