The Open House Trap: Why Buying Through the Listing Agent Could Cost You a Fortune

There's a scenario that plays out every weekend across California, and it costs unsuspecting homebuyers tens of thousands — sometimes hundreds of thousands — of dollars. A buyer walks into an open house, falls in love with a property, and thinks, Why not just make an offer right here? The agent is already here. This will be easy.

What happens next is rarely easy, and it's almost never in the buyer's favor.

As a mortgage professional at LoansByEmmett.com, I've seen this pattern repeat itself more times than I can count. I've watched good, hardworking people overpay significantly for homes — and then get steered into overpriced financing on top of it — simply because they didn't understand one fundamental truth: the listing agent works for the seller, not for you.

This is not a knock on listing agents as people. Many of them are skilled professionals doing exactly what they're paid to do: get their seller client the highest possible price, the best possible terms, and the fastest possible close. The problem arises when that same agent also volunteers to "help" you write your offer. At that moment, their loyalty — legally and financially — does not shift. It cannot. And yet many buyers don't realize that until the damage is already done.

Two Real Deals That Reveal the Truth

Let me share two situations I witnessed firsthand. I'm not using names, but these are real transactions that happened to real people I worked with.

Case #1: The $230,000 Overpay

A borrower came to me after he'd already gotten into contract on a home. He had gone to an open house, connected with the listing agent, and allowed that agent to write his offer. The home was listed at $1,350,000.

By the time the agent was done "helping" him, he was in contract at $1,580,000 — a $230,000 premium over list price. Now, in certain competitive markets, paying over asking is sometimes necessary. But here's what troubled me most: there was no independent verification that a bidding war was even real. The buyer was told other offers were coming in. He was told he needed to act fast and go high to "win." He trusted the agent who was, in theory, helping him.

Then came the second blow: that same agent pushed him toward the seller's preferred lender. When I looked at the rate that lender was offering compared to what I had published that same day on LoansByEmmett.com, the buyer had been quoted a rate a full 0.5% higher than what was available to him. On a $1.58 million loan, even at the conforming/jumbo threshold, that rate difference translates into thousands of dollars per year — and over the life of a 30-year loan, we're talking about potentially $80,000 to $100,000 or more in excess interest paid.

He was walked into a contract at an inflated price, and then walked into a loan at an inflated rate — all in one transaction, all through one agent who was supposed to be "helping" him.

Case #2: The Condo Deal That Almost Went Wrong

In the second situation, a long-time client of mine was purchasing a condo. He went directly to the listing agent, who told him there was another offer already on the table. Feeling the pressure of the artificial deadline, my client agreed to a higher purchase price than he had originally planned — believing he was locked in a competitive situation and needed to outbid a phantom rival.

But the financial ambush didn't stop at the purchase price. The listing agent had my client sign a buyer representation agreement charging 3% commission, despite the fact that the seller had only agreed to pay 2% toward the buyer's agent fee. That gap — that 1% — was quietly offloaded onto my buyer as his personal obligation.

On a condo purchase, 1% might represent $5,000, $8,000, or more. It wasn't disclosed upfront in plain language. It was buried in paperwork presented at a high-pressure moment.

Fortunately, because we had worked together multiple times before, my client called me. I walked him through the numbers and the contract language. Once he saw clearly how he had been set up, he cancelled the contract and walked away. He later found a comparable property with his own representation, at a fair market price, with clean terms — and a rate I was proud to give him.

Not every buyer gets that call in time.

What the Research Says

What I've witnessed in practice is backed by serious academic and consumer research.

The Consumer Federation of America (CFA) conducted a landmark study examining more than 6,000 home sale transactions across twelve major U.S. cities. Their findings were striking: they estimated that approximately 10% of all home sales nationwide involve dual agency, and that in those transactions, buyers and sellers are collectively overcharged by several billion dollars annually in commissions alone — before even accounting for inflated sale prices.

The CFA was direct in its conclusion: "Dual agency is an oxymoron. One agent cannot represent the material interests of both seller and buyer, especially related to sale price." Their report also noted that the prospect of double-ending a deal can motivate agents to steer buyers toward their own listings, discourage due diligence, and apply pressure tactics designed to close the deal — not to protect the buyer.

