This apartment in a pre-war Brooklyn Heights building contains a series of versatile spaces and carefully selected furnishings and finishes that serve the many needs of a family with two teenagers. Conceived as one, loft-like space, it functions as a three-bedroom apartment. Built-in furniture and storage components clad in anigre and sycamore divide the main areas. The living room and adjacent office (with Murphy bed) convert to a formal dining room or a guestroom via a sliding wall. In the teenagers’ rooms, built-in furniture and beds maximize available space. Materials include dark aniline-stained floors, schist countertops, and glass tile.