Excessive regulation is 90% of it. Here's how a rational market works. If I build an apartment complex, eventually those apartments will get older and more affordable. And even before that upper middle class folks will move in, freeing up their previous homes. But that's not how many in local governments see it. So you have affordable housing quotas on new developments. You have developers building units for the home…
If it was, then the housing price would be correlated with the level of regulation, but it's not (housing less dense places is always cheaper than housing in big cities, even if you compare the most heavily regulated place on earth with the least regulated big city in the world.
> Here's how a rational market works.
A rational market made from human is as realistic as “dry water”.
The key issue is that housing is treated as an asset, and the policies made to boost housing construction are designed around building a market in a way that gives housing the same kind of financial yields as stocks. But while stock prices can grow because productivity increase, housing value can only increase if housing becomes more expensive.