What to expect in tax adjustment when buying above assessed value?

[Tylere Weaver]

when looking at a property and the assessed value is less than the listing price how does one figure out what the new tax rate would be.  For example if a 5 unit is assessed for 100k and taxes are 10k a year.  The 5 unit sells for 300k would the taxes then be 30k?  

is there a metrics that one can use when performing their analysis.