I stumbled upon "longislandindex" independently and then checked if it has been mentioned here and found this thread.
Long Island Index: Long Island Index
Does anyone know anything about the Rauch Foundation (rauchfoundation.org) that is behind "longislandindex"?
I also think that this site/thread should be a sticky due to the absolutely impressive amount of information gathered there and the attempt to update whenever possible: school districts - borders, density, taxes paid per child, how are your taxes calculated, potential for downtown revival, population density, demographics, income, CO2 emissions per capita, house affordability over the years... and much more - most in interactive maps.
Long Island Index: Interactive Map
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I only spent about 30min browsing - there is too much in there...
But here is a snippet of what caught my eye, and that is indirectly in response to Crooks' thread "Has LI hit the bottom of the housing market".
The site uses "affordability index" = % of houses sold for < 2.5x median income on LI.
Here are the numbers (this affordability index) for immediate areas where I am looking, but one can map the whole island:
affordability in 1997 vs. 2009
(the threshold, i.e. 2.5x median income was $171k in 1997, $254k in 2009):
Stony Brook:
43.1% vs.
3.9% (1997 vs 2009)
Setauket/E. Setauket:
36.3% vs.
3.5% (1997 vs 2009)
Those numbers apply to many other areas on LI. Of course, there are also the eternal exclusive spots (Old Field 0% vs. 0%)...
Since 2009, median income has basically remained unchanged.
I don't see many houses going around for $254k today...
Call me chicken little / little house .. whatever
, but one of the following things must happen for the housing market on LI to get more action and for house prices to stabilize and start increasing:
1) salaries must go up, a lot
2) "poor" people (households making < $150k or so) must leave the island and get replaced by an influx of eligible buyers
or...
3) ?
EDIT: Yeah, forgot one more thing - the insane increase in taxes is not even part of the equation here. "Affordability" is very much hurt by that too.