After a full year of research, the largest, most comprehensive report on the economics, politics, history, and policies of zoning in Toronto is available for download.
The “Yellowbelt” refers to the portion of the city that’s zoned exclusively for detached homes. The report goes into detail explaining when and why such a zone came into existence, where it spreads in the city, who is hurt by the existence of this zone and how; and what it will take to change the system.
A summary of the report follows. Of course, the report itself goes into much more detail.