51 E 90Th St

A boutique prewar cooperative erected in 1926, this ten-story, full-service building exemplifies Carnegie Hill residential character. Designed by George Pelham-era architects, the property presents classic masonry façades, beamed high ceilings in many units, and traditional corridor access with three apartments per landing in several stacks. Residences are primarily two-bedroom configurations and Classic Six layouts, with formal entry foyers, separate dining rooms, windowed kitchens and multiple bathrooms; many homes retain original millwork, hardwood floors, and large multi-pane windows, while several listings note renovated kitchens and upgraded systems. Common areas and building services emphasize convenience: a 24-hour doorman, live-in superintendent, elevator service, communal laundry and bicycle storage. Storage lockers are available for rent and private outdoor terraces or small balconies exist in select units. Mechanical allowances include through-wall air conditioning and board-approved washer/dryer installations. The cooperative board permits pets, pieds-a-terre in some cases, and financing up to typical mid-range co-op limits (commonly 60%–75% by listing). Located on a tree-lined block between Madison and Park Avenues, the building sits one block from the Engineer’s Gate of Central Park and the Jacqueline Kennedy Onassis Reservoir, close to Museum Mile, transit, shops and neighborhood schools, offering a quintessential Carnegie Hill lifestyle.