This sounds intuitively correct with regards to the economics of property development. I'm not a property developer though. I'm not really that concerned about their profits. I'm a young person renting an apartment in a city that is rapidly becoming unaffordable for the average Australian. The point of my post above was: If property developers are legally able to artificially constrain supply to maximise their profits, then how does all this YIMBYism actually benefit me? The main argument I hear for urban consolidation is that increasing supply lowers the cost. If this doesn't actually happen, then what's in it for us again?