Welcome to 9443-9445 De Adalena Street, a rare and charming duplex in the heart of Rosemead. Originally built in 1928, this property blends classic Spanish-style architecture with modern versatility, offering two separate living spaces on a spacious lot. According to tax records, the combined living space totals approximately 2,641 square feet, with nearly 2,000 square feet in the front house and the balance in the private guest house. The front home features 3 bedrooms, 2 bathrooms, dramatic open- beam ceilings, arched doorways, and a stunning Batchelder tile fireplace as the living room centerpiece. An open floor plan, wide hallways, and a massive primary suite with extensive closet space add to its comfortable flow, while a hidden office nook and a convenient indoor laundry room off the kitchen provide smart everyday functionality. The rear guest house offers 1 bedroom, 1 bathroom, a full kitchen, and a spacious living/family room-perfect for rental income, extended family, or guests. The expansive lot is lined with fruit trees and offers plenty of room for gardens, recreation, or future amenities. A 2-car detached garage, bonus workshop, and additional storage space complete this special offering. Zoned R2 Duplex and centrally located near shopping, dining, and freeway access, this property is a rare opportunity to own a piece of history with room to live, earn, and grow.