The clients, one an artist, poet, and professor, and her husband, an administrator at the Library of Congress, asked us to convert this Brooklyn row house into a series of lively, light-filled spaces. They also wanted the house to accommodate their two shy but inquisitive cats—with ways for the cats to slip away from unexpected guests. The key feature of the reconfigured house is an airy, parlor-floor living space. The 20-by-50-foot room is bordered by bookshelves configured around cat circulation routes. Shelves project to create steps for the cats to climb up to a continuous open ledge where they can observe activities below. Trap doors allow the cats to access second-floor rooms at either end of the house. Inset in the shelf wall is a diorama designed by the owner of a living room concealed behind a front door painted to match the front door of the house. Other recesses, some painted in Benjamin Moore’s Melon Popsicle, house the owners’ collections of small objects. A central skylight brings light through the second floor to the main living space. The floor is organized into four separate areas—the living room, media room, dining area, and kitchen—that pinwheel around the functional wall floating in the middle of the space, which defines a hallway zone that provides access to the powder room and basement. On the other side, the wall defines the media room seating area, and also screens the kitchen in the back from the living room in the front. At the back of the house, a two-story wall of glass floods the interior with light. Outside, stairs lead down to the rear yard. On the second floor, a studio for the artist/poet occupies the back half of the house. A balcony projecting from the window wall allows the client to step outside for quick breaks from work. In the corner is her sky-lit “nest”—a partially concealed, elevated space to write and think in. The structure is formed from dimensional lumber and wood elements recycled from the house. Below grade is a “cat free zone” intended for guests. The front room is configured as a workout space. A guest suite occupies the back; a glass door provides access to the newly landscaped rear yard. Splashes of color in the form of yellow-hued columns and a green bench keep the lower level bright and inviting. Materials in the original house were recycled whenever possible. The existing paneled wood doors, doorknobs, and hardware were reused and the pine flooring was refinished. An antique wood storage unit was incorporated into the new shelving wall. Paints and finishes emphasize original details wherever possible.