Welcome to Residence 12D, a Classic Eight prewar co-op in the heart of the Upper West Side. This elegant eight-room home blends timeless architectural detail with modern convenience, offering gracious proportions, high ceilings, original moldings, hardwood floors, and a wood-burning fireplace. A vented in-unit washer and dryer adds rare practicality to this classic layout. Enter through a semi-private elevator vestibule into a gracious center entrance gallery that leads to a nearly 20-foot-wide living room with southern exposure and open sky views over double-wide 86th Street. The formal dining room sits just off the gallery, creating a natural flow for entertaining. A large paneled library is located adjacent to the south-facing primary bedroom suite, which is positioned separately from the additional bedrooms for privacy. The flexible layout includes three additional spacious bedrooms and two full bathrooms, allowing for multiple configurations including home office, guest space, or den. The expansive windowed eat-in kitchen offers abundant storage and counter space, double appliances ideal for entertaining, and a separate laundry room. Built in 1914, 151 West 86th Street is a distinguished prewar cooperative with a part-time doorman from 7AM to 12:45AM seven days a week, a live-in superintendent and handyman, a planted rooftop garden, private storage, central laundry room, and bike room. Pets are permitted and financing up to 65 percent is allowed. Ideally located near Central Park, Riverside Park, top Upper West Side public and private schools, shopping, dining, cultural institutions, and multiple transportation options, Residence 12D offers classic Upper West Side living at its finest.