If you’re interested in purchasing commercial real estate, make sure there is a due diligence period included in the contract. Not only that, but you must take advantage of this period to the fullest; you don’t want time to slip away from you. What is Due Diligence in a Real Estate Transaction? Due diligence is the period of time a buyer has to investigate the condition of the property and all the paperwork that comes with it. A seller is required to disclose any issues that may be of interest, however, they are not always known at the time, or