Welcome to Apartment 1A/F at 850 Park Avenue, an extremely rare maisonette featuring a private lobby entrance. Seize this chance to craft your dream home in a prestigious Park Avenue prewar building on the Upper East Side. Located in a coveted corner position with 50 feet of frontage on Park Avenue, this 3,000-square-foot space offers immense potential for residential transformation. Currently configured as a medical office, this apartment presents a versatile canvas for creating a truly unique, luxury residence. Housed within a stunning 12-story building designed by the esteemed architectural firm Rouse & Goldstone in 1914, 850 Park Avenue comprises only 52 exclusive residences, ensuring privacy and elegance. One of the apartment's defining features is the beautifully preserved 1906 marble and gold leaf fireplace, an extraordinary focal point that adds a sense of timeless sophistication to the space. Located in one of Manhattan's most sought-after neighborhoods, this home is surrounded by the cultural and artistic landmarks of the Upper East Side. Just steps away, Madison Avenue offers a curated selection of high-end boutiques, galleries, and fine dining. The nearby Metropolitan Museum of Art and the Frick Collection provide world-class cultural experiences, while Central Park is a short stroll away, offering an oasis of greenery and recreation opportunities.