Calling all investors or end-users planning ahead! Inquire for more details! Penthouse D at 121 East 23rd Street offers a rare opportunity to own a thoughtfully designed, light-filled duplex home with sweeping skyline views, private roof space, and exceptional versatility. This three-bedroom, three-bathroom residence spans the 20th and 21st floors of Crossing 23rd, a full-service Gramercy condominium. Designed with privacy and function in mind, both levels are accessible by elevator, providing separate entry points and a sense of ease for daily living or entertaining. The upper level features an expansive living and dining area with soaring 10'4" ceilings and oversized windows that frame open views to the north and west, including iconic sights like the Chrysler Building, One Vanderbilt, and the Flatiron Building. The adjacent windowed kitchen is bright and well-appointed, with custom cabinetry, Caesarstone counters, and premium appliances by Bosch, Sub-Zero, and Wolf. A guest bedroom and full bath are also located on this floor. Downstairs, the primary suite offers a peaceful retreat with ample closets and generous proportions. The en-suite bath includes a glass-enclosed shower, soaking tub, and dual vanity finished in Calacatta marble. A third corner bedroom or home office and another full bathroom complete this level. Upstairs, on the top floor, a private rooftop terrace crowns the home, offering panoramic views of the Manhattan skyline and a quiet place to unwind above the city. Additional features include a stacked washer/dryer, central air via PTAC units, double-pane windows, recently updated lighting and warm cherry wood floors that run throughout. Crossing 23rd is a pet-friendly condominium with a 24-hour doorman, concierge, fitness center, bike room, resident lounge with terrace, and laundry facilities. Perfectly positioned between Gramercy and Flatiron, the building is moments from Madison Square Park, top dining, and multiple subway lines (6, N, R, F, M), making travel throughout Manhattan seamless. Whether you're seeking a smart investment or a future home with character, privacy, and views, Penthouse D is a rare find in one of Manhattan's most vibrant neighborhoods.