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 inflation driven by a broken financial system (i.e. a system being artificially pumped up with cheap credit). Housing is just where the rubber hits the road and regular lives are directly effected. Just look at the tight correlation between the increase in the money supply and property prices.
For those who insist that the number of properties is inadequate, take a look at the numbers for each of the countries I mentioned in the first chart here: https://www.oecd.org/els/family/HM1-1-Housing-stock-and-cons... (Total number of dwellings per thousand inhabitants, 2022 and 2011).
This is a problem of underutilisation in my view. Too many properties are being used as investments and not as a primary residence.
Cheap credit causes an increase in demand. This is not demand for homes but additional 'artificial' demand for properties as investments. Think short term rentals, second homes, land banked properties, etc. By definition, only investment properties can be underutilised - owner occupied homes are occupied! So in an environment that encourages property investment you will see more underutilisation.
What will cause prices to fall is higher interest rates. This is what has been happening in NZ.