Experience the extraordinary in this breathtaking penthouse offering over 900 sq ft of unrivaled private outdoor space. Perfectly positioned on the coveted 2nd block of Commonwealth Ave, this floor-through gem features a tranquil front deck overlooking the Comm Ave Mall and a rear deck with captivating views of the Church of the Covenant. Fully renovated and impeccably maintained, the home boasts hardwood floors throughout, a marble-clad kitchen with premium appliances, and a light-drenched living room with crown molding and seamless indoor-outdoor flow for effortless entertaining. The primary suite offers double closets and a spa-like marble bath with radiant heat and towel warmer. A second bedroom includes a built-in desk, walk-in closet, and deck access. The second bath, w/ plumbing in place for a full conversion, adds flexibility. With elevator access to floor 6, central air, automatic irrigation and two parking spaces, this spectacular residence is the pinnacle of Back Bay living.