A 2016 fifth floor addition above the original four-story brownstone makes this three bedroom penthouse a luxuriously spacious duplex with direct elevator access. Features include a stone-face soaking tub in the master bath, a powder room tucked in the corner of the top-level living space, an enormous walk in closet outfitted with walnut cabinets, the quietest appliances available, and a built-in safe. The unit has a total of three decks, with one off the fourth floor master bedroom, one looking southeast over the Back Bay rooftops with a gas grill and kitchenette included, and one looking northwest across the Charles toward MIT. Indoors is just as sunny due to the skylights above, which have custom remote controlled shades. This unit has quarter sawn white oak floors with a white stain, LED recess lighting, gas fireplace, custom cabinets, and one inch thick thermal panes to insulate the forced air warming and cooling. This home is not to be missed! One garage parking space included.