Glossary

Rentable square feet (RSF)

The square footage a commercial tenant pays rent on, including a share of common areas.

Definition

RSF is usable square feet plus a pro-rata share of common areas, expressed through a load factor. Rent and expense shares are billed on RSF, while usable square feet is what the tenant actually occupies.

Example

A tenant with 4,500 usable SF and a 15% load factor pays rent on 5,175 rentable SF.

Why it matters

Two quotes at the same rate per square foot can differ materially in real cost, because one is measured on rentable area and the other on usable. The load factor is the difference, and it is negotiable at the measurement stage.

How it works in practice

State the measurement standard and the load factor in the lease, and use the same basis for rent, CAM shares, and any tenant-improvement allowance. Re-measure when the building's common areas change.

Common mistakes

Comparing a usable-area quote with a rentable-area quote, letting the load factor go unstated, and billing expense shares on a different basis than rent.

Related resources

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