Statistics are one thing.... individual realities are another. Taking different generations into same statistics makes it even worse.

Can an average young couple earning average pay in norway afford to buy a house/apartment there? Preferably large enough to have space for let's say 2-3 kids and young enough to actually have 2-3 kids (for demographic reasons)?

I live in a small country that used to be a part of a larger communist one, and our homeownership situation seems great, very high percentage of people own their homes, but the reality for young people is, that unless we do some drastic changes soon, buying a home will be impossible for a majority of them, and waiting to inherit their parents' apartment will take too long (demographic-wise... you can't really have kids in a 2 bedroom apartment with 3 roommates).