The short answer: a lot more than showing properties. On the buy side specifically, what a commercial real estate broker does breaks down into five distinct functions, each requiring a different skill set.
1. Defining the Buy Box
Before any property gets sent to a buyer, a broker should work through the actual investment parameters: property type, geography, price range, target cap rate, financing assumptions, hold period, and management appetite. This step is easy to skip, but a well-defined buy box is what lets a broker filter out 90% of available inventory and focus only on what genuinely fits.
2. Sourcing Properties — Public and Off-Market
Some inventory is on CoStar, Crexi, and LoopNet. A meaningful share isn’t — it moves through broker networks, direct owner outreach, and industry referrals. A broker’s sourcing function is only as good as their access to that second channel. See how off-market sourcing works →
3. Underwriting
Before a buyer makes an offer, a broker should be testing whether the deal’s numbers actually hold up: rebuilding the operating statement, projecting NOI, modeling financing scenarios, and stress-testing returns under downside cases. This is where a broker’s analytical rigor either adds real value or leaves a buyer relying entirely on the seller’s marketing numbers. See our underwriting approach →
4. Negotiation
Offer strategy, LOI terms, purchase contract negotiation, due diligence period scope, and closing terms. The gap between a property’s asking price and its negotiated closing price on a well-run commercial transaction is frequently larger than the broker’s fee itself.
5. Due Diligence Coordination
Once a property is under contract, a broker’s job shifts to running the clock: coordinating Phase I environmental assessments, property condition reports, lease audits, estoppel certificates, and financing timelines so nothing falls through in the final weeks before closing. See how due diligence coordination works →
What a Broker Does Not Do
A commercial real estate broker is not a substitute for an attorney, environmental consultant, property inspector, or CPA. A good broker coordinates and manages the process involving those professionals — but the actual legal review, environmental testing, and physical inspection work is performed by licensed specialists in each field.
Frequently Asked Questions
Does a commercial real estate broker charge the buyer directly? Typically no. On most transactions, the broker’s fee is paid by the seller at closing, out of the cooperating broker commission already built into the listing.
What’s the difference between what a broker does for a buyer versus a seller? For sellers, the work centers on pricing, marketing, and generating buyer interest. For buyers, it centers on sourcing suitable properties (including off-market inventory), underwriting them, and negotiating favorable terms — a meaningfully different skill set, which is why buyer representation and listing brokerage are often treated as separate disciplines.
Do I need a broker if I already found the property myself? Yes, if you want underwriting, negotiation support, and due diligence coordination — finding the property is only the first of five functions a buyer’s broker performs.