Which type of depreciation is primarily the concern of an appraiser?

The correct answer is accrued depreciation, which refers to the loss in value of a property due to various factors such as physical deterioration, functional obsolescence, or external obsolescence. An appraiser focuses on accrued depreciation because it directly impacts the value of a property during the appraisal process. Understanding accrued depreciation allows the appraiser to estimate the current market value of a property appropriately by accounting for its wear and tear, outdated features, or negative external influences.

In contrast, book depreciation is more related to accounting practices and financial reporting rather than real estate appraisal. Market depreciation is a less commonly used term and does not represent a formal type of depreciation that an appraiser would analyze closely. Replacement depreciation also does not fit the context as it typically refers to the cost of replacing an asset rather than measuring the value loss of the property itself. Therefore, accrued depreciation is the crucial type of depreciation that appraisers assess to provide a reliable value estimate for properties during their evaluations.