Hi Amy,

All 3 versions of the BOMA Office Standard allow it, but all three are different. BOMA 1996 suggests stacking the buildings in the Global Summary of Areas so they are all essentially one "Building" as far as the calculations are concerned. It's not ideal because it will often create inequities since all Complex Commmon Areas and Building Common Areas are allocated as Building Common Area across all buildings in the complex. BOMA 2010 mentions the ability to calculate Complex Common Areas but doesn't provide a methodology for doing so. After BOMA 2010 was published, BOMA did publish a Best Practices paper that goes into more detail about the methodology for calculating complexes. This was a precursor to the fully fleshed out methodology provided in BOMA 2017. I would highly recommend using Inter-Building Areas in the BOMA 2017 Office Standard to achieve Complex Common Area calculations.