Exquisite penthouse duplex on the first block of Commonwealth Ave! This owner occupied, professionally managed building is comprised of 3 units and offers secure direct elevator access, private storage closet, and on-site garage parking. Welcomed into the main living level of this gracious penthouse by a magnificent staircase, you are immediately drawn into the formal living room with its large Comm Ave facing windows, beautiful fireplace and attached private office with its own fireplace, built-ins and Comm Ave views. A formal dining room is adjacent to an open family room and kitchen that offers direct access to a private deck. A well designed kitchen with abundant storage, gas cooking, 3 ovens, top-of-the-line appliances and an island with breakfast bar. The kitchen also has access to a back hall w wine storage and second staircase, as well as the powder room and front hall closet. An elegant skylit staircase floods the home with natural light and leads to the upper level of the home. 3 generous bedrooms including a large front facing primary suite with fireplace, 5-piece stone bathroom and attached dressing room. 2 additional bedroom share a beautiful stone bathroom. A full staircase and head house with wet bar open to a sensational and large roof deck! Ideal for entertaining, this urban oasis has water, electricity and sensational views over the Comm Ave Mall. This gracious home also offers a 4 gas fireplaces, storage, a laundry room, central air, and many built-ins throughout. Complete with captivating views of the Back Bay skyline and Comm Ave Mall, this fabulous penthouse has it all including on site garage parking for 4 cars!