Enterprise Plaza (also known as 1100 Louisiana) is a 55-story skyscraper located on Louisiana Street in Downtown Houston, Texas, United States. The headquarters of Enterprise GP Holdings is located in the Enterprise Plaza. Enbridge's Houston offices are in Enterprise. Enterprise Plaza was constructed in 1980 by Hines. It was sold in 1985 to Capitol Guidance Corporation which sold it again to National Office Partners Limited Partnership (NOP), a joint venture between Hines Interests Limited Partnership and the California Public Employees Retirement System (CalPERS).
Hines Real Estate bought the tower in January 2000. Enterprise Plaza is an office building located in the heart of Houston's energy and financial corridor. It stands at 756 ft (230 m) tall with 55 stories. It was the tallest building in Texas from 1980 until 1982 when it was surpassed by the JPMorgan Chase Tower.