1000 Main, formerly Reliant Energy Plaza, is a 518-foot (158 m) tall skyscraper in Downtown Houston, Texas managed by Transwestern.

[1] It houses the headquarters of GenOn Energy, and the building has around 800,000 square feet (74,000 m2) of space.

Lights atop the building and on the main street side flash in patterns of various colors at night.

[citation needed] Century development built the Reliant Energy Plaza.

In 2003 Reliant Energy occupied more than 500,000 square feet (46,000 m2) of space in the building.