Australia is again building the biggest houses in the world, after several years of shrinking, according to data commissioned by CommSec from the ABS.

The average new house built in 2019-20 was 236m2, up 2.9% on the previous year and the biggest increase in 11 years. The ACT is building the biggest houses in Australia, ahead of Victoria, New South Wales and Western Australia.

CommSec chief economist Craig James says that before last year Australia had been building progressively smaller houses on average, having lost to title of world’s biggest houses in 2013.

“Aussies had embraced units as well as smaller houses,” he says. “The size of the average house built in 2018-19 was the smallest in 17 years. While we built bigger homes in the past year, the big question is whether the decade-long downtrend has ended. And Covid may play a big role in answering that question.”

The average size of a unit also rose, up 6% over the year, hitting a decade high of 137m2.