Rare opportunity to own a single-family home plus duplex on one parcel! Ideal for an owner-occupant looking to offset their mortgage or an investor seeking strong income potential. Live in the vacant main residence while benefiting from rental income generated by the duplex, or maximize returns with over $100,000 annual gross income potential. The spacious 2,508 sq ft single-story ranch is filled with charm and features 3 bedrooms, 2.5 bathrooms, remodeled bathrooms, updated flooring, dual-pane windows, fresh interior paint, and fresh exterior paint. The stunning great room showcases soaring vaulted wood-beam ceilings, creating a warm and inviting gathering space. Enjoy the oversized covered patio, putting green, and inviting indoor-outdoor living. The duplex includes two updated 2-bedroom, 1-bath units, each with a garage, laundry, separate utilities, and a newer roof. Tucked down a lane yet conveniently located near downtown Martinez, restaurants, breweries, farmers market, Amtrak, waterfront trails, and easy access to Highway 4 and I-680. A rare blend of flexibility, income potential, and opportunity.