Dual Agency in Washington State: What You Must Know

Dual agency — where one agent represents both the buyer and the seller in the same transaction — is legal in Washington State, but it creates an inherent conflict of interest that no disclosure form can fully resolve. You’re allowed to consent to it. That doesn’t mean you should.

What dual agency actually means

In a standard transaction, the seller has a listing agent and the buyer has a buyer’s agent. Each agent owes their client undivided fiduciary loyalty: negotiate the best price, disclose relevant facts, advocate hard.

Dual agency collapses that structure. One licensee — or in some cases one brokerage — simultaneously represents both the buyer who wants to pay less and the seller who wants more. The agent cannot negotiate price on behalf of both parties at the same time. By definition, any move they make to help one side hurts the other.

Washington law addresses this directly. Under RCW 18.86.060, a licensee acting as a dual agent must secure written consent from both parties before proceeding. The statute is clear that the agent must disclose the dual-agency relationship and obtain acknowledgment. What the statute cannot do is give an agent two sets of interests to serve simultaneously. The legal requirement is disclosure and consent — not resolution of the underlying conflict.

Designated agency: WA’s common workaround

Many large Seattle brokerages handle dual agency through a structure called designated agency. Instead of a single agent representing both sides, the brokerage assigns two different agents — one for the buyer, one for the seller — each within the same firm.

This is better than pure dual agency. Your agent doesn’t know the other party’s negotiating strategy. But it introduces its own problem: both agents work for the same managing broker, and that broker has a financial interest in closing the deal regardless of price. The brokerage earns commission from both sides. If your deal falls apart, the brokerage loses both fees.

RCW 18.86.060 also governs designated agency, requiring written disclosure and consent. Read that form carefully if you see it. The fine print matters.

The mechanics of the conflict

Consider a realistic Seattle scenario. You list your Kirkland home with a brokerage. Three weeks later, your listing agent says they have a buyer — one of their own clients. You’re relieved. No more showings, no more open houses, a quick close.

Here’s what’s actually happening: your agent’s brokerage stands to collect commission from both sides of the transaction. Their buyer client has likely shared information — maximum budget, timeline pressure, emotional attachment to the neighborhood — that a truly independent buyer’s agent would never reveal to the listing side. The agent is not going to share that with you, but they’re also not going to use it against their buyer client. They’re stuck in the middle, serving neither party fully.

The urgency you feel about “their buyer” is not accidental. An agent with an in-house buyer can move faster, communicate more easily, and earn double — so there’s a structural reason they’ll surface that buyer prominently, even if a buyer from a different brokerage might pay more.

Red flags to watch for

“I have a buyer for your home.” Agents say this to drum up listings. Sometimes it’s true. But it means dual agency or designated agency is coming, and you should slow down and evaluate independently whether this is in your interest.

In-house buyer programs at large Seattle brokerages. Several major firms operating in King and Snohomish counties run buyer databases they cross-reference with new listings. This creates pipeline pressure: the brokerage benefits from matching its own buyers to its own listings. That’s two commissions instead of one.

Speed as a selling point. “We can close fast because we control both sides.” Faster is not always better for the seller. It may simply be more profitable for the brokerage.

Reluctance to explain the disclosure form. If your agent hands you a dual-agency or designated-agency consent form and moves quickly past it, that’s a problem. Ask them to walk you through it in plain language.

What Washington law requires — and what it doesn’t fix

Here’s a summary of the disclosure framework under RCW 18.86:

Requirement	What the law says
Disclosure	Agent must disclose dual agency before it begins
Consent	Written consent required from both buyer and seller
Duties retained	Honesty, disclosure of known material defects
Duties limited	Price negotiation, confidentiality of motivation
Remedy for violation	Civil liability; license discipline through DOL

The law creates accountability after the fact. It does not prevent the conflict in the first place. An agent who violates dual-agency rules can face disciplinary action from the Washington Department of Licensing — but that happens after your deal closes on terms that may not have served you well.

How to protect yourself

Ask before you list. Ask your agent directly: “Do you currently represent any buyers looking in this area and price range?” If the answer is yes, you need to understand how that relationship would be managed if they bring you an offer.

Get a separate agent if you’re a buyer. If you’re buying a home and fall in love with a property listed by your own agent’s brokerage, you have the right to use an independent buyer’s agent. The listing brokerage may even cooperate — the commission split is standard either way.

Read the disclosure forms. Washington requires specific disclosure language under RCW 18.86. If you’re presented with a dual-agency or designated-agency consent form, take it home and read it. You are not obligated to sign it on the spot.

Understand that the conflict is structural, not personal. Most agents who end up in dual-agency situations are not acting in bad faith. The conflict is baked into the economics. An agent cannot be paid by both sides and owe equal loyalty to both sides. That’s not a character flaw — it’s a math problem.

The flat-fee angle

One reason dual-agency pressure is largely absent with flat-fee listing arrangements is that flat-fee listing agents — including ours — don’t carry buyer clients. We’re hired to list your home and execute the sale. We don’t maintain a buyer database we’re trying to match. When a buyer comes, they bring their own agent, and that agent owes loyalty exclusively to the buyer.

That doesn’t guarantee you’ll never face a situation where a buyer’s agent and listing agent work at the same brokerage — the real estate industry is big and Seattle is a small market. But it removes one specific source of in-house pressure: the listing agent who “has a buyer for your home” and stands to earn double by putting them together.

If you’re evaluating your options before listing in King or Snohomish County, ask every agent you interview how they handle dual agency. Their answer will tell you something important about how they think about whose interests they’re serving.