from start to finish how much time does a commercial closing take

That question cannot be answered adequately.  There are far too many variables to each closing to estimate a time frame.  Issues such as special agreements between buyer and seller, real property defects, or costs can all impact and delay closing. You should contact a local real estate attorney to discuss your unique situation, as each closing is different. This is not intended to be legal advice, and is general in its nature. No attorney-client relationship exists or is formed by this information. Furthermore, this does not represent the views or opinions of LexisNexis or its affiliated companies.