Looks like metal window and door frames. Just a concrete corner pillar. A bit hard to tell, of course. And it looks like a concrete slab above ground level. A single brick garage wall in house on the right.
Edit. Sorry, I can see there is concrete where I thought door frame at first. I can’t tell if the house if frames with concrete, though. I am interest to see it first hand.
A West Aussie friend who now lives in Germany built his house the WA way. Caused quite a bit of interest locally.
