Time for a new roof? The City offers incentives for the installation of green and cool roofs on Toronto's residential, commercial, industrial and institutional buildings. Green roofs are eligible for $100 per square metre, cool roofs from $2 to $5 per square metre. You can also get a grant to assess the capacity of your building to support a green roof. Learn more and apply. Find more information here: Eco-Roof Incentive Program.