A rare opportunity to own one of Duarte's most distinguished historic estates. Commonly known as the Kellogg Mansion, this remarkable property blends timeless architectural character with an impressive 17,778 sq. ft. foothill lot. Offering approximately 3,768 sq. ft. of living space, the residence features elegant living areas, spacious accommodations, and a floor plan rich in charm, character, and versatility. This home is fully furnished. A private entrance provides access to guest quarters, offering added privacy and convenience for extended family, guests, or multi-generational living. Surrounded by mature landscaping and set in a desirable foothill location, the property showcases historic appeal rarely found in today's market. Expansive indoor and outdoor spaces create endless possibilities for entertaining, multi-generational living, a home office, creative spaces, or future customization. The home includes additional finished rooms that provide flexible use options beyond the bedroom count reflected in public records. Please see private remarks. Conveniently located near parks, hiking trails, shopping, dining, and major transportation corridors while maintaining the privacy and prestige of Duarte's coveted foothill community. A truly unique offering for buyers seeking history, character, and exceptional potential.