The article below gives a crisp, graphical summary, while asking some good questions about how big our houses need to be and how Australian house size compares to the rest of the world.
...and hey... in this age of super-sizing...we are the biggest!
‘A smaller home requires less embodied energy to build, has lower heating and cooling needs, needs fewer furnishings, takes less time to maintain and requires less work to fund.
In terms of carbon emissions small is beautiful. But how small is too small? And how much space is enough?’