How is gross square feet usually measured?

Gross square feet is typically measured from the exterior walls of a building, and this measurement includes all vertical penetrations, such as stairwells and elevator shafts. This method provides a comprehensive view of the total area within the building's footprint and is critical for various purposes, including zoning regulations, building codes, and financial assessments.

This measurement approach captures the full space available in a building and is more representative of the total usable area versus just the livable space. By including vertical penetrations, it accounts for spaces that may not be directly usable for occupancy but contribute to the overall size and spatial configurations of the building. Thus, this method allows stakeholders to assess and manage properties more effectively in real estate development contexts.