Commercial real estate due diligence checklist

Free and printable · last reviewed 2026-08-19

Commercial real estate due diligence is the investigation a buyer performs before becoming irrevocably committed to a purchase. You are comparing the property against the seller's materials, and separately examining risks those materials do not address. In most transactions the bulk of the work happens after the purchase agreement is signed and a deposit is posted, which is why the contingency deadlines in your agreement, rather than the closing date, are what actually govern it. Some obligations continue after you own the property.

The work is not a single ordered procedure. This page organizes it into four tracks that run in parallel, on different clocks, any one of which can change what you are willing to pay or whether you proceed: the income, the physical asset, title and entitlements, and environmental exposure. What follows is the generic framework that applies to any commercial property, then the property-type checklists covering the items most likely to change price, timing, or scope.

Start with your property type

Diligence is not interchangeable across property types. A multifamily rent roll and a manufactured housing community rent roll call for different checks, and so do self storage and RV park deals. Pick the closest match.

Where to start with the documents

Ask for the whole package at once. Start by reconciling the records that show how revenue is earned and collected, and in parallel check the records that establish the property's legal right to operate and its compliance history. Public-record requests and the professional work with long lead times can proceed alongside both, which is why the four tracks below run on their own clocks rather than in sequence.

Which records carry the revenue depends on the property type, and so does how early the operating approvals matter.

• Mobile home park. Start with twelve months of bank statements alongside the monthly operating statements, a site rent roll that tags every lot as tenant-owned, park-owned rental, or under a purchase contract, and every site lease and home note with its payment history. On the operating and compliance side, the operating license with its licensed site count, the approved site plan, and the permits, testing records, and compliance history for every utility system the park runs itself.
• RV park. Start with reservation-system exports showing revenue by stay type, bank deposit records, and the forward-booking calendar with the deposit-liability ledger. On the operating and compliance side, the campground license and every health permit, the water and wastewater permits with their inspection records, the ordinances and approvals governing stay limits, and the lodging-tax filing history.
• Self-storage. Start with the unit-level management-system export, rate-change logs and delinquency aging, twelve to twenty-four months of bank statements, and a sample of executed rental agreements. On the operating and compliance side, the zoning verification letter, the certificates of occupancy, the permit history, and two years of lien-sale files for counsel to test against current state law.
• Multifamily. Start with the monthly operating statements for the trailing twelve months, the current rent roll, one to two years of bank statements, and every signed lease file with its amendments and addenda. On the operating and compliance side, the certificate of occupancy, or whatever record your jurisdiction uses to establish the legal unit count.

Each checklist above carries the full request and the checks attached to every record in it.

What to ask for, whatever the property type

These sit behind every one of the lists above. The order below is not a sequence to work through, because which of them decides your price varies with the deal.

• Trailing twelve months of operating statements. Monthly, not annual. An annual summary can hide the month a large one-time cost landed or an expense was reclassified.
• The rent roll or its equivalent, dated and certified by the seller. A rent roll is a point-in-time schedule of contractual rent, while an operating statement covers a historical period and may reflect vacancy, concessions, bad debt, and other income. The two are not expected to match. The work is explaining the difference, and a gap nobody can explain is the finding. Where revenue is nightly or month to month, the equivalent record is the reservation or management-system export rather than a roll.
• Bank statements or deposit records. These corroborate what was actually received rather than what was billed. Read them carefully: deposits can include non-rent receipts, transfers, owner contributions, and funds from other properties, so they support the income figure rather than settle it alone.
• The leases, resident or rental agreements, and reservation records that govern occupancy. Read each governing form with its amendments or change notices, since those can alter terms the form appears to settle, and concessions and side agreements often live there. Where hundreds of substantially identical forms are in use, read the current form, then sample executed files for departures from it.
• Tax bills, insurance policies, and utility bills. These are among the costs most likely to differ from the seller's figures once you own the property. Whether a sale triggers a property tax reassessment is jurisdiction-specific, so confirm the rule where the property sits.
• Existing title, survey, and environmental reports, then the current work. Request whatever already exists on day one. Treat it as preliminary until the professionals involved, your title insurer, and your lender tell you whether it can be updated, recertified, or relied on as it stands. Sometimes it can, which saves real time and money; where it cannot, commission the current title commitment, survey, and environmental work in its place. Either way these carry the longest lead times and the least negotiable findings, so settle the question in the first days rather than discovering late that you need a report nobody started.
• Service contracts, permits, and any open code violations. Treatment varies: some contracts are assignable, some require consent, some terminate on sale, and some obligations attach to the property regardless of who owns it. Establish which applies to each one rather than assuming a single rule.

