Originally posted by: alchemize
Originally posted by: dullard
Originally posted by: alchemize
I dunno what the real story is. I just wish Case/Shiller could be adjusted for those additional variables (higher building materials costs/higher square footage in new houses) so we could see how big or small a piece it was. Call it the Case/Shiller/Alchemize index.
Case/Shiller tracks the value OF A GIVEN HOME over time. The price of the raw materials used to build your house doesn't change over time. Suppose it took $20,000 to build your house in 1950 if you checked the data last year, then it still took $20,000 to build your house in 1950 if you check that data this year. Changing raw material prices has NO effect on the matierials already in your house.
The NAR (National Association of Realtors) tracks the value of the homes sold each month. This includes old homes (unaffected by material fluctuations) and new homes (affected by material fluctuations).
The US Census Bureau has an index that tracks the prices solely of new homes (which is affected by material fluctuations). They provide all the monthly data that you could ever want.
So, basically, all three forms of looking at the data are already out there. Why again does the Case/Shiller data need to be adjusted if you can see the NAR or Census data?
Therein lies the problem. Let's assume 10 years of data, with 10 homes built each year.
Year 1, 100 houses, average price 100K, average size 2000 sf, cost/sf = $50/sf
Year 2, 110 houses, average price 103K, average size 2000 sf, cost/sf = $51.5/sf
Year 3, 120 houses, average price 107K, average size 2000 sfcost/sf = ...
Year 4, 130 homes, average price 110K, average size 2000 sf
Year 5, 140 homes, average price 120K, average size 2000 sf, cost/sf = $60/sf
Now let's have the bubble hit, and we have sf increase, and we have increased building costs.
Year 6, 200 homes, average price 160K, average size 2200 sf, cost/sf = $72
Year 7, 240 homes, average price 200K, average size 2400 sf, cost/sf = $83
Year 8, 280 homes, average price 240K, average size 2600 sf, cost/sf = $92
Year 9, 320 homes, average price 300K, average size 2900 sf, cost/sf = $104
Year 10, 360 homes, average price 350K, average size 3300sf, cost/sf = $106
An exaggerated example, but I think this is what happened over time.
All those "old homes" prices are bouyed by the new home pricing (and factored into Case-shiller data). Eveyone wants $100 per sf for their houses cause that's what new houses get...the home prices are loaded up with bigger, newer, more expensive houses steepening the curve. Bubble pops and everything tanks...but that does that mean we're going to return to year 5 prices because nobody builds 2000sf homes much anymore? But I have read a lot about smaller houses are the new thing for builders that do have business...
Anyhow, the best quote I heard in a while is "your house is worth what your neighbors are selling theirs for".