Separate academic research has found that homes sold through dual-agency arrangements often close at a discount compared to what truly competitive arm's-length transactions produce for sellers. Pre-disclosure studies found dual agency correlated with sale prices approximately 8% lower than comparable non-dual agency sales — meaning sellers were leaving money on the table too, while the agent pocketed both sides of the commission.

A Bankrate analysis echoed what I've seen in practice: real estate agent commissions are based on a percentage of the final sale price, meaning agents are inherently "incentivized to bid up the sale price" in their role representing sellers. When that same agent is purporting to help a buyer, their financial incentive has not changed — it has only become more concentrated.

Rocket Mortgage's analysis put it plainly: "The dual agent will be interested in closing the deal without too much concern over the negotiation details." Why? Because they collect both sides of the commission regardless of whether you as the buyer got a fair deal.

The Mechanics of the Open House Trap

Here's how this plays out structurally, and why it's so easy for buyers to fall into.

You walk into an open house on a Saturday afternoon. You're emotionally engaged with the property. The listing agent is friendly, knowledgeable about the home, and offers to write up an offer for you right there. You don't have your own agent. It feels efficient.

The listing agent — in most cases a genuinely nice person — now faces a powerful financial incentive: if they can get you into contract without involving a buyer's agent, they keep both sides of the commission. Instead of earning 2.5–3% from the seller, they stand to earn 5–6% total, or some version close to that. On a $1.35 million property, that's roughly the difference between $37,500 and $75,000 in their pocket.

At that moment, the listing agent may:

• Create urgency around competing offers — real or fabricated — to rush your decision-making
• Discourage you from doing full due diligence or taking time to consult an independent advisor
• Present inflated price benchmarks to justify you paying over asking when the market doesn't require it
• Steer you toward their preferred lender — often an in-house lender or affiliated partner — where rates and fees may be far less competitive than what you'd find independently
• Present a buyer representation agreement with terms that obligate you to pay fees the seller was never going to cover

None of these behaviors require the agent to be malicious. The structure of dual agency creates incentives that naturally push toward these outcomes, even when the agent believes they're being fair.

As legal experts at Schorr Law, a California real estate firm, have noted: "It is hard to see how a real estate agent can truly represent the best interests of both parties during negotiations." The agent who knows the seller needs a fast close, who knows the seller's bottom line, and who is being paid a percentage of your purchase price is not — structurally, legally, or financially — in a position to fight for you.

The Lender Steering Problem

One dimension of this issue that rarely gets discussed is what happens after the purchase price negotiation: the financing.

In both of the cases I described above, the listing agent directed the buyer toward a specific lender. This is not an accident. Many listing agents have financial relationships — referral arrangements, affiliated business arrangements, or simply professional loyalty — with certain mortgage lenders. When a buyer comes in unrepresented and the agent controls the transaction, suggesting a preferred lender is a natural next step.

The problem is that "preferred" does not mean "best for you." In the first case I described, the rate differential alone was 0.5%. That may sound small, but consider the math. On a $1.5 million loan at a 0.5% rate premium:

• That's roughly $7,500 more per year in interest
• Over 30 years, assuming the loan is held, that's approximately $225,000 in excess interest paid

This is why I publish my rates openly and publicly at LoansByEmmett.com. Transparency matters. When a buyer has their own mortgage professional — someone with no relationship to the listing agent, no stake in which property you buy or at what price — they have an independent check on what's being offered. If the rate you're being quoted is higher than published market rates that day, you deserve to know that before you sign.

California Law and the Dual Agency Problem

California is one of many states that allows dual agency, provided both parties sign a written disclosure form acknowledging the arrangement. The required form is called the Disclosure Regarding Real Estate Agency Relationships, prescribed under California Civil Code § 2079.16.

In theory, this disclosure protects buyers by ensuring they understand who the agent works for. In practice, this form is often presented at the last moment before an offer is written, under emotional pressure, and in language that is dense enough that most buyers don't fully process what they're signing.

