Hines partnered with Prime Asset Management to develop 717 Texas, a 33-story Class A office tower in Houston's downtown theater district. Designed by Hellmuth, Obata & Kassabaum, the granite-clad building features some of the most energy efficient and environmentally friendly office space in Houston. When 717 Texas achieved certification at the Platinum level under the U.S. Green Building Council's (USGBC) LEED rating system for Existing Buildings (EB), it was the first skyscraper in the state of Texas to achieve the USGBC's highest green building designation. Some of the green technology incorporated into the building include: electronic filtration of outside air floor-by-floor air quality monitoring and control treatment of all on-floor tenant supply air with ultraviolet light use of recycled materials in finishes carbon-filtered, ultraviolet light-treated, chilled drinking water delivered to every floor nine-and-a-half-foot ceilings with floor-to-ceiling windows The building was completed in 2003.