Hines announced Wedensday that it has started construction on a 48-story office tower at the corner of Main and Texas in downtown Houston.

The project, 609 Main, is the first of several planned skyscrapers to break ground downtown. The building will have a little more than 1 million square feet of space when it’s completed in early 2017.

The property is being developed by the Hines CalPERS Green development fund, a partnership that focuses exclusively on developing sustainable office buildings throughout the United States certifiable through the U.S. Green Building Council’s Leadership in Energy and Environmental Design Core & Shell program. The same partnership developed BG Group Place, which the company sold last year to Dallas-based Invesco Real Estate for a reported $480 million. The 609 Main building was designed to attain Gold or Platinum certification.

The company has owned the full-block site since 2008. It began site work, including the demolition of an abandoned structure, last November.

General contractor D.E. Harvey will build the Pickard Chilton-designed tower.

See more pictures of 609 Main and other real estate projects that will reshape Houston’s skyline with the gallery below.