The actual interior area a tenant can occupy.
Measurement · US
The actual interior area a tenant can occupy.
USF excludes building common areas and is the figure used for space planning. A 30,000 RSF floor with a 25% loss factor delivers 22,500 USF. USF is the right denominator for headcount-density calculations.
Usable square feet (USF) is part of the measurement vocabulary that institutional Class A occupiers, landlords, and advisers use across US markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the US definition alongside the global standard so cross-border occupiers can translate quickly.