How Much Due Diligence Should I Do Before Making an Offer?

How Much Due Diligence Should I Do Before Making an Offer?

Before making an offer on a commercial property, you should do enough due diligence to understand the asset, price the risk, and avoid making an offer you cannot support later. You do not need every document before an initial offer, but you do need enough information to know whether the deal is real, whether the pricing logic makes sense, and what must be verified before contract or closing.

In New York City commercial real estate, due diligence is not one item on a checklist. It is a process. Ownership, income, leases, expenses, real estate taxes, zoning, violations, physical condition, environmental risk, financing, and title can all change value. A serious buyer should identify the major questions early and separate assumptions from verified facts.

The first layer: verify the deal itself

Before spending time on detailed underwriting, confirm the basics. Who owns the property? Who has authority to discuss it? Is the person presenting the opportunity connected to ownership? Is the seller actually willing to transact? Is the asking price current? Is there a clear process for NDA, information release, LOI, contract, diligence, deposit, and closing?

This is especially important in off-market investment sales. A private opportunity can be legitimate, but it still needs a clean channel of communication. Skyline Properties’ approach is built around owner discretion, qualified buyers, and controlled exposure because a real off-market process should reduce chaos, not create it.

The second layer: underwrite the numbers

• Rent roll: tenant names, rents, lease expirations, reimbursements, free rent, arrears, security deposits, and renewal options.

• Income: actual income, stabilized income, upside income, and any seller adjustments that need proof.

• Expenses: taxes, insurance, repairs, utilities, management, payroll, reserves, and any expenses being excluded.

• NOI: actual net operating income versus projected net operating income.

• Financing: debt availability, interest-rate sensitivity, DSCR, lender assumptions, and closing certainty.

The third layer: property-level risk

A buyer should review physical condition, building systems, façade issues, roof condition, elevators, mechanical systems, code violations, open permits, environmental concerns, and any capital work that could affect ownership cost. A building can look strong on income and still require significant capital after closing.

Zoning and legal use also matter. The buyer should understand what the asset is, what it can legally be used for, whether there is excess development potential, whether a conversion is realistic, and whether any approvals or agency issues could affect the investment plan.

What can wait until after an LOI?

Not every detail must be resolved before an initial offer. In many commercial deals, the offer is based on available information plus assumptions that will be tested during due diligence. The key is to make those assumptions clear. If the offer assumes a certain NOI, tax treatment, lease reimbursement, building condition, or vacancy profile, the buyer should say so directly.

A clean LOI can preserve credibility by explaining what the buyer is relying on and what needs to be confirmed. That helps the seller understand whether the offer is serious and whether the buyer has a realistic path to closing.

Off-market due diligence requires discretion

In a public listing process, a large amount of information may be distributed to many buyers. In an off-market process, the information flow is usually more controlled. That does not mean the buyer should accept weak information. It means the buyer and seller need a structured process where confidentiality is respected and real diligence happens at the right stage.

For the broader process, read Manhattan’s Off-Market Investment Sales Authority, How Do I Know If a Commercial Deal Is Legitimate?, and What's a Letter of Intent (LOI) and Do I Need One?.

FAQ

Can I make an offer before seeing all documents?

Yes, but the offer should clearly state its assumptions and required diligence. A buyer can make a serious offer before seeing every document if the major risks are identified and the diligence process is defined.

What due diligence matters most?

Ownership authority, income, leases, expenses, taxes, building condition, zoning, violations, financing, title, and environmental issues are usually the most important categories.

Why does due diligence matter in off-market deals?

Because access is private and information is controlled, both sides need a clear process. The buyer must verify facts, and the owner must avoid unnecessary exposure to unqualified buyers.

Important note: This article is general information only and is not legal, tax, financing, zoning, engineering, brokerage-agency, or investment advice. Every transaction requires separate professional review.