People intuitively jump to the conclusion that the problem is caused by a lack of building. While more building would help, a lack of it isn't the main cause of this problem. Ask yourself, do Canada, Australia, New Zealand, the US, Britain, Ireland, etc, all have the same inability to build or is there maybe some other common cause? In my view this is symptomatic of a more fundamental issue - global asset price infla…
Sort of? See eg https://www.ft.com/content/dca3f034-bfe8-4f21-bcdc-2b274053f... for some graphs that show Europe vs anglophone countries in an obvious way. Obviously there are lots of differences between the countries, eg the specifics of their planning systems and economies. The US is different because of the big diversity of local governments – housing is more affordable lots of people outside of desirable cities, and places like Austin and Houston do build lots of homes and that seems to be a possible reason they haven’t grown like prices in California.
Credit costs have followed similar trends everywhere (obviously there are differences, especially in the US) and yet house prices have not followed similar trends but rather behaved differently in different places. I agree that when interest rates are lower you should expect to see higher prices, but that’s because interest rates change the price that a given income can afford. I don’t think interest rates are good at explaining the changes to affordability over time, or why affordability is different in different places.
Also, in your linked chart, you see something like 20% more dwellings per person in developed EU countries vs English-speaking countries, which doesn’t feel like no difference at all.
The issue in the article of affordability becoming worse across the US recently is probably interest rate related – prices change more slowly than interest rates, 30-year fixed rate mortgages mean rates change more slowly, and the higher rates mean existing mortgage-payers don’t want to move as they’ll lose their low rate, which reduces supply. I don’t know why prices are still up though – if interest rates being high was making housing unaffordable, one would expect prices to be down.