An escaped assessment is value that should have been on a prior roll and is billed later. An addition the county missed is the usual example of that catch-up.
An escaped assessment is California's name, also used in a few other states, for value that should have been on a prior roll and is billed later. Other states say omitted assessment for the same catch-up. An addition the county missed is the usual example.
What is an escaped assessment versus a regular roll increase?
The IAAO glossary defines an omitted assessment as an assessment made after the close of a tax year on property that was legally assessable but was not listed, and notes it is also called omitted property. Escaped assessment is the same idea in local stamps: the value got away from that year's roll. A regular increase is the county rewriting a number that was already on the list.
Example: a $50,000 addition missed in the year it was built, then billed later. Ten mills on that $50,000 is $500 of catch-up tax. That pairing is an example of the missed line, not a back-tax schedule.
Look up if you are overpaying.
Is an escaped assessment the same as a property tax appeal?
No. An escaped assessment is the county adding value that never made the earlier roll. A property tax appeal is a request that a printed number come down. The catch-up line can still be the print a later filing would target. The property tax glossary keeps omitted value next to new construction. FairAppeal handles the entire appeal on your behalf when a filing goes forward, and there are no upfront costs with Fair Appeal.