The tgrcs establishes the city s requirements while also meeting the ontario building code obc requirements.
Toronto green standard green roof.
The requirement ranges from 20 60 of the available roof space of a building.
In 2009 toronto was the first city in north america to adopt a bylaw to require and govern the construction of green roofs.
The green roof bylaw sets out a graduated green roof requirement for new development or additions that are greater than 2 000 m in gross floor area.
Residential apartment development 4 storeys and higher and all industrial commercial and institutional ici developments.
The toronto green standard is toronto s sustainable design requirements for new private and city owned developments.
The toronto green roof construction standard tgrcs is the first municipal standard in north america to establish the minimum requirements for the design and construction of green roofs.
The standard consists of tiers tiers 1 to 4 of performance measures with supporting guidelines that promote sustainable site and building design.