What is the cost per square foot for home additions?

The property was once a marsh fed by Minetta Brook. It was located near a Native American village known as Sapokanikan or "Tobacco Field." In 1797, in the midst of a yellow fever epidemic, the Common Council purchased 90 lots for a new potter's field, or public burial ground. The field was also used for public executions, giving rise to the tale of the 350 year old Hangman’s Elm which stands in the northwest corner of the park. The cemetery was eventually closed in 1823 and designated as a public park. To this day, the remains of more than 20,000 bodies rest under Washington Square. In 1871, the park was relandscaped by the newly-formed New York City Department of Parks. The square became one of the city's finest residential addresses in the mid- and late-19th century.