According to the Conservative plan, they look to (in full):
Source:
Secure The Country - Secure the Future (page 50)
But then when you look at StatCan:
Source:
The Daily — Canadian Housing Statistics Program, 2019 (2019 was the latest study I can find, but we shouldn't expect double digit growth over 2 years)
So O'Toole wants to ban foreign investment, which really only makes up 2.6-5% of the housing market, but still encourage foreign investment in "housing that is affordable to Canadians" without providing any details (aka they won't do shit). Releasing 5% of housing currently owned by foreign investors will barely make a dent to improve affordability. Rising housing prices is caused by others factors (e.g. affordable mortgage rates that allow wealthy Canadians to hog up properties, driving up prices). In my neighborhood, I know of CANADIANS owning 5+ properties.
Nothing in the Conservative plan demonstrates a substantial decrease in housing costs.