66 East 55th Street offers a building-within-a-building commercial condominium in an unmatched Midtown Manhattan location. Situated between Park and Madison Avenues, the property is set within a modern luxury building designed by Kohn Pedersen Fox, providing a prestigious presence in Manhattan’s Plaza District. The commercial condo portion features an exceptional, turnkey buildout with premium finishes, open layouts, and specialty amenity spaces. Formerly operated as a luxury wellness and hospitality venue, the building is ideally suited for owner-users, private membership clubs, medical/wellness groups, or flagship retailers.