Usable Vs. Rentable Square Feet

As a Tenant Representation Broker one of the most common questions we get it why does the space measure smaller that the square footage the are telling me the space is on the floorplan.  Rent is quoted in terms of rentable, not usable square footage. The rentable area of virtually every office unit includes a portion of square footage that is used a part of the common area of the office building, for which the tenant is charged rent.

Here are the definitions:

Usable Square Feet (USF) – The area contained within the demising walls of the tenant space, i.e., the space you occupy. 

Rentable Square Feet (RSF) – Equals the usable square footage plus the tenant’s pro-rata share of the Building Common Areas, such as the lobby, public corridors, and restrooms. 

The percentage difference between the rentable and usable area is known as the Add On Factor (it has other names, too). There are exact standards for determining the add on factor in office buildings. It is expressed as a percentage, which can then be applied to the usable square footage to determine the rentable square footage upon which the tenant will pay rent.
It is always important to read the fine print in proposals and leases and this is exactly why is it important to have a Tenant Rep broker on your side when finding a new office or renewing your lease.
SwiftLease agents are experts in helping small business locate and lease office space throughout Texas.  No client is too small for us!  Give an agent a call today at 713-623-2487 or e-mail She is the Director of Leasing and can start helping you in your search today.