[QuarterReptile]

How much more housing? More housing is being built.

Average house size has increased significantly over time. Average household size trends broadly downward, with rare counterexamples.

When is "better" also "more"? Because better costs more, just like more area costs more. What resources should be redirected from quality to quantity?

[dukeyukey]

Definitely hasn't increased everywhere. UK house sizes are actually decreasing over time, down to an average of ~800sqft.