The 2011 Annual Green Roof Industry Survey, sponsored by Green Roofs for Healthy Cities (GRHC), found that the green roof industry grew by 28.5 percent over the course of 2010. This is up significantly from 16 per cent growth recorded in 2009.
Green Roofs for Healthy Cities conducts an Annual Green Roof Industry Survey of its members to identify the square footage of green roofs installed each year, in each region of the country. The survey is conducted by an independent, third party consultant. The survey understates the size of the market since it is not completed by all of the companies that are actively designing and building green roofs.
The 2011 Annual Green Roof Industry Survey includes information on the growth of the green roof industry in North American cities, types of buildings where green roofs were installed, and the types of green roofs implemented.