“Climate change” and fossil fuels have no impact on this lol. What affects housing prices is supply and demand, and the cost of money. When money is cheap, people spend more. When there are more people wanting to buy than people selling, prices go up.
Currently Australia is importing ~300k new permanent residents per year. These people need houses to live in. We’re not building 300k houses per year, let alone in the major cities where these people want to live. More demand, not enough supply.
Fossil fuels have zero to do with this.