Yes — you want your own agent, and you want them registered before your first model home visit. In Sioux Falls, Tea, and Harrisburg, the builder’s on-site salesperson works for the builder, not for you. Bringing your own agent costs you nothing in almost every case because the builder pays that commission, but if you tour and register alone first, most builders will refuse to add your agent later. That one visit can quietly cost you representation on a $400,000 purchase.

By Jeff Merrill | July 22, 2026

If you’ve driven the new construction corridors out past Tea, through Harrisburg, or across the northwest side of Sioux Falls lately, you’ve seen the “Model Open” flags. Inventory is up, builders are motivated, and the incentives are the best they’ve been in five years.

So you do the natural thing. You pull in, walk the model, and the friendly person at the desk hands you a card and a floor plan. They’re helpful. They’re knowledgeable. They answer every question.

Here’s what nobody tells you at that desk: that person represents the builder. Their job is to sell you that home at the highest price with the most upgrades — and to do it without you having anyone in your corner. The moment you sign in on your own, you may have already given up your right to bring in your own agent later.

Let me walk you through how this actually works in the Sioux Falls market, because the rules changed in 2025, and a lot of buyers are getting burned by information that’s a few years out of date.

The builder’s rep is not your agent

The person in the model home is called the on-site sales agent, and they are paid by the builder — Allen Homes, Van Buskirk, Cordes, Epcon, whoever it is. They are good at their job. That’s the problem.

Everything they tell you is true. It’s also curated. They’ll show you the base price, then the upgrade sheet, then the “if you sign this month” incentive. What they won’t do is tell you which upgrades hold their value in a Harrisburg resale, which lots have drainage issues you’ll pay for later, or how this builder’s actual delivery timelines compare to what they’re promising you.

That’s not dishonesty. That’s just the difference between someone who works for the seller and someone who works for you.

Your own agent does the things the builder’s rep never will:

  • Compare the builder’s price to recent closed sales of similar new and resale homes in the same submarket
  • Read the builder’s contract, which is written by the builder’s attorney to protect the builder
  • Push back on upgrade pricing and negotiate incentives you didn’t know were on the table
  • Flag construction and lot issues at framing and final walkthrough, before you sign off
  • Keep your earnest money protected and your financing contingency intact

In South Dakota you’re also dealing with a Seller’s Property Condition Disclosure Statement, the transfer fee, and a title company closing rather than an escrow company. New construction has its own wrinkles on all three, and the builder’s rep isn’t going to coach you through the parts that favor you.

The first-visit rule that costs buyers their representation

This is the single most important thing in this whole post, so read it twice.

Most builders require your agent to be present, or at least registered, on your very first visit. If you walk into the model alone and put your name on the sign-in sheet, many builders will treat that as you registering yourself — and they will not add your agent to the deal afterward.

The logic is simple from the builder’s side. If you found the home on your own, the builder doesn’t want to pay a buyer’s agent commission on a sale they’d have made anyway. So they set a rule: no agent at first contact, no agent commission, no agent.

You lose your advocate over a Saturday afternoon drive-by.

The fix costs you nothing. Before you tour a single model in Tea, Harrisburg, or northwest Sioux Falls:

  1. Line up your agent first, even if you’re just starting to look
  2. Have your agent register you with the builder, or bring them to the first showing
  3. If you’re driving by on a whim and want to peek inside, tell the on-site rep you’re working with an agent and give them your agent’s name before you sign anything

That’s it. Do that, and you keep representation. Skip it, and you may be on your own for a six-figure purchase with a contract written by the other side.

Who actually pays for your agent

The most common reason buyers skip their own agent is a myth: that it’ll cost them money. In new construction, it almost never does.

Builders pay buyer-agent commissions out of their marketing budget — typically in the 2 to 3 percent range. It’s baked into the sales structure. When you bring your own agent, you’re using a service the builder has already priced in. When you don’t, the builder simply keeps that money. You don’t get a discount for going alone.

Now, one honest qualifier, because 2026 is different from a few years ago. After the national commission rules changed in 2024 and 2025, buyers and agents now sign a written agreement about compensation before touring homes. Some builders used that shift to restructure what they pay buyer’s agents, so the amount can vary from builder to builder — and sometimes between two communities from the same builder.

What that means for you: it’s more important than ever to get the compensation spelled out up front. A good agent handles this in the buyer agency agreement before you ever set foot in a model, so there are no surprises and no out-of-pocket cost lands on you at closing. This is exactly the kind of thing I walk clients through before we tour anything.

What this looks like in the Sioux Falls market right now

The reason this matters so much in 2026 is that we’re in a buyer-favorable new construction market for the first time in years.

Builders across Sioux Falls, Tea, Harrisburg, and Brandon are sitting on more finished and to-be-built inventory than they’ve had in a long time. To move it, they’re offering rate buydowns, closing cost credits, and price reductions — some homes have come down 10 to 13 percent from the peak. Industry data shows the majority of move-in-ready new homes right now carry some kind of builder incentive.

That’s a lot of money on the table. And the person best positioned to know which of those incentives is real, which is a gimmick, and which can be pushed further is an agent who works for you — not the one whose paycheck depends on the builder’s bottom line.

A rate buydown that saves you $250 a month is often worth more than a $10,000 price cut. Knowing which lever to pull, and how hard, is the whole game. That’s not something you want to figure out alone at the sales desk.

Frequently Asked Questions

Is it cheaper to buy new construction without a realtor in Sioux Falls?
No. Builders pay the buyer’s agent commission from their marketing budget, and they don’t lower the price if you come without an agent — they just keep that money. Going alone gives you no discount and no advocate.

Can I bring my own agent after I’ve already visited the model home?
Usually not. Most Sioux Falls-area builders require your agent to be registered on your first visit. If you toured and signed in alone, most builders will refuse to add your agent to the transaction later. Register your agent before your first visit to protect your representation.

Does the builder’s sales agent represent me?
No. The on-site salesperson is paid by and works for the builder. Their job is to sell the home at the highest price with the most upgrades. They cannot negotiate against their own employer on your behalf.

Do I still need an inspection on a brand-new home?
Yes. New construction can and does have defects — drainage, framing, mechanical, and finish issues that surface at the walkthrough or in the first year. Your agent can help you schedule an independent inspection and use the builder’s warranty period correctly.

How does the 2026 buyer agency agreement affect new construction?
Buyers and agents now sign a written compensation agreement before touring. For new construction, this means getting the builder’s buyer-agent commission confirmed up front, so you know there’s no out-of-pocket cost to you before you tour a single model.

The bottom line

Buying new construction in Sioux Falls without your own agent doesn’t save you money — it just removes the one person whose only job is to protect your side of a six-figure deal written entirely by the builder. The catch is timing: line up and register your agent before your first model visit, or you may forfeit that protection entirely.

If you’re starting to tour models out in Tea, Harrisburg, or northwest Sioux Falls, get your representation in place first. I’m happy to walk you through the builders, the incentives, and the fine print before you ever sign in. Call or text me at 605-201-2846, or reach out at siouxfallsgreathomes.wordpress.com.

About Jeff Merrill
Jeff Merrill leads The Jeff Merrill Team, powered by eXp Realty, serving Sioux Falls and the surrounding South Dakota communities of Madison, Mitchell, Canistota, and beyond. He helps motivated buyers, sellers, and new agents cut through the hype in real estate with honest guidance, hands-on mentorship, and a track record of real results.