Basic Commercial Real Estate Due Diligence

Due diligence is where commercial buyers earn their return or inherit someone else’s problems. The window is finite, the seller’s disclosures are thinner than residential buyers expect, and the doctrine is still fundamentally buyer beware. What follows is the core checklist experienced buyers run on nearly every commercial acquisition, and roughly the order in which to run it.

Financial verification comes first

Start by testing the numbers you based your price on. Compare the rent roll to the actual leases, the leases to the bank deposits, and the claimed expenses to invoices, tax bills, insurance declarations, utility statements, and service contracts. Ask for two to three years of operating history, not the trailing twelve months the broker package prefers. Discrepancies here are not merely accounting details – they are price renegotiation events, and finding them early preserves your leverage.

Leases and estoppels

Read every lease in full, including amendments, side letters, and guaranties. Confirm terms, escalations, options, expense responsibilities, security deposits, and any rights that constrain you as owner – purchase options, rights of first refusal, exclusive-use clauses that limit who else you can lease to. Then obtain estoppel certificates from tenants: signed statements confirming their lease terms, that rent is current, and that no disputes or undocumented agreements exist. Estoppels regularly surface the handshake deals and simmering disputes the seller forgot to mention, which is exactly why they exist.

Physical condition assessment

Commercial buildings get engineering-level review, not a residential inspection: structure, roof, mechanical and electrical systems, plumbing, fire and life safety, parking and site drainage, plus accessibility compliance – ADA deficiencies transfer to you with the deed. The report should produce a capital needs schedule with estimated costs and timing. That schedule feeds directly back into price or credits: a roof with three years left is not a discovery, it is a number.

Environmental assessment

The Phase I environmental site assessment reviews the property’s history and current condition for signs of contamination – prior industrial uses, dry cleaners, gas stations, underground storage tanks. If the Phase I flags concerns, a Phase II tests soil and groundwater. Take this sequence seriously even when the lender requires it anyway: environmental cleanup liability can attach to property owners regardless of who caused the contamination, and the Phase I performed correctly is also your qualification for innocent-purchaser defenses later. It is the cheapest insurance in the transaction.

Title, survey, and zoning

Commercial title review goes deeper than a residential glance at the commitment: easements and their locations, reciprocal access agreements, use restrictions, liens, and anything that constrains operations or financing. Pair the title work with an ALTA survey so exceptions are mapped onto the ground, then confirm zoning: permitted uses, parking ratios, signage, and whether the building’s current configuration is a legal nonconforming use that a fire or renovation could extinguish. If your business plan changes the use, verify the path before your due diligence expires, not after.

Contracts, permits, and the operational transfer

Inventory what actually transfers: service contracts you may be assuming, warranties on the roof and systems, licenses and permits the operation requires, and utility arrangements. Some service contracts have termination penalties; some warranties void on transfer unless formally assigned. Small items individually – collectively they are the difference between a smooth first ninety days and a scramble.

Insurance belongs on the list as well. Get a binder quote during due diligence, not the week of closing – commercial premiums have moved sharply in many regions, and coverage for older roofs, certain occupancies, or coastal exposure can carry conditions that change your operating budget. A building you cannot insure affordably is a building you mispriced.

Manage the clock like an asset

Order the long-lead items – Phase I, survey, condition assessment – the day your due diligence period opens. Calendar the deadline and the notice requirements for terminating or extending, in writing, exactly as the contract prescribes. If findings justify renegotiation, bring documentation, not sentiment: a capital needs schedule and an estoppel discrepancy move price; discomfort does not. And if the findings say walk, walk – the due diligence money you spent was the price of the answer, and it is always cheaper than the building that lied to you.

Work with an agent who has done this before

Due diligence is not paperwork; it is the last moment the deal is still fully negotiable. Pure Broker is built around experienced agents who already know how these transactions actually work. Find an agent who fits your situation.