Affordable housing is a major topic for planning circles in Toronto.  Below is a collection of links addressing this issue.  
Sorry ... no digest as I haven't read them myself yet.
​Valerie

Official Plan Amendment 557 (requirements)
bill0877.pdf

Official Plan Amendment 558 (definitions)
https://www.toronto.ca/city-government/planning-development/planning-studies-initiatives/definitions-of-affordable-housing/
​
Report
​mmah-housing-affordability-task-force-report-en-2022-02-07-v2.pdf

http://app.toronto.ca/tmmis/viewAgendaItemHistory.do?item=2021.TE26.30
​

New initialisms, Major Transit Station Areas (MTSAs) and Protected Major Transit Station Areas PMTSAs), have crept into our development vocabulary.
The Province of Ontario needs the City to review our Official Plan by summer 2022.  This update will help us prepare for long-term growth over the next 30 years.  Toronto is expected to grow by 700,000 people and more than 450,000 jobs by 2051.  Now to the business of planning how to accommodate that growth. 

What are these 180 potential MTSAs?  Here is the LIST.  What data are associated with each of the MTSAs?  You might be curious to scroll through this DOCUMENT and see what metrics are assigned to each of these downtown MTSAs on TTCs subway line one. 
For example:

• Existing and permitted development within the Protected Major Transit Station Area – Spadina Station is planned for a minimum population and employment target of 300 residents and jobs combined per hectare.
• Existing and new development within the Protected Major Transit Station Area – College Station is planned for a minimum population and employment target of 1200 residents and jobs combined per hectare.
• Existing and new development within the Protected Major Transit Station Area – King Station is planned for a minimum population and employment target of 2000 residents and jobs combined per hectare.