This light-filled, two-bedroom pre-war apartment on the Upper West Side was updated with modern materials and finishes to bring it to the 21st century. Ceiling planes of different heights suggest different functions while maintaining openness and light. Throughout the apartment, built-in cabinets beneath the windows maximize storage space and integrate heating and cooling units. Simple but sumptuous materials including mosaics, marble tiles, dark wood, and translucent glass five the compact space an air of polished sophistication.