River House is New York City's best residential tower. For the first time in its 82-year history, what is known as the Residence is being offered for sale. While functions today as its club, it will be one of the grandest urban residences in the world and the largest single family home in New York City, measuring over 62,000 square feet on five levels. It is also the most important private residential property in New York City history to come to market. The building was designed by the classical American architect, William Bottomley, to epitomize the height of luxurious living when the building opened in 1931. The images below are the proposed plan designed by Tpony Ingrao.