City Leads Green Roof Movement

Toronto: A Pioneer and Leader 

The City of Toronto is a pioneer and leader in green roof movement in Canada. It is the first city in North America to adopt a green roof bylaw requiring 20-60% vegetation coverage on all new buildings or new additions with gross floor area greater than 2,000 m². 

Half a Million M²

Since the bylaw was introduced in 2009, more than 500,000 m² of green roof have been constructed.

Toronto has more green roofs installed per year than the rest of Canada combined.

Among the Top

Formerly nicknamed Hogtown,  Toronto now boasts a ranking in the top 3 municipalities with most green roofs installed annually in North America. 

Let’s take a look at what make Toronto’s green roof movement so successful making other municipalities green with envy! 


Green Roof Bylaw 

The City of Toronto Green Roof Bylaw requires all new residential, commercial and institutional buildings with gross floor area (GFA) greater than 2,000 m² or new additions where the GFA is greater than 2,000  m² to install a green roof.


Size of Green Roof

The green coverage increases with a graduated scale from 20 to 60% of the available roof space based on the GFA. For industrial buildings with GFA greater than 2,000 m², the green roof coverage is the lesser of 10% or 2,000 m². Otherwise, the owner must pay $200/m² cash-in-lieu for non-compliance. 



Eco-Roof Incentive Program 

The Eco-Roof Incentive Program provides grants to support vegetated roof and cool roof installations on Toronto buildings that are not subject to the green roof bylaw, e.g. homes and retrofits that are less than 2,000 m² GFA. The program offers $100/m² for vegetated  roof installed and up to $1,000 for a structural assessment. It also offers $5/m² for a cool roof with a new membrane or $2/m² for a cool roof coating over an existing roof. 

Green Roof Construction Standard 

All green roofs that are subject to the Green Roof bylaw or are eligible for the Eco-Roof Incentive Program must be built to the Toronto Green Roof Construction Standard, which sets out minimum requirements that meet the City’s objectives and the Ontario Building Code requirements. The Green Roof Construction Standard: Supplementary Guidelines contain “best practices” in the design and construction of green roofs and address key topics such as structural loads, slope stability, wind uplift, fire safety, waterproofing, drainage, water retention, plant selection and performance, irrigation and maintenance. 

All NLSM’s green roof systems meet the City of Toronto Green Roof Construction Standard. Interested to learn more? Please attend our live educational webinars or contact a member of our sales team


Join us for Free, Live Webinars

Green Roof NutsN’Bolts Series: An A-Z of Essential and Practical Tips to Achieve Success

Special Topic Green Roof Webinars – Engineering Vegetated Roofs for Stormwater Management and Wind Design for Modular Vegetated Roof Assemblies


Certificate of Completion will be issued for:

AIBC Core Learning Units

OAA Structured Learning Hours


Next Level Stormwater Management logo in bold blue with logo above in blue and greenNLSM has supplied more than 2.5 M SQFT coast to coast

NLSM is Canada’s leading supplier of pre-vegetated roofs such as LiteN’Less™, Xeroflor® and StormCap™ systems. We customize to local requirements. Offer warranty& maintenance support, provide ​stormwater calculations specific to location ​and building/roof type, stormwater test data & related innovative hydrologic modeling. Email or call (416) 637-5772 Ext 1.