Ideally situated on a quiet street in the Marina, this extensively renovated two-unit building lives like a sophisticated single-family residence while offering the rare flexibility of a separate guest, au pair, or income-producing unit. Thoughtfully reimagined with refined modern finishes throughout, the home is defined by wide-plank white oak floors, high ceilings, and an exceptional sense of scale and volume. The main level unfolds as one expansive entertaining space designed for both comfortable daily living and large-scale gatherings. At its center is a beautifully appointed chef's kitchen featuring a substantial island with counter seating, premium Miele appliances, a walk-in pantry, and custom cabinetry. On one side, the living and dining areas open directly to a patio with BBQ, creating a seamless indoor-outdoor connection. Opposite the kitchen, an expansive family room offers a more relaxed gathering space, while a well-appointed powder room completes the level. The bedroom floor is composed of four bedrooms and three baths, including an impressive primary suite with two walk-in closets and a spa-like bath featuring a soaking tub, walk-in shower, dual-sink vanity, and separate water closet. The upper level offers exceptional flexibility with a fifth bedroom or office, full bath, and direct access to a large terrace with Golden Gate Bridge views. An adjacent sitting room opens to an additional deck, while a roof deck accessed via a dramatic operable skylight captures sweeping bridge views. The lower level features a separate one-bedroom, one-bath residence with an open floor plan and direct walk-out access to the garden. A two-car garage completes the home. Ideally located near the shops and restaurants of Chestnut Street and the Marina Green, the property offers an exceptional blend of scale, flexibility, and indoor-outdoor living in one of San Francisco's most coveted neighborhoods.