I have seen commercial real estate deals fall apart during due diligence, and I have seen deals close smoothly because the buyer built in enough time and asked the right questions early. The difference usually is not luck. It is whether the due diligence period was actually used the way it was designed to be used.
Due diligence in a commercial purchase covers more ground than most first-time buyers expect. Here are the categories I walk clients through on nearly every deal.
1. Title and survey review
A title commitment tells you what liens, easements, and encumbrances are attached to the property. A survey shows you where the boundaries actually are, and whether anything, like a fence, a parking area, or a neighboring structure, encroaches on the property.
Buyers sometimes skip a new survey to save money. That is a mistake on anything other than a very simple deal. An old or nonexistent survey can hide boundary problems that are expensive to fix after closing.
2. Zoning and land use
Just because a property is being used a certain way today does not mean that use is guaranteed to continue, or that your intended use is even allowed. Zoning review confirms what the property is actually permitted to be used for under current law.
This matters even more if you plan to change the use, expand the building, or add parking. Nonconforming uses and variances can carry conditions that are not obvious from a drive-by look at the property.
3. Environmental assessment
A Phase I environmental site assessment looks at the history of the property and surrounding land for signs of contamination. Depending on what it finds, a Phase II assessment, involving actual soil or groundwater testing, may follow.
Environmental liability can attach to a current owner even when the contamination happened decades earlier under a prior owner. Skipping this step to save time is one of the costliest shortcuts a commercial buyer can take.
4. Lease and tenant review
If the property is leased, you need to actually read every lease, not just rely on a rent roll summary. Terms around renewal options, rent escalations, exclusivity clauses, and landlord obligations all affect what you are buying.
Estoppel certificates from tenants confirm that the lease terms match what the seller has represented, and that there are no undisclosed disputes or defaults. A seller who resists getting estoppels signed is telling you something worth paying attention to.
5. Financial, tax, and physical condition review
Financial due diligence means verifying historical income and expenses against actual records, not marketing summaries. Tax review includes confirming the current property tax assessment and understanding whether a sale might trigger reassessment.
Physical condition review, typically through a property condition assessment, looks at the roof, structure, mechanical systems, and any deferred maintenance. All of this takes real time to do properly, which is exactly why the due diligence period in your contract needs to be long enough. A short due diligence window is not a sign of a good deal. It is often a sign you will not have time to find the problems before you own them.
If you are negotiating a commercial purchase and want a second set of eyes on the due diligence timeline or the findings, reach out through blgattorney.com or call my Oklahoma City office. The time to find a problem is before closing, not after.