Charming and unique mansard style one bedroom penthouse with 430 sqft private walkout roof terrace! Easy living floor-through layout with dramatic city views, low HOA fee, A/C, and hardwood floors throughout. Open-concept, eat-in kitchen with elegant exposed brick boasts stainless appliances, granite counters, subway backsplash, and blue slate floors. Enormous walkout terrace expands the kitchen and adds tremendous versatility, perfect for hosting or alfresco dining. Formal dining area with pendant chandelier opens to southeasterly, front facing living room with lovely views of tree lined Tremont St. King size bedroom with excellent natural light and oversized closet. Tile bath with tub and elegant vanity. Modern upgrades include new windows/slate roof, in unit W/D, & keyless entry. Professionally managed, pet-friendly association. Convenient access to Starbucks, Restaurant Row, Back Bay and I-90/93.