What is the difference between fee appraisal and mass appraisal primarily based on?

The primary difference between fee appraisal and mass appraisal is based on statistical quality control. Fee appraisal typically involves an individual appraiser evaluating a property on a case-by-case basis, often incorporating detailed, subjective analysis and individualized data for that specific property. This method allows for a thorough assessment but is also prone to variability due to differing appraiser methodologies.

In contrast, mass appraisal employs statistical methods to analyze data across many properties simultaneously. By utilizing large datasets and applying statistical quality control techniques, mass appraisal aims to ensure uniformity and consistency in property valuations across a defined market area. This approach allows for the production of reliable estimates of value for numerous properties efficiently and equitably. The use of statistical controls helps maintain accuracy and helps to mitigate biases that can arise in individualized appraisals.

Understanding this difference in approach emphasizes the importance of statistical methods in mass appraisal, which seeks to apply uniformity across a large scale, thus creating a necessary distinction from the more subjective and individualized fee appraisal process.