Built in 1881 as a Victorian-era brownstone, the home, known as The Block House, was thoroughly remodeled by the esteemed Henry Herts in 1906. Herts expanded the house to five stories and refashioned the facade in limestone adding Beaux Arts and neo-Classical elements. Occupied by many of New York's most notable families, the home has appeared in society pages throughout its history and even hosted the venerable Grace Kelly.

Set midblock between Fifth and Madison avenues in the serene Lenox Hill neighborhood, the property is conveniently located close to galleries, numerous consulates, high end hotels, chic boutiques and fine dining. Museum Mile offers some the worlds most famous works of art minutes away, and the vast Central Park unfolds just moments from your front door.

With its notable intact architectural detail, substantial footprint and exceptional location, The Block House is a truly unrivaled opportunity to create a new masterpiece mansion in the heart of the Upper East Side.

Disclaimer: Please note that these photographs are renderings.