Toronto to Mandate Green Roofs for Most New Construction
Notwithstanding many of the persistent- and still emerging- concerns over the increased risks from their installation, Toronto is on the verge of becoming the first city in North America to mandate green roofs for most types of new construction. By a vote of 36-2 which, according to the National Post, “was adopted after remarkably little debate on the floor of council,” the sweeping legislation requires green roofs on all residential buildings over 6 stories, schools, affordable housing developments, commercial, and industrial buildings. The legislation is slated to take effect on January 31, 2010 for new residential and commercial construction; industrial buildings are not impacted until January 31, 2011. The development community in Toronto opposed the legislation on the basis of increased costs, while green roof advocates believe the legislation is not broad enough, and actually successfully fought to increase its purview over a previous iteration of the bill. Toronto’s mandate is interesting to consider in light of the risks that we have pointed out previously both here at GRELJ and over at gbNYC with respect to green roofs generally.


