Author: Taxduck(Taxicorn)Taxicorn 25 Feb 2026
Guidelines on this scenario is in link below. As stated in link, to be CGT exempt you need to
"move into the dwelling as soon as practicable after it is finished and continue to use it as your main residence for at least 3 months".
You also need to move in within 4 years of demolishing your dwelling.
Building or renovating your home | Australian Taxation Office
So answer is no. CGT would be on that period of time after it has been demolished. (i.e. it was not your main residence). If you move out and the dwelling is vacant (or rented) then this period may still be counted as main residence days. This rule is below
Treating former home as main residence | Australian Taxation Office