23 Park Ave

Built at the end of the 19th century, this five-story Italian Renaissance–inspired palazzo was originally a single-family mansion and later converted into a cooperative with multiple duplex residences. Architecturally distinguished by period details, the structure retains high ceilings, ornate moldings, original woodwork, and large multi-paned windows that admit abundant sunlight. Units are predominantly two-bedroom duplexes with generous living and dining rooms, working fireplaces in some homes, separate service entrances in select layouts, and provisions for in-unit laundry in renovated apartments while shared laundry remains available in common areas for others. The building’s interiors reflect a mix of restored prewar craftsmanship and modern updates—renovated kitchens with high-end appliances, marble-clad baths, built-ins, and occasional mezzanine or lofted spaces. Common areas are intimate rather than expansive: a staffed superintendent is present and the coop offers landmarked exterior facades, limited outdoor amenities such as private ground-level gardens or small patios for certain units, and controlled building services. Pet-friendly policies exist; subletting and flip-tax provisions vary by unit and coop rules. Located on a tree-lined Park Avenue block in Murray Hill near Grand Central, the property places residents within easy walking distance of transit, cultural institutions, restaurants, and Midtown conveniences.