Achieving the tgs performance measures will help meet this goal.
Toronto green standard green roof.
The standard consists of tiers tiers 1 to 4 of performance measures with supporting guidelines that promote sustainable site and building design.
In 2009 toronto was the first city in north america to adopt a bylaw to require and govern the construction of green roofs.
The tgrcs establishes the city s requirements while also meeting the ontario building code obc requirements.
The toronto green standard is toronto s sustainable design requirements for new private and city owned developments.
The requirement ranges from 20 60 of the available roof space of a building.
Mid to high rise residential non residential version 3.
Residential apartment development 4 storeys and higher and all industrial commercial and institutional ici developments.