521 Park Ave

Completed in 1911 and designed by William Alciphron Boring, this intimate 12-story prewar condominium on Park Avenue contains a small collection of residences that retain original architectural detailing. The masonry façade and generous, vertically proportioned windows reflect Beaux-Arts sensibilities; many apartments were originally full-floor homes and retain lofty ceiling heights and decorative moldings. Typical residences feature loft-like 10–11-foot ceilings, oversized windows with Park Avenue and city views, formal galleries, built-in millwork, multiple fireplaces, and layouts that can be reconfigured (units commonly offered as two-bedroom plans but convertible to larger multi-bedroom homes). Interior finishes described across listings include crown moldings, chandeliers, hardwood floors, marble baths, granite counters, walk-in closets, butler’s pantries and service areas in some units. Common building amenities emphasize full-service support: 24-hour doorman/white-glove staff, concierge/porter services, elevator service including a service elevator, a fitness room, private storage and laundry facilities in the basement, and roof deck access. The condominium is pet-friendly, permits pied-à-terres and flexible financing, and provides on-site management/handyman services. Located at the corner of 60th Street and Park Avenue, the building sits steps from Central Park, upscale Madison and Fifth Avenue shopping, notable hotels and fine dining, with convenient subway and bus connections; the neighborhood supports a refined, pedestrian lifestyle with immediate access to cultural institutions and luxury retail.