Art advisor and curator Priscilla Caldwell bought this 14-foot-wide townhouse in Brooklyn’s Cobble Hill neighborhood—which had been occupied by the same family for generations—and quickly called upon architect Nate McBride to complete a gut renovation. By moving the existing staircase to the back of the house, the architect created a new layout that makes each floor into its own 14-by-23-foot space. "Think of them as three stacked mini lofts," McBride says.