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Assessment change by school

Per Tyler’s analysis (http://www.greenburghny.com/documents/Assessment%20Change%20Percentage%20-%20School.pdf), the change in assessment per school district was only as high as 18% for Irvington, and as low as -11% for Greenburgh. But the numbers simply don’t work out, no matter how you define “residential”:

tyler’s analysis of “residential” 1-2-3 family condo condos &
1-2-3 family
tarrytown -0.47% 12.5% 0.7% 7.2%
irvington 18.02% 28.8% -0.1% 25.0%
dobbs ferry 5.94% 20.2% 0.3% 17.8%
hastings 15.68% 29.3% -1.1% 26.0%
ardsley 3.46% 11.4% -0.5% 10.5%
edgemont 9.70% 24.4% 5.5% 22.9%
g7 -10.75% -0.5% 0.2% -0.3%
elmsford -9.63% -3.4% 9.0% -1.2%
pocantico -4.07% 15.0% -1.3% 10.1%
valhalla -1.47% 11.6% 7.8% 11.2%

Interestingly, if you take a closer look at each school district, it’s clear that the Hastings ¬†and Irvington school districts were hit particularly hard, with average increases of nearly 30%, and almost a quarter of homes increasing by 50% or more. In Irvington, 6.5% of homes saw their assessment more than double:

school district avg chg median chg % of lots that had an increase % of lots w >25% increase % of lots w >50% increase % of lots w >double increase
tarrytown 12.5% 12.5% 70.4% 30.7% 10.1% 1.5%
irvington 28.8% 23.9% 86.2% 48.9% 21.6% 6.5%
dobbs ferry 20.2% 17.9% 81.9% 37.3% 12.0% 1.2%
hastings 29.3% 28.0% 90.5% 54.5% 24.2% 4.5%
ardsley 11.4% 10.8% 78.1% 18.1% 2.9% 0.6%
edgemont 24.4% 22.8% 91.7% 45.3% 11.5% 0.8%
g7 -0.5% -0.9% 48.1% 8.8% 1.9% 0.5%
elmsford -3.4% -3.3% 43.1% 7.3% 1.4% 0.4%
pocantico 15.0% 9.3% 68.2% 24.5% 5.0% 1.4%
valhalla 11.6% 12.5% 75.8% 17.9% 2.4% 0.7%

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  1. But what are the tax increase/decrease stats? If you look at the tabluar data numbers that you corrected in the most recent post, it still appears that tax +/- increases are close to 50/50 townwide. Since the ultimate fall-out of the reassessment is supposedly tax neutral for each taxing authority, is it true, for example, that while 90% of Hastings homes will see an assessment increase, only about 50% will eventually see a post-reassessment tax increase? It would be great to see this premise verified. The tax fall out broken down by school district is really the holy grail stat of this process.