The Places to Grow Act essentially said that to contain endless sprawl, urban areas had to intensify. To accomplish that, the City of Toronto would have to find space for at least a million more people, and for that to happen, zoning restrictions would have to be modified in places where the City wanted the growth.
The City has made some progress towards that through various measures that direct growth like the Avenues study, but it has not managed a comprehensive update to its zoning. That means that just about every application of any size (and that's most applications these days) requires a zoning amendment, and why if the City acts too slowly (giving a developer the right to appeal a lack of decision in a timely fashion to the OMB) or too restrictively, that developers most often win at the OMB. Everyone going to the OMB typically says "our development supports the intensification aims of the Places to Grow Act", and as long as they don't ask for something absolutely unprecedented, they usually win. (Recently, the OMB has shown a liking for the new Tall Buildings Design Guidelines, and developers who have sought approval for applications that go beyond what the TBDG allow have not met with as much success.) The TBDG, BTW, typically allows for much more than current zoning on most sites does, while still placing restrictions on them.
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