While it’s common for homeowners or homebuyers to disagree with the home value determined by a professional appraisal, it’s not particularly common for appraisers to change their opinion of value. For example, a homeowner can write a letter of appeal to the lender, who can then file an official Value Dispute. The Value Dispute is sent to the AMC to make the appeal to the appraiser. Providing alternate recent closed sales or any factual errors could support a chance to increase the value. However, the appraiser would have to justify why their opinion of value was changed. So, while it is possible to dispute an appraisal, more often than not, a report remains unchanged unless there is concrete proof of an error in the appraisal report.