Rare opportunity to live on this most coveted block! Tree-lined and beautiful, Mariposa is Berkeley at its best, equidistant to Solano, Gourmet Ghetto, Monterey shops, with easy access to downtown & beyond. This handsome updated Colonial offers gracious rooms, accessibility, & the enjoyment of a park-like garden! Grand living room with fireplace, spacious dining room, classic stairwell, an updated kitchen with new counters & S/S appliances + updated half bath are on the main floor, expanded with a generous flexible space: use as a family room, or a super master suite, with radiant floors & adjoining ADA compatible bath. Suite opens to a brick patio & expansive, fenced garden. Upstairs are 3 bright bedrooms, including a lovely main room w/peak of bay views, & a spacious remodeled bath. Storage/studio or exp. to ADU? New interior paint, refinished floors, & lighting throughout. Enjoy dual-pane windows, seismic retrofitting & updated systems. Join the fun on Halloween!