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In the world of property valuations, there's no such thing as the "perfect" comparable sale, because it's nearly impossible for an appraiser to find an exact replica of a subject property. So when a comparable property has a feature that is not the same as the subject property, an appraiser will make an adjustment to the comparable's sale price to account for the difference. From design and architecture styles to energy efficiency, here's a look at some of the most common or costly home features that get adjusted in appraisal reports. The data, from CoreLogic, is based on a national sample of 1.3 million appraisals completed between 2012 and 2015.