A study says the 49ers new stadium in Santa Clara is the trigger for billions of dollars in new projects.  

The "Mercury News" says nearly $3 billion worth of office buildings, retail centers, hotels and residences are under construction or on the drawing boards in the vicinity of Levi's stadium.  

Projects near the area will total 12-million new square feet of space, including 1,600 hotel rooms and several hundred residential units.  

The stadium officially opens in August.