This seems to be an overly pessimistic take, that prices will just always be high no matter what zoning reforms are introduced.
Places that have implemented wide-ranging zoning reform, i.e. Calgary and Edmonton, have house prices PSF roughly 60% less than the GTA. It's not because materials and labour are cheaper. It's because land is cheaper. Because in most of both of those cities, any detached house can be bought and turned into 2 semis, and any corner lot can be turned into 4 townhouses.
Edmonton housing prices have not declined post zoning reform:
Calgary's have only accelerated:
Just so we don't get into .....but that's only SFH ; here's the Calgary chart for apartment units:
Sorry to tell you, but zoning reform hasn't impacted prices in the least in either city.
You increase the supply of land, the price drops, it leads to lower prices for homes. Not overnight obviously, but there's a reason why the average price of a house only just reached levels from around 15 years ago, despite incomes continuing to rise.
Again, the prices in both these cities have not dropped.
But also, they are vastly more sprawling than Toronto.
Edmonton's population density is 1/4 that of Toronto; while Calgary is 1/3
The City of Edmonton (proper) is larger than the City of Toronto in area with about 1/3 the population.
The City of Calgary (proper) is much larger than Toronto at 825km2, (about 1/3) with 1/3 of the population.
But if it becomes much, much easier to turn a 1950s Don Mills bungalow into 3 townhouses, you'll see prices drop, or at least stabilize
This would be true if population growth matched new housing starts. But it does not. There is no capacity in the housing industry in Toronto to build anymore units than has been the norm the last few years.
But population grew faster than ever last year.
Changing the form of home does alter this fundamental fact, that demand not only exceeds supply, its getting worse.
Additionally, most developers have a back inventory of land, both greenfield (farm) and urban assembly that have already been paid for, and any development must price that in, developers will not build at a loss.