Is one agent on both sides ever the cheaper option for a first purchase?

The part that decides it for me is inspection. Before contract, price is one number and you can argue about it in public. After inspection, you're asking for $9k on a roof and a sewer line, and that's when you want somebody who will call the other side and push. A dual agent turns into a messenger at exactly that moment. On my last two rehabs the post-inspection negotiation moved more money than the original offer did.

kestrel, one thing from the build side. On a house that needs nothing, the dual agent question matters less because there's less to negotiate about. On anything with deferred maintenance you're going to be arguing scope, and the person writing your offer needs to be willing to say the seller is wrong. Ask the agent directly what she does when you want her to argue about a $12k foundation credit. Her answer tells you more than the disclosure form does.

The comparison you're setting up depends on one assumption: that the commission saved by a single agent actually reaches you rather than staying with the brokerage or the seller.

Run it as a number. Say a $340,000 house with a total commission of 5 percent, so $17,000. If the seller's listing agreement drops the total to 4 percent when the same agent brings the buyer, that's $3,400 of room. That room belongs to the seller unless the price moves, and the seller has no obligation to hand it over. So the real question is whether you can get more than $3,400 off the price with no one advocating for you, versus what a separate buyer's agent might have gotten with the fee structure unchanged. Since the NAR settlement, buyer-side compensation has to be set in writing between you and your agent before you tour, which makes the comparison easier to see than it used to be, and you should ask for that page rather than taking it verbally.

What a dual agent stops doing varies by state, and in some states dual agency is prohibited outright, so the honest first step is confirming with your state real estate commission what form of consent is even legal where you're buying. Where it's permitted, the consent form typically bars the agent from advising either party on price or disclosing the other's motivation. That restriction is the whole cost. On a clean transaction with a firm price, the cost is low. On a repair-heavy property with a motivated seller, you're paying it exactly when advocacy is worth most.

I'm still building my list so I've had this conversation four or five times without buying anything. What I've noticed is that listing agents raise it early and casually, usually on the first call, before I've said anything about representation. That's not sinister, it's just how the incentive works. Now I say up front that I have my own agent, and the tone of the conversation changes. Worth knowing that the offer to write your offer sometimes comes before you've had a chance to think about whether you want it.

Coming from zero, the thing I'd have gotten wrong is assuming the form was a formality. I read one and it says the agent will not disclose the highest price the buyer will pay or the lowest the seller will take. Once I read that sentence out loud it stopped feeling neutral.