Final answer:
Appraisers measure house area using net rentable area to determine usable space and standardize property valuation.
Explanation:
An appraiser measuring the area of a house would use the net rentable area. This metric helps determine the rentable space within a property, excluding factors like walls and columns.
By focusing on the net rentable area, appraisers can accurately assess the value of a property by considering the usable space available for tenants or buyers.
Utilizing the net rentable area ensures a standardized method for property valuation across different real estate listings.
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