Rarely available penthouse triplex just steps to the best of the South End and the Back Bay. Three plus bedrooms with two and a half baths, private outdoor space and a great layout. The gracious entry vestibule creates the perfect landing space for bikes, stroller, coats and shoes. One flight up, the main living level opens to soaring 11+ foot ceilings, beautiful hardwood floors, and abundant natural light. The living and dining areas showcase historic crown molding and custom built-ins. The chef's kitchen features a Viking gas range, stainless-steel appliances, stone countertops and excellent storage, with direct access to a private deck-ideal for morning coffee, al fresco dining and entertaining. A convenient half bath completes this level. The next floor is dedicated to the primary suite, featuring a spacious full bath with beautiful tile and a large glass-enclosed shower. An adjoining flexible space offers exceptional versatility as a dressing room, nursery, sitting area or home office. The bedroom area has beautiful original detail and bed alcove. The top floor front bedroom includes an adjoining room that could serve as a home office, nursery or potential additional bedroom. The second bedroom features a wall of windows and lovely South End views. Garage rental parking is conveniently available at The Atelier 505, just a few steps away. Central air conditioning, hardwood floors throughout and an abundance of architectural character complete this truly special home.