tripper1000:
Nope. The single biggest cause of high housing cost in N.Z. is high land cost. The cause of high land cost is failure to sub-divide. The cause of failure to subdivide is 1) Nimbies, 2) pseudo-environmentalism, 3) failure of the voter to understand supply vs demand.
the other factor is council restriction of supply, but also how its planned. if you know where subdivision is restricted to then it becomes easier to landbank and charge higher prices.
without density you need more land so your land cost goes way up. also the subdivision cost goes up.
the other factor is that councils gets money from developers. that cost gets put onto the housing market. instead of the cost being spread over a large amount of people, its pushed onto one market, which in turn gets passed on to the few at the bottom who have to pay it.