Duke Realty Corporation operates as a real estate investment trust (REIT) in the United States. It offers leasing, property and asset management, development, construction, build-to-suit, and other tenant-related services. As of December 31, 2006, Duke Realty owned approximately 721 industrial, office, and retail properties comprising 113.8 million rentable square feet, as well as owned 6,400 acres of unencumbered land for development. The company has elected to be taxed as REIT under the Internal Revenue Code. As a REIT, it would not be subject to federal income tax purposes, provided that it distributes at least 90% of its REIT taxable income to its shareholders. The company was founded in 1972 and is headquartered in Indianapolis, Indiana with regional offices in Alexandria, Virginia; Atlanta, Georgia; Cincinnati, Columbus, and Cleveland, Ohio; Chicago, Illinois; Dallas and Houston, Texas; Minneapolis, Minnesota; Nashville, Tennessee; Orlando, Florida; Phoenix, Arizona; Raleigh, North Carolina; St. Louis, Missouri; and Tampa and Weston, Florida.