[header] How to challenge an appraisal [title] Check the appraisal for simple errors. [step] Sometimes, an appraiser might make an easy mistake, such as saying your home had two bedrooms when it really has three. This type of error can impact the entire appraisal, so give the appraisal a quick scan for these kinds of mistakes. 
[substeps] Other common errors include making a mistake on the number of bathrooms or calculating the wrong square footage. [title] Assess whether the comps are similar.