How many years of sales history of the subject property must an appraiser analyze, according to USPAP?

According to the Uniform Standards of Professional Appraisal Practice (USPAP), an appraiser is required to analyze a minimum of three years of sales history for the subject property. This requirement ensures that the appraiser has a comprehensive understanding of the property's market behavior over time. Analyzing three years of sales history allows the appraiser to identify trends and changes in the market, which are crucial for an accurate valuation. It provides insight into how the property's value may have fluctuated due to various economic factors, neighborhood developments, or changes in buyer preferences. This extensive data analysis helps the appraiser to formulate a well-supported opinion of the property's value, ensuring compliance with professional standards and enhancing the reliability of the appraisal.