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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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Proper Area Calculations - Condo Corporation

Sarah Thomas
Terra Firma
June 21, 2017


I've been asked to give an over all area and room areas for individual units in a Multi-Residential unit with 12 units (shared stairwells and elevator shaft). I hear this is different than a single residential unit, would someone be able to help direct me as to if I measure from center line to center line of walls (applies to both exterior (entire area) and interior (walls within the external walls)) or interior to interior other than the partially shared wall between units?

Thank you


David Fingret
Extreme Measures Inc.
June 21, 2017

Hi Sarah,

You should purchase the BOMA 2010 Multi-Res Standard from www.boma.org.


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