How is the length of a building measured?

The length of a building is measured from end wall to end wall because this method provides a precise measurement of the building's overall structure. By measuring from one exterior wall to the opposite exterior wall, the dimensions reflect the usable space and overall footprint of the building. This measurement is critical for various aspects such as zoning, construction, and property evaluation.

Measuring from roof peak to roof peak focuses on the vertical elements rather than the horizontal dimensions which do not give an accurate representation of the building’s footprint. Measuring from foundation to roof would also be inappropriate as it combines vertical and horizontal dimensions in a way that does not clarify the building's length. Finally, measuring from corner to corner would provide a diagonal measurement, which is not relevant for determining the building's length in the context of real estate and construction standards.