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This help desk is a free resource intended for discussion purposes only. Neither BOMA, its chapters, affiliates, or Extreme Measures Inc.® are responsible for the information, comments or opinions expressed herein. For complete information, refer to the official publications of the standards themselves.

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Approximate calculation of Rentable Area

Ignacio Vargas
April 15, 2021

Many of my clients request me to calculate the Rentable Area of their office suite, however they only have their floor plan and do not have access to plans of the rest floors of the building. With this information I can only calculate the Tenant Area and the Floor Service Area and I have no information to calculate the Building Service Area. I would like to know if there is any way to make an approximate calculation of the Rentable Area only with the information of a single floor (tenant area and floor area)?

David Fingret
Extreme Measures Inc.
April 16, 2021

Hi Ignacio,

There really is no way to do this. The BOMA Office Standards (since BOMA 1996) requires a full building measurement. Some of our clients will apply a pre-determined Load Factor to Occupant Areas (either a total Load Factor, Floor Allocation Ratio, or Building Allocation Ratio) but this is neither accurate or advised.


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