Penthouse duplex in a beautiful brownstone on lovely Mount Vernon Street in Beacon Hill! Front entry is open and inviting with fabulous half bathroom and coat closet. Soaring ceilings in the living room/dining room with private balcony, gourmet cook's kitchen with top-of-the line appliances. Upstairs loft space can be study or den which leads to second bedroom with ensuite bathroom. Sunny master bedroom with en-suite marble bath and large walk-in closet. Notable details include hardwood flooring throughout, unsurpassed craftsmanship, exceptional natural light, cathedral ceiling with skylights, roof top cupola, private deeded storage room and nearby garage rental parking. Building was meticulously restored in 2011 with all new slate roof and systems and is 100% owner occupied!