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I would like to know how you come up with your valuations

In October my home was valued at $150,000.  Last week it was valued at $139,000 now you have it a$128,000.  I wouldlike to know how this valuation is done since my tax aassessment based on local homes is increasing to $145,000 this year.  What is the disconnect?

I would like to know what homes have been used for this valuation.
 
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May 30 2012 - Staten Island
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Answers (1)

Profile picture for Pasadenan
Tax assessments are only done once per year, and based on taxing needs.

The Zestimates are calculated nominally 3 times per week based on any new non-distressed ownership sales in the same county that came in from the data providers.

How?
See the FAQ:
"what is a Zestimate"

It is not an "appraisal" and has a fairly wide tolerance margin.  See the tolerance data for your county (calculated at the end of each quarter year):
About Zestimates

For the homes that have been used in the calculations, use the
homes tab at the top of the page,
type in your county name,
set the more filters to "recently sold", clear the multi-family, vacant lots., forclosure, for sale, make me move, by owner...
set the time on Zillow to 3 months.
That should give you most of the ones used in the calculations, but you still will need to manually excluded the distressed sales yourself.

Those that are closer geographically are weighted heavier than the ones on the opposite side of the county.
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May 30 2012
 
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