Douglas Elliman Real Estate started operating in 1911 in the Manhattan area of New York City. The company has offices spanning New York state and in regions of Florida, California, Connecticut and Colorado.
Douglas Elliman offers a full range of real estate services under its affiliate companies, including rentals, mortgages, property developments and title insurance. More than 5,000 agents help make Douglas Elliman the United State's fourth largest real estate firm. The company's partnership with Knight Frank Residential increases its reach globally. In 1989, Seymour and Paul Milstein bought Douglas Elliman, later selling the company to Insignia Financial Group, which then sold it to Montauk Battery Realty.