How big is the biggest house in Australia?

Answer:
Based on no official source but my years of knowledge in the high-end real estate sector, the largest home is located on Keys Rd in Flinders, Victoria. While not disclosing the precise address, I can tell you that it is three storeys (with full-size basement) and is approx 3200sqm (~350 squares or 34,445 sq ft).
First answer by ID2023187360. Last edit by ID2023187360. Question popularity: 2 [recommend question].