This may not be important, but just to clarify my thoughts above: if we had unlimited land then things like maximum height regulations would no longer be a prob

This may not be important, but just to clarify my thoughts above: if we had unlimited land then things like maximum height regulations would no longer be a problem. In my mind it's the combination of limited land and regulation, not just the regulation, that raises house prices. (Not meaning to disagree with you, just to clarify.)