New Construction in a classic Back Bay brownstone ideally located on the second block and sunny side of Marlborough Street. Upper level 2 bedroom, 2.5 bathroom duplex with dramatic chandeliered living area and floor to ceiling fireplace mantle. Option to convert into a 3 bedroom. Gourmet kitchen featuring a full suite of Wolf and Sub-Zero appliances, with an impressive walnut topped dining area. King size master bedroom, with spacious walk-in closet and Carrara marble ensuite bathroom. Sprawling new windows, custom cabinetry and millwork, new heating/cooling system, hardwood oak flooring and abundant storage throughout. 2 deeded parking spaces (one full tandem) complete this stunning home.