Now there is a tool to approximate what your Coop Abatement credit should be. Of course, this may depend on your number of shares and the total number of shares in the cooperative that qualify for the abatement. But the application just assumes equal shares for all qualifying apartments. You can easily scale the number based on your particular cooperative share values. We recommend you read this document from New York City Department of Finance If you want to see other buildings, https://tax.tidalforce.org/abatement1.html#pay1 will help you compare to other buildings.
Let's take a real example:
Let's say you live at "215 EAST 74TH STREET". This is a cooperative building. You will see something like: