What is the difference between mass appraisal and single property (fee) appraisal?

When an appraiser values your property for financing or other purposes, you usually receive an appraisal consisting of three or more sales that estimate the value. The scope of work is for an individual property. This is a single property or fee appraisal. Single property appraisals are not financially or logistically feasible for tax assessment purposes.

Mass appraisal is defined by the International Association of Assessing Officers (IAAO) as “the process of valuing a group of properties as of a given date, using standard methods, employing common data, and allowing for statistical testing”. It involves analyzing data collected in mass quantities, developing statistics from the data, and applying the results to large numbers of properties. The mass appraisal method is used for tax assessment purposes and is necessary to accomplish the assessment of the thousands of parcels within a locality.

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1. What is the difference between mass appraisal and single property (fee) appraisal?
2. What should I do if I notice incorrect information on my property record card?
3. Why did I receive a Notice of Change in Assessment Letter?
4. What are some situations where property values may change outside of the General Reassessment?
5. What is a Supplemental Bill?
6. Why did I receive an Income and Expense Report Worksheet?
7. Are real estate assessments a method for the County to raise taxes?
8. Will my real estate taxes go up or down if my assessment changes?
9. How are real estate taxes calculated?
10. Where do I go to get a copy of a deed or plat?