Who is saying that?
We don't have the capacity to build the houses and the cost of land and construction only account for about 60-70% of the total costs. Hard costs (Construction) account for 52% of total.
Property prices are determined by the Demand Curve, just like everything else.
Property development costs are determined by construction costs, land prices, development levies, Taxes, finance costs etc.
When there is increased demand for existing housing stock and new housing completions are not keeping up with demand because of multiple factors (Labour shortages, raw material inflation, delays in planning etc) then we have inflation driven by supply shor