This rarely available nine-room D-Line is located in one of Carnegie Hill's most beautiful and sought-after prewar cooperatives. A private elevator foyer opens into a gracious gallery that leads to a sunflooded corner living room with sweeping Park Avenue views. Original parquet floors and a marble fireplace enhance this elegant space. Double doors open to a grand dining room, easily accommodating twelve guests. The windowed kitchen retains its original cabinetry and features a Sub-Zero refridgerator and Jennings stove. A pantry, outfitted with a Bosch dishwasher and Miele washer and dryer, connects to a charming breakfast area. There is a sunny library (or fourth bedroom), and two additional bedrooms with shared bathrooms all overlooking Park Avenue. The expansive primary suite, complete with a windowed dressing room, faces the building's beautifully landscaped private garden. An additional office/nursery with a dedicated bathroom completes the layout. This exceptional apartment features original prewar details including hardwood floors, abundant closet space, and new Pella windows throughout. 1088 Park Avenue offers full services, with a resident manager and a dedicated staff of sixteen. Residents enjoy a unique quarter-acre planted private garden with an Italianate fountain and multiple seating areas, two fully equipped gyms, bike storage, and a pet-friendly policy.