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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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One occupant building

July 12, 2011

In Boma 1996, the exterior gross area of a one occupant building is calculated with the exterior walls of the building, without any deductions. Is there any difference in Boma 2010 ?

David Fingret
Extreme Measures Inc.
July 13, 2011


There is no gross building area calculation in the BOMA 2010 office standard. Instead, BOMA has developed a separate Gross Building Area standard known as:

Gross Areas of a Building: Standard Methods of Measurement (ANSI/BOMA Z65.3 – 2009).

The "Exterior Gross Area" according to this standard may be used for determining the lease rate in a single tenant building, but like the BOMA 1996 standard, all parties must agree.

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