Posted by Jennifer M. Settles, Esq.  |  August 12, 2026

Due Diligence for Commercial Real Estate Purchases

Buying commercial real estate is one of the larger investments a business or investor will make, and unlike most purchases, you usually can’t undo it. Once you close, the property, including all of its problems, are yours. That’s what makes the due diligence period so critical. It’s the window, after you’re under contract but before you close, when you investigate exactly what you’re buying and confirm it’s worth what you agreed to pay. The buyers who get burned are almost always the ones who rushed this step or didn’t know what to look for.

Here’s a practical overview of what thorough commercial real estate due diligence covers, and why each piece matters.

Title and Ownership

Start with a fundamental question: does the seller actually own the property free of problems, and can they convey clean title? A title search and title commitment reveal liens, mortgages, easements, encroachments, and other claims that could affect your ownership or use. You generally want title insurance to protect against title defects, and you want to understand and resolve any clouds on title before closing. Buying a property with an undisclosed lien or boundary problem can cost you dearly and tie up the asset for years.

Survey and Physical Boundaries

A current survey shows you the property’s exact boundaries, the location of structures, easements, encroachments, and access points. It can reveal problems a title search alone won’t – for instance a neighbor’s fence over the line, a utility easement running through where you planned to build, or access that isn’t what you assumed. For commercial property, where precise dimensions and access can drive value and use, a reliable survey is not a formality; it’s a core piece of knowing what you’re actually buying.

Zoning and Land Use

Just because a property exists doesn’t mean you can use it the way you intend. Confirm the zoning and land-use rules that govern the property and whether your planned use is permitted. Check for any variances, conditional-use permits, or nonconforming (or “grandfathered” ) uses, and verify that existing structures comply with current codes. Discovering after closing that your intended business isn’t allowed, or that the building is out of compliance, can derail your plans entirely. Zoning verification is essential, especially if you intend to change or intensify the use.

Environmental Conditions

Environmental liability is one of the most serious risks in commercial real estate, because under certain laws a current owner can be held responsible for contamination they didn’t cause. A Phase I environmental site assessment investigates the property’s history and surroundings for potential contamination; if it flags concerns, a Phase II involves actual penetrative testing. Skipping this can mean inheriting cleanup obligations worth more than the property itself. For many commercial purchases, particularly industrial or formerly industrial sites, environmental review is indispensable.

Physical Condition and Inspections

You’re buying the building, not just the land, so its physical condition matters. A property condition assessment and appropriate inspections evaluate the structure, roof, foundation, mechanical and electrical systems, HVAC, plumbing, and overall state of repair. Deferred maintenance and aging systems translate directly into future costs, and identifying them now lets you budget, renegotiate terms, or walk away. The goal is to avoid expensive surprises that surface only after you own the building.

Leases and Existing Tenants

If the property is occupied, the leases come with it . . . and they significantly affect the property’s value. Review every lease carefully: rent, terms, expiration dates, renewal and termination rights, and any unusual provisions. An “estoppel certificate” from each tenant confirms the lease terms and that there are no outstanding disputes, while an “SNDA” addresses how tenants and lenders relate on the property. Understanding the income the property actually produces, and any tenant problems baked into it, is central to knowing what you’re buying.

Financial Verification

For income-producing property, verify the numbers the seller has represented rather than taking them at face value. Review rent rolls, operating statements, expense histories, tax records, and utility costs to confirm the property performs as claimed. The price you’re paying is usually based on the income and expenses; if those figures don’t hold up under scrutiny, the value doesn’t either. Independent verification protects you from buying a property based on optimistic or inaccurate financials.   Consider commissioning a professional appraisal.

Service Contracts and Operational Obligations

Properties come with ongoing arrangement, such as management agreements, maintenance and landscaping contracts, security, utilities, and similar service contracts. Review these to understand which obligations you’ll inherit, which you can terminate, and what they cost. You don’t want to discover after closing that you’re locked into unfavorable long-term contracts. Knowing what conveys with the property and on what terms is part of an accurate picture of ownership.

Permits, Compliance, and Government Notices

Confirm that the property has the necessary certificates of occupancy and permits, and that there are no outstanding code violations, unpaid assessments, or pending government actions like condemnation or special assessments. A property with unresolved compliance issues or looming public action can carry costs and limitations that aren’t obvious from a walkthrough. Checking with the relevant authorities helps ensure you’re not stepping into someone else’s unresolved problem.

Why the Purchase Agreement Matters

Due diligence only protects you if your contract gives you room to do it. A well-drafted purchase agreement provides an adequate due diligence period, the right to inspect and investigate, the seller’s duty to provide you with property records, and, crucially, the ability to walk away and recover your earnest money deposit if you find problems you can’t live with. It also allocates responsibility for issues that surface. The investigation and the contract work together: the diligence finds the problems, and the agreement determines what you can do about them.

The Bottom Line

Commercial real estate due diligence is methodical work – including title, survey, zoning, environmental, physical condition, leases, financials, contracts, and compliance – and each piece guards against a different expensive surprise. Because you generally can’t reverse a closing, the diligence period is your one real chance to confirm you’re getting what you’re paying for and to act on what you find. Buyers who treat it seriously, and whose contracts give them room to do so, are the ones who avoid becoming cautionary tales.

If you’re buying commercial real estate, thorough due diligence—and a purchase agreement that protects your right to do it—can save you from costly, irreversible surprises. Schedule a free consultation to make sure you know exactly what you’re buying before you close. Contact us as www.jsettleslaw.com or (602) 617-3938.

 

About the Author   Jennifer M. Settles makes business owners’ lives easier. As a fractional General Counsel with 25+ years structuring M&A deals, commercial contracts, corporate governance, and complex real estate transactions, including over two decades as lead in-house transactions counsel for major corporations, she brings big-firm firepower to the founders, dealmakers, and growing companies who need it most. Clients describe her as knowledgeable, refreshingly direct, and relentlessly focused on their best interests. Jennifer offers white-glove, direct-access service and transparent, predictable fees. Learn more or schedule a consultation.