Importantly, even when dual agency is properly disclosed and consented to, the legal problems don't disappear. As the legal analysis from Mashian Law Group in California explains, when one agent handles both sides: "In handling the negotiations between the adverse principals, a dual agent who satisfies the fiduciary duties to one party will likely breach fiduciary duties to the other party." You cannot fight for the highest price and the lowest price at the same time. Something gives — and in most cases, what gives is the buyer's position.

Compare this to the eight states that have effectively banned dual agency entirely: Alaska, Colorado, Florida, Kansas, Maryland, Oklahoma, Texas, and Vermont. Legislators in those states reviewed the evidence and decided the practice was simply too prone to abuse to be permitted. California has not gone that far, but that doesn't mean California buyers should accept the risks.

What You Should Do Instead

The lesson from everything above is simple: when you walk into an open house, keep your enthusiasm and keep your wallet — but don't hand either of them to the listing agent.

Get your own buyer's agent before you start shopping. Your buyer's agent has a fiduciary duty to you. They negotiate for your interests, not the seller's. In most California transactions, the seller pays the buyer's agent commission, so this representation costs you nothing out of pocket in the traditional structure.

Get your financing pre-approved independently before you make any offer. Come to that open house knowing your numbers. Know what rate you qualify for. Know what you can afford at a realistic market rate — not a rate inflated by a lender referral. Call me at LoansByEmmett.com before you fall in love with a property. That conversation is free. The information it gives you is invaluable.

Be skeptical of bidding war urgency. A listing agent telling you "there are multiple offers" is not independent confirmation that multiple offers exist. Ask your own agent to investigate. Ask for data. Make decisions based on the market, not on pressure engineered by someone whose pay increases with your purchase price.

Read every document before signing. A buyer representation agreement that obligates you to pay commissions above what the seller has agreed to contribute is a real and enforceable contract. The case I described above is not hypothetical — my client nearly paid a 1% premium he was never told about clearly upfront. Read the numbers. Call someone you trust if you're unsure.

Understand that "easier" is not the same as "better." Yes, working with the listing agent feels simpler. There's one point of contact, one set of conversations. But simplicity for you in the moment often means the agent is working hard behind the scenes — to close the deal fast, at the best terms for their seller client, through their preferred lender. The real estate transaction is one of the largest financial decisions most people make in their lives. It is not a situation where "easier" should be the primary criterion.

A Note on the Changing Landscape

Following the landmark National Association of Realtors settlement that took effect in 2024, buyers are now frequently asked to sign buyer representation agreements before touring homes. This was intended to bring more transparency to agent compensation. In practice, it has also created new opportunities for the scenario I described in Case #2 — where unrepresented buyers, unfamiliar with the new paperwork landscape, find themselves signing buyer agreements with listing agents that include above-market fee obligations.

Research published after the NAR settlement changes suggests that dual agency arrangements may actually increase in frequency as more buyers hesitate to commit to a separate buyer's agent, preferring to tour homes on their own and work directly with listing agents if they find something they like. University of Alabama faculty fellow Bennie Waller, who has studied dual agency extensively, was quoted as saying the practice could "skyrocket" as a result of the new commission structure rules.

This means the risks I've described are not going away. If anything, more buyers will encounter these scenarios in the coming years, not fewer.

The Bottom Line

I've worked with borrowers across the full spectrum of the California real estate market. The buyers who come out best aren't necessarily the ones with the most money or the most real estate experience. They're the ones who show up prepared — with their own agent, with independent financing in place, and with a clear understanding of whose interests are whose.

The listing agent at that open house is doing their job. Your job is to make sure someone is doing yours.

If you're thinking about buying a home in California and want to understand your financing options before you fall in love with a property — before the pressure starts, before anyone asks you to sign anything — reach out to me at LoansByEmmett.com. I publish my rates openly because I believe you should be able to compare before you commit. That's the transparency you deserve in one of the biggest financial decisions of your life.

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Emmett is a licensed mortgage professional and the founder of LoansByEmmett.com, serving homebuyers across California. The scenarios described in this article are based on real client experiences, with identifying details omitted to protect privacy.