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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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External walls in basement

Damien GANAY
Residential Plus Real Estate Services
September 9, 2015

Do we have to consider external walls (diaphragm wall) in basement in gross building area?

Adam Fingret
Extreme Measures Inc.
September 9, 2015

Hi Damien,

According to the BOMA 1996 Standard, Gross Building Area includes basements (without deduction) and measures to the outside finished surface of permanent outer building walls.

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