Many homes are vacant due waiting to make money via AirBnB.
Many office towers are empty and could be converted to apartments
Some homes are empty because they are investment vehicles and must be kept pristine to keep their value.
Homes are made unaffordable by Corporations outbidding anyone trying to buy a home.
Please note that all these issues are provincial domain. (b/c of division of powers) The PROVINCES are the ones doing nothing but it's politically advantageous for them to make the Federal look bad.
Since JT is probably not going to win the next election, could he call the Provinces' bluff and declare martial law on provinces that shirk their responsibilities on the housing issue?