The Complete CRE Due Diligence Checklist

Physical due diligence confirms the condition of the building systems, structure, and site before a sponsor is financially committed to what the seller represents. A property condition assessment from a licensed engineer typically covers the roof, structural elements, mechanical, electrical, and plumbing systems, the building envelope, and site improvements like parking and drainage, and flags both immediate repairs and capital items likely needed over the hold period.

As an illustration, a property condition assessment on a 150-unit apartment building might identify $400,000 in immediate repairs, such as a failing roof section and deferred boiler maintenance, plus $1,200,000 in capital needs over the next ten years. Both figures belong in the underwriting, the immediate repairs in the renovation budget and the longer-term items in a reserve schedule.

Financial due diligence tests whether the trailing income and expenses the seller reports actually match the property's operating reality. Request at least two to three years of trailing financials, current rent roll, accounts receivable aging, and bank statements, then reconcile the rent roll against actual deposits rather than accepting reported collections at face value.

Expense review matters as much as income. Compare reported operating expenses against market benchmarks for the asset class and market, since an unusually low expense ratio often means deferred maintenance or underfunded management, not genuine efficiency. Verify real estate tax assessments separately, since a sale often triggers a reassessment that changes the going-forward expense line.

Legal and title review confirms that the seller can actually convey what the purchase and sale agreement describes, free of undisclosed claims. A title commitment and survey identify easements, encroachments, liens, and any exceptions that could restrict use or financing, and legal counsel should review the purchase agreement, any existing loan documents being assumed, and organizational documents for the buying entity.

Pending or threatened litigation involving the property, prior owners, or major tenants deserves specific attention, since an undisclosed lawsuit can attach to the property or complicate a lender's title insurance. A sponsor should also confirm there are no open code violations, municipal liens, or unpaid special assessments that transfer with the property at closing, since these rarely show up in a standard title search alone.

Environmental due diligence protects a sponsor from inheriting contamination liability that can attach to a property regardless of who actually caused it. A Phase I Environmental Site Assessment reviews historical use, adjacent properties, and regulatory records to identify recognized environmental conditions, and typically takes two to three weeks to complete once ordered.

If the Phase I identifies a recognized environmental condition, such as a former dry cleaner or gas station on or near the site, a Phase II assessment with soil or groundwater sampling follows before closing. Skipping environmental review on an older industrial or commercial building because the current use looks clean is one of the more expensive diligence shortcuts a sponsor can take.

Zoning review confirms that the current use is legally permitted and that any planned renovation, expansion, or change of use is achievable under the existing zoning or a realistic entitlement path. A zoning report or letter from the municipality should confirm the property's zoning district, permitted uses, and whether the current improvements comply or exist as a legal nonconforming use.

A legal nonconforming use matters most when the plan involves substantial renovation, since many municipalities require a nonconforming structure to be rebuilt to current code if damaged or altered beyond a stated threshold. Confirming parking ratios, height and density limits, and any pending zoning changes in the area rounds out the review before the plan is finalized.

Tenant and lease review confirms that the income the rent roll shows is actually collectible and that the leases do not carry terms that limit the property's value or the buyer's flexibility. Pull each lease, or at minimum the leases for the largest tenants, and confirm the rent, term, renewal options, and any concessions match what the rent roll reports.

Estoppel certificates, signed by tenants confirming the lease terms and that the landlord is not in default, are standard closing conditions on any deal with material commercial leases. Watch for co-tenancy clauses, exclusive use provisions, early termination rights, and below-market renewal options, since any of these can change the property's actual stabilized value even when the current rent roll looks strong.

Market due diligence tests whether the deal's assumptions about rent growth, absorption, and exit value hold up against what is actually happening in the submarket, not just the broker's marketing package. Pull comparable sales and lease transactions from the last 12 months, and review submarket vacancy, absorption, and new supply under construction or planned.

New supply deserves particular attention on a value-add or lease-up deal, since a wave of competing renovated units delivering during the hold period can slow lease-up and cap rent growth regardless of how strong the subject property's plan is. A sponsor who underwrites rent growth without checking the supply pipeline is underwriting against an incomplete picture.

Insurance review confirms both the cost of insuring the property going forward and whether the property carries any risk, such as flood zone location or prior claims history, that could affect insurability or pricing. Request the seller's current insurance policy, loss run history for the last three to five years, and a flood zone determination.

A property with a significant claims history or located in a high-risk flood or wind zone can carry materially higher insurance costs than the seller's current policy reflects, especially if that policy was placed years ago at a lower rate environment. Get a forward-looking insurance quote before finalizing the operating budget, not after closing.

A well-organized data room turns due diligence from a scramble into a checklist, and it is what a lender's underwriting team and legal counsel will actually use to move quickly. Structure it by category, physical, financial, legal, environmental, zoning, leases, market, and insurance, with a consistent file-naming convention and an index a reviewer can scan in minutes.

Keep the data room current as new documents arrive rather than dumping everything at the end, and flag any missing or outstanding items explicitly so a lender or investor knows what is still coming rather than assuming an item was overlooked. A data room that is easy to navigate signals a sponsor who runs a disciplined process, which matters to anyone underwriting the deal.

The most common mistake is treating due diligence as a formality to complete rather than a genuine test of the deal, which leads sponsors to skip categories that feel low-risk, like environmental or zoning review, on properties where nothing looks obviously wrong. A second is waiting until diligence deadlines are nearly expired to order reports that take weeks, like a Phase I or a property condition assessment, compressing the timeline to review the results.

A third mistake is accepting the seller's financials at face value instead of reconciling the rent roll against bank deposits and benchmarking expenses. A fourth is failing to organize the data room, which slows down the lender's underwriting team and can push back a closing date that was otherwise on schedule.

H Equities evaluates and structures first mortgage bridge loans from $5 million to $50 million, interest-only, with terms typically 12 to 24 months, nationwide, and reviews a sponsor's due diligence package as part of its own underwriting. Sponsors bring in H Equities once physical, financial, legal, and environmental diligence are far enough along to support a term sheet, particularly on acquisitions, value-add repositioning, or deals where mezzanine debt, preferred equity, or co-GP equity is needed alongside the senior loan.