Build a shelter from the (fire)storm

Updated February 13 2020 - 12:30pm, first published February 8 2020 - 5:30am
INTEGRATED: A Norton Summit, SA, home built by ShelterSpace in 2016 has now grown an extensive garden on and around the dwelling itself.
INTEGRATED: A Norton Summit, SA, home built by ShelterSpace in 2016 has now grown an extensive garden on and around the dwelling itself.

What does the thought of an underground house bring to mind? The quaint green mounds from The Hobbit? Or Coober Pedy's pink rock dug-outs?