The four diligence tracks

Financial

Reconstruct income and expenses from source documents rather than accepting the summary. Properly classified capital expenditure is normally excluded from operating expenses, so the question is not whether it appears in net operating income but whether recurring costs were misclassified as capital, and whether you have funded the capital plan you are inheriting. Reconcile the rent roll, the operating statement, and the bank records against each other, and treat any difference as unexplained until someone explains it.

Physical

A property condition assessment estimates the remaining useful life of major systems and near-term capital needs, within the scope you set and based on what could be observed and what records existed. Those are estimates, not measurements. Buried infrastructure such as sewer laterals, water lines, and electrical distribution is harder to observe and often sits outside a standard scope, so it can carry risk the report does not price. A specialized scope, for example a sewer camera survey, can investigate parts of it.

Title, zoning, and entitlements

A title commitment sets out the terms on which an insurer will issue a policy, including its requirements and its exceptions. A survey shows boundaries and the matters disclosed to the surveyor, which is how you find that an easement crosses the area you intended to build on. Neither is a guaranteed inventory of every interest in the property, and unrecorded interests may not appear in either.

Zoning determines whether the current use is permitted, and if it is not, whether it is legally nonconforming. Nonconforming-use rules vary by jurisdiction, including how long a use may lapse before protection is lost, what happens after a casualty, and the effect of a transfer. Ask the municipality in writing, but treat the response as a starting point rather than a legal determination, since a zoning letter often carries its own limitations. This is a point to involve counsel licensed where the property sits.

Environmental

A Phase I environmental site assessment is a records and site review that identifies recognized environmental conditions. If it finds one, the environmental professional may recommend further investigation, which commonly involves sampling and is generally called a Phase II. That is not automatic: whether it happens depends on the buyer, the lender, counsel, and how the contract allocates risk.

The reason to start early is the branch rather than the report. Further investigation adds time and cost, and you want that decision inside your diligence window rather than at the end of it. Note that under United States federal law an owner can face environmental liability without having caused the contamination. A Phase I performed to the applicable all appropriate inquiries standard can support a statutory defense, but those protections are conditional and can carry continuing obligations after you buy, so treat the report as part of a liability strategy rather than as proof that nothing transfers.

Who is responsible for what

Diligence involves several parties whose interests only partly overlap with yours, and assuming someone else has covered an item is how gaps happen.

• You own the financial work and the decision. Nobody else in the transaction owns your return assumptions.
• The title company reports what its search discloses and the terms of the policy it will issue. It does not interpret what those items mean for your business plan.
• Your lender may order an appraisal and its own environmental review, but those serve the lender's collateral position, not your return assumptions. Their approval answers their question, not yours.
• Third-party inspectors answer the question you asked. The scope you set determines what they look at, so a narrow scope produces a clean report that means less than it appears to.
• The seller and broker supply the documents. Treat every figure they provide as a claim, and compare it with the underlying record before you use it.

The dates that actually bind

Diligence is governed by the contract calendar, and a check matters only if it finishes before the deadline it informs. Read the agreement and list every date it contains. Depending on the contract these can include document delivery, an inspection or termination deadline, title and survey objection and seller cure periods, estoppel delivery, zoning review, financing milestones where a financing contingency exists, the point at which a deposit becomes non-refundable, and closing. Work backward from them, and order the long-lead items, meaning title, survey, environmental, and municipal responses, in the first days rather than when you reach that section of the list.

Where a diligence item cannot be completed in time, the ways forward are negotiated rather than unilateral. Depending on the agreement and the other side, they can include an extension, a price adjustment, a holdback at closing, or terminating where the contract permits it. Knowing which outcomes you would accept before you need to choose is what keeps a deadline from deciding for you.

This page is general information for buyers, not legal, tax, or investment advice, and not an appraisal. Requirements and outcomes vary by state, municipality, lender, and the terms of your specific contract. Confirm anything consequential with professionals qualified in the relevant jurisdiction.

On Pro, the full diligence library for the property types CREscope covers today (Multifamily, Manufactured Housing Community, RV Park / Campground, Self-Storage), with per-deal tracking, lives inside CREscope.