What of gross adjustment on an appraisal comp could be considered excessive?

An excessive gross adjustment on an appraisal comp might be considered any adjustment that exceeds 15% to 20% of the property's value. Such high adjustments can indicate that the comparable property's differences from the subject property are significant, potentially undermining the reliability of the appraisal. Additionally, if multiple adjustments are required to make a comp comparable, it could suggest that the selected comp is not truly representative of the subject property. Appraisers should aim for adjustments that are justifiable and based on market data.