Rent allocated to the actual demised space.
Measurement · US
Rent allocated to the actual demised space.
Useful for normalising across buildings with different loss factors. Convert RSF rent to USF: USF rent = RSF rent / (1 - loss factor). A 25% loss factor turns USD 100 RSF into USD 133 USF.
PSF usable (USF basis) 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.