Even within the constraints of a top floor in a six-story brick structure on a tight Manhattan site, it is possible to create an expansive interior environment through the deft manipulation of light and space. Kathryn Dean, principal of the New York firm Dean/Wolf Architects, achieved this feat in her design of the Garden Light Loft for Dr. Bradley Schiff, his wife, Jen Roff, and their two daughters. Reworking and expanding the sixth level and the roof of a 1920 brick-and-timber former warehouse in Tribeca took ingenuity and daring.