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Load Factor (Common Area Factor / Loss Factor)

The load factor is the percentage of space on a floor that is not usable, expressed as a percent of usable area, and is also called the common area factor or loss factor. BOMA-style explanations describe it as driving the conversion from usable area to rentable area through an R/U ratio relationship.

Where it applies
Generally, not specific to New York
When it comes up
Leasing; underwriting; rent roll modeling
Property types
Office (primary)

In practice

- Load factor can vary by floor and by building; using a single "building-wide" load factor can misstate tenant economics in multi-floor analyses.

Related terms

Common AreaRSF/USFRentable AreaUsable Arearentable arearentable/usable ratio (R/U)usable area