Designed by internationally acclaimed architect Cesar Pelli, the 21-story Plaza Tower has been recognized as the architectural centerpiece for Orange County. Plaza Tower's slender, stainless steel facade is a beacon on the Orange County skyline. The efficient floor design offers column-free work space and ample window space providing spectacular views of all of Orange County.In 2009, this building was awarded LEED certification at the Gold level by the U.S. Green Building Council.In 2015, this building was awarded LEED certification at the Platinum level by the U.S. Green Building Council.This building was awarded an Energy Star label in 2009(75), 2012(94), 2014(85), 2015(88), 2016 (86) for its operating efficiency.