The Map that Explains Everything

If you need to know one piece of information about that Greenburgh reassessment, study this map released by the Greenburgh Town Assessor....closely:  Assessor's Map of Reassessment Change by School District

Yep:  so much to learn, so much to infer.

Let's just summarize.  Here are the percentage change in assessments within each Greenburgh school district (I'm not listing Pocantico and Valhalla since they mostly lie outside Greenburgh).  For perspective, I'm also listing mean household income for each school district.
School District    Reassessment impact   mean household income*
Irvington:                  18.02%                   $132,270  
Hastings:                   15.68%                   $127,802
Edgemont:                  9.7%                      $184,792
Dobbs Ferry:              5.94%                    $113,804
Ardsley                      3.46%                     $141,932
Tarrytown                 -0.47%                    $  71,473
Elmsford                   -9.63%                    $  92,089
Greenburgh              -10.75%                   $  94,873

The map and the accuracy of these numbers can be questioned, however, because the properties colored in the map do not appear to include commercial and condo units.  Do the school district assessment percentages listed on the map accurately reflect the impact of reassessment on all properties or just residences within each school district?  I've asked this question and expect and answer shortly.

If the percentage changes are accurate, the numbers are troubling.  The drops in assessed values in the Elmsford and Greenburgh school districts and the large increases in Irvington, Hastings and Edgemont indicate that for decades property taxpayers in two of the least affluent school districts in Greenburgh have been subsidizing the tax burden of some of the wealthiest.  Some databases show Edgemont as the 7th wealthiest school district in New York state and among the top 10 in the United States.  Yet, two school districts with about one-half of Edgemont's mean household income have been paying its bills for years.  Proponents of phase-in want to extend this outrageous injustice for 5 more years.

The map shows increases in shades of red and decreases in shades of green.  Gives a new meaning to GREENburgh Central School District, doesn't it?

source for mean household incomes by school district: http://www.bizjournals.com/buffalo/news/2015/12/16/schoolmhi.html