(Houston) - Two Houston buildings — Williams Tower and Bank of America Center — have been awarded the Leadership in Energy and Environmental Design (LEED) Gold certification for an existing building.

Williams Tower, the iconic development near The Galleria, is a 1.5 million-sf, 64-story office building that was developed by Hines in 1982.

Meanwhile, Bank of America Center, is a 56-floor, 1.3 million-sf office tower at 700 Louisiana in downtown.