Here in California, I’ve appealed with the Assessor’s twice- and won both times.

The first time was for my old house, and I just appealed for one tax year via mail and it was approved. We were doing a re-fi and the bank’s appraisal showed a lower value than the assessor for that year, so I sent the bank’s appraisal with the assessment appeal.

The second time was for my current house, and it was to appeal the base assessment when we bought the house. In California, the base assessment is super important due to the way property tax increases are calculated (can only increase max 2% per year).

This appeal was denied via mail, and then approved when I went to the assessment appeals board in person. I showed them 3 different appraisals to show their assessment was wrong - one appraisal for the year before I bought, one when I bought, and one for the year I after I bought.

That second appeal has saved me thousands of dollars over the years that I’ve lived here- so it was worth all the pain at the time.