Which method would an appraiser use to measure the area of a house?

An appraiser typically uses the exterior dimensions to measure the area of a house. This method involves assessing the overall footprint of the structure, which includes all exterior walls. By measuring from the outside of the walls, the appraiser can calculate the total square footage of the home, including all livable space. This measurement approach is particularly useful because it accounts for the complete structure, providing a more accurate representation of the property's size as it exists in relation to lot boundaries and neighboring structures.

Using interior dimensions could potentially lead to discrepancies in determining useful space since it would not adequately consider the thickness of the walls and other structural elements. Average dimensions may not accurately reflect the actual size of the house, as they provide a generalized figure rather than a specific measurement. Blueprint dimensions, while providing detailed information regarding layout and design, may not always reflect changes made during construction or renovations. Thus, exterior dimensions are favored for consistency and accuracy in appraisals.