Green Roofs May Be Mandated in Toronto

Toronto City Council is planning to vote on a measure that would require green roofs on most buildings over 54,000 square feet, which would make it the first North American city to require green roofs. Developers are opposing the move.

1 minute read

April 17, 2009, 8:00 AM PDT

By Nate Berg


"The Toronto council this month got a look at a proposed green roof by-law that would make such installations mandatory on certain new developments with a gross floor area exceeding 54,000 square feet. The measure, which is a component of Mayor David Miller's environmental strategy, proposes greening 30 to 60 percent of the roof area, depending on building size. Exemptions include schools, industrial structures, low- to mid-rise apartment buildings and affordable housing."

"If adopted, the city of Toronto would be the first municipality in North America with a mandatory green roof by-law. Similar requirements exist in Japan, Switzerland, Germany and France, according to Steven Peck, president and founder of Green Roofs for Healthy Cities, an industry association based in Toronto. Mr. Peck said he expects the measure to pass. 'We have a very broad base of support for this,' he said."

"That may be an overstatement. The council was to vote on the by-law this week, but the decision has been postponed for a month so the city can consult with developers, who have loudly opposed the measure, arguing that it would scare away investment due to the high cost of green roofs."

Thursday, April 16, 2009 in The New York Times

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Use Code 25for25 at checkout for 25% off an annual plan!

Interior of Place Versailles mall in Montreal, Canada.

Montreal Mall to Become 6,000 Housing Units

Place Versailles will be transformed into a mixed-use complex over the next 25 years.

May 22, 2025 - CBC

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

May 28, 2025 - Diana Ionescu

White and yellow DART light rail train in Dallas, Texas with brick building in background.

DARTSpace Platform Streamlines Dallas TOD Application Process

The Dallas transit agency hopes a shorter permitting timeline will boost transit-oriented development around rail stations.

May 28, 2025 - Mass Transit

Screenshot of shade map of Buffalo, New York with legend.

Interactive Map Reveals America's “Shade Deserts”

Launched by UCLA and American Forests to combat heat-related deaths, the tool maps the shade infrastructure for over 360 U.S. cities.

June 3 - UCLA Newsroom

Close-up of person putting sticker on back of basket of electric tricycle with mock license plate reading "E-TRIKE."

Bicycles and Books — In Sacramento, Libraries Now Offer Both

Adult library card holders can check out e-bikes and e-trikes for up to one week.

June 3 - The Sacramento Bee

Large pile of unsorted garbage in landfill with birds flying above at sunrise or sunset.

Colorado Landfills Emit as Much Pollution as 1M Cars

Landfills are the third-largest source of methane pollution in Colorado, after agriculture and fossil fuel extraction.

June 3 - Colorado Newsline

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.