Why wouldn't people pay a premium for new over old?
Remember, it wasn't too long ago when median house prices were less than half they are today, and building costs were essentially what are they today. People still built, because a new built house sold for more than the old established house (in the same area). It was worth more beause it was new. So the argument that if prices come down 50%, no one will build makes no sense. If the median drops to $250,000, then the land component becomes worth less. Hence over time this new cost will become reflected in new land sales.
So it's not as though if established houses halve in value, new house costs will be exactly the same as today. They will decrease because the land cost would decrease. Sure, it will cost more than $250,000 to build, and so should, but in a SANE world, a new house should be worth more than an old house (in the same area).
Maybe I'm missing the point, but as far as I understand, that was the way it always was until the recent speculative boom.
Hi Martin I gave you kudos for your post on exploding the myth that property doubles in value every 7-10 years using William the conquerors domesday book and 900 years of records. The 8th wonder of the world according to Einstein is compound interest and your right most people (including me) believed the myth that property keeps doubling over the centuries.
Your point about building costs however are incorrect. Some of it has to do with GST and the onerous planning laws. We looked at building a new house in double brick in 1998 that was ahead of its time and then we revisited those same plans recently.
In 1998 the quantity surveyor estimated construction would have set us back $380,000. In 2008 the cost had ballooned out to $917,000
The cost of materials and labour had trippled in ten years due in part to the overheating of the property market.