Enterprise Plaza is a 55-story, 230 m skyscraper at 1100 Louisiana Street in downtown Houston, Texas The headquarters of Enterprise Products is located in the Enterprise Plaza. Enterprise Plaza was completed in 1980 by Hines. It was sold in 1985 to Capitol Guidance Corporation which sold it again to National Office Partners Limited Partnership, a joint venture …Enterprise Plaza is a 55-story, 230 m skyscraper at 1100 Louisiana Street in downtown Houston, Texas The headquarters of Enterprise Products is located in the Enterprise Plaza. Enterprise Plaza was completed in 1980 by Hines. It was sold in 1985 to Capitol Guidance Corporation which sold it again to National Office Partners Limited Partnership, a joint venture between Hines Interests Limited Partnership and the California Public Employees Retirement System. Hines Real Estate bought the tower in January 2000.