This article is from 2003 but if you have not considered the application of cost segregation to your building, it's worth reading.
http://www.dentaleconomics.com/display_article/165985/54/none/none/Feat/Owning-your-own-building-is-like-money-in-the-bank
Click this link for an overview of cost segregation along with an introduction to CSSI: http://cashflow.costsegserve.com/taxsavings/
Click this link for a no cost analysis for your commercial building: http://cashflow.costsegserve.com/request.html
Let me know if I can help.
Tami Simko
866.799.CSSI (2774)
cashflow@ costsegserve.com