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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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Single tenant gross area and rentable area

Ramon Villalba
June 29, 2021

Under BOMA 2010 a multilevel office building intended for a single tenant lease Is the interior gross area equal the rentable area and should vertical penetrations be excluded from the gross/rentable area?

David Fingret
Extreme Measures Inc.
June 29, 2021

Hi Ramon,

There are no special provisions for a single tenant office building under the BOMA 2010 office standard, so the rentable area is the same regardless. Stairwells and other Major Vertical Penetrations are excluded. However, it is common to lease a single tenant building according to the BOMA Gross Areas Standard (if all parties agree), in which case the measurement would go to the outside face of the exterior walls with no deductions. If you go in this direction, I strongly recommend obtaining a copy of the Gross Standard (latest 2018 version) in order to apply it correctly.

Also, it should be noted that if you used the latest BOMA 2017 Office Standard instead of BOMA 2010, the lowest level of Major Vertical Penetrations would be included in the rentable area.


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