Hidden issues in a commercial property can end up costing more to fix than what the property is worth.
This is why as a CRE investor, skipping due diligence is one of the most dangerous decisions you can make.
It’s simply not worth the risk, even if you’re buying a fully leased building with a clean title report.
You just never know.
In more ways than one, due diligence protects you from unpleasant surprises that don’t surface until after closing, like encroachments on adjacent properties or unresolved liens.
It also helps you plan how to proceed, whether that means negotiating with the seller to cover repairs or even walking away altogether if the risks are far too great.
So, how do you start due diligence when buying a commercial property? We’ve put together this checklist to break down everything you need to look at.
This list will help you catch common risks, but it is not comprehensive, so it’s still prudent to work with an attorney throughout the process.
CRE Due Diligence Cheatsheet (2026)
Use this checklist to review a commercial property before closing.
Physical inspection
- Check HVAC
- Check roof
- Check plumbing
- Check ADA compliance
- Look for signs of deferred maintenance or aging systems
Financial review
- Match the rent roll to the actual bank deposits
- Review P&L, tax filings, and maintenance costs
- Check for unrecorded capital expenses
- Confirm prepaid rent and tenant deposits
Title and zoning
- Request full title report + review with title company
- Check for liens, easements, and access rights
- Verify current zoning permits the intended use
- Flag any needed variances or rezoning early
Legal documents
- Review all leases: terms, escalations, renewals, responsibilities
- Analyze service contracts: Are they assignable? Any penalties?
- Check insurance coverage + verify tenant policies are active
- Look for legal disputes, code violations, or compliance risks
Final checks before closing
- Confirm title is still clean (don’t rely only on insurance)
- Verify prorations (taxes, rent, utilities) are correct
- Compare the rent roll to the deposits one last time
- Check that nothing has changed since the last inspection
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How long is a standard due diligence window in commercial property deals?
The actual time it takes will really depend on how complex the property’s conditions and agreements are, but the average time is between 30 and 60 days.
The due diligence window in CRE is usually negotiable. Most sellers are willing to grant extensions if new issues come up.
That said, they may reject your request outright if the market is hot and other buyers are willing to waive contingencies, which is why you need to come prepared.
Having a due diligence checklist makes it easier to prioritize what you need to review first.
What should you review during preliminary legal due diligence for a commercial property?
- Walk through the property and note anything that’s broken. Look for aging systems or materials that will probably need to be prepared in the next year or two. Check the HVAC units. Have they been patched too many times? Will the roof hold through the next few years?
- Next, comb through the property’s financial records. Look at the actual rent rolls and profit and loss statements. Be sure to review service contracts and maintenance agreements, too, because they can lock you into ongoing costs the seller didn’t mention.
- Ask for the tax documents. Does the income report by the seller match what they filed with the IRS or local tax authority? Look for inconsistencies. Is tenant income not matching the rent roll? Are some of the major capital expenses not accounted for?
- Confirm that the title is clear — meaning, there are no unresolved liens or restrictions buried in prior agreements. Do the zoning rules align with the current and intended use, or will you need a variance just to operate as planned?
What should you review during site underwriting for a commercial property?
Your checklist should dig deeper into the property’s legal and financial context as you progress into the underwriting phase.
Each component tells part of the story, and you need to connect them to see what you’re really buying.
- Review everything from site surveys and architectural drawings to service agreements and warranties. How were past modifications handled? Are there any legacy agreements that might create problems?
- Run a detailed analysis of the property’s cash flow and financial stability. Check rent escalations. Are they consistent with what’s written in the lease abstracts? Look at the delinquency rates and historical operating costs as well. Does the data hold up across statements?
- Examine the property’s current insurance coverage. Read the exclusions line by line and look for coverage gaps that could land on you after closing. Then, check the leases to confirm whether tenants are meeting their insurance requirements. Don’t assume that coverage exists just because the lease says it should. If a tenant is required to carry insurance (like liability or property damage), you need actual proof that the policy is active and current. You don’t want to inherit inadequate coverage and be left exposed when something goes wrong.
- Basic inspection reports are certainly useful, but you also need to look for deferred maintenance that hasn’t been disclosed and potential ADA noncompliance that could lead to fines or force you into costly upgrades. Are there outdated systems that may require capital improvements?
- Make sure that the property isn’t tied up in legal or compliance problems. Check for easements or access restrictions that could limit how you’re allowed to renovate or use key parts of the site.
- Analyze each lease. Are tenants responsible for taxes and maintenance? Do they have renewal or termination clauses? What’s the average remaining lease term?
- Don’t take the title at face value. Ask the title company to walk you through every recorded document tied to the property, especially anything that grants rights to another party or places financial claims on the asset.
- Check whether the property’s current use is allowed under existing zoning rules. If it’s not, find out what kind of exception you’d need to keep operating. Will you need to apply for a formal variance or push through a full rezoning? If yes, how long does that process usually take in that jurisdiction? These zoning hurdles can affect everything from your financing to future renovation plans, so don’t assume it’s a formality.
Run due diligence alongside your financing process
Some newer CRE investors treat financing and due diligence as separate tracks, but this can actually slow you down or cause you to miss red flags.
It’s more prudent to evaluate the asset while working through the loan approval process to save time and prevent yourself from progressing too far into a transaction before identifying risks.
Use digital tools to manage and track the property’s documentation
Set up a shared digital folder for the deal and store all the important files there.
Some platforms allow you and your legal and financial teams to leave comments.
Are you reviewing more than one deal at a time? Label every file by property and date.
This way, you have clean and complete records when it’s time to loop in your lender or attorney.
Last checks before closing
| Does the title reflect a clean record? | Title insurance doesn’t mean there aren’t lingering easements or unresolved claims. You need written proof of resolution. |
| Does the rent roll match bank activity? | If the rent roll says that tenants are paying a certain amount, but the deposits don’t back it up, you need to find out why. Could it be that a tenant isn’t actually paying on time, or at all? Were the numbers padded to make the property look stronger than it is? |
| Are prorations calculated correctly? | You might end up paying bills that belonged to the seller
or end up missing rent that should have been credited to you. |
| Are service contracts assignable? | Some vendors require consent or have termination penalties. Know what you’re inheriting. |
| Has anything changed since your last inspection? | There could be last-minute damage made during move-out, or tenants leaving unexpectedly. |
Working through a deal?
If you want a second look at how the financing stacks up, get in touch with Private Capital Investors.
As direct lenders with decades of experience in CRE, we can help you pressure-test the numbers before you move forward.
