Just need strong regulation. All house builders want to make lots of small apartments, as that often gives a higher price per square meter of flooring. But the local government should aim for it being a mix.
The only reason it gives them a higher price per squarefoot is that building is so constrained. If there were adequate built space, the smaller apartments wolud be less desirable and maybe even go for less per square foot.
It all does come down to strong regulation, but instead of strong regulation to limit building, we should have strong regulation to prohibit hoarding and underuse of land.
It all does come down to strong regulation, but instead of strong regulation to limit building, we should have strong regulation to prohibit hoarding and underuse of land.