> So they literally built MORE houses than the increase in population! Yet it's somehow a "housing crisis".

You need to account for:

- Existing deficit

- The changing demographics, people are more likely to (prefer to) live alone putting more stress on the housing market

- The location

More young people are single and more old people prefer to live alone.

At the same time the housing crisis in Groningen might be less severe than in Amsterdam which is not visible in the nationwide numbers.

For a young single person in Amsterdam the situation will definitely feel like a crisis.

I feel like relying so much on supply is a farce if the supply is always able to be bought up by people who are already rich and able to continue owning everything by outcompeting working people. Building more has started to mean little to me if we (as in arbitrary municipalities or governing bodies) don't treat it as a special market in which people can't just buy as many as they want

What did they build more of then?