Is August 2026 a Good Time to Buy a Home in Sioux Falls, or Should You Wait Until September?

August 2026 is not the best time to buy a home in Sioux Falls, even though inventory is rising and more listings are sitting unsold. The data points to a specific window in September and October when sellers become more flexible, negotiating room opens up, and the buyers who prepared quietly during the summer stall come out ahead. If you rush into August without understanding what is driving the current failure rate, you are likely negotiating with the wrong sellers at the worst possible moment.

What Does the July 2026 Sioux Falls Market Data Actually Tell You?

The headline looks promising for buyers right now. Months of inventory jumped from 3.3 in June 2026 to 4.9 in July 2026, putting Sioux Falls squarely in balanced market territory. Days on market citywide are sitting at a median of 57 days. But the number that changes how you should read all of this is the failure rate.

In July 2026, 36.9% of all Sioux Falls listings came off the market without selling. Not under contract. Not pending. Just gone. One year ago in June 2025, that same failure rate for single-family homes was 5.6%. That is nearly seven times higher in twelve months.

A rising failure rate does not automatically mean motivated sellers are lined up waiting for your offer. What it actually means is that a large share of sellers priced their homes for a fast-moving market that no longer exists. Buyers walked away from those conversations. The sellers still sitting on the market in August are, in many cases, the same type. They have not yet recalibrated to current conditions. Active listing data from July 28th, 2026 shows properties sitting at 170 days, 194 days, and one at 244 days on market. Those are not sellers ready to negotiate a fair deal. That is a seller who may have run out of options but still has not adjusted their expectations.

Here's what's behind Is the Sale-to-List Ratio So Important Right Now?

The sale-to-list ratio tells you how close homes actually sold compared to what sellers were asking. In July 2026, that number citywide is 99.4%. Even with a failure rate near 37%, the homes that are selling are closing within half a percent of asking price. That means sellers with correctly priced listings still have real pricing power right now.

But look at what happened last fall. The single-family sale-to-list ratio in Sioux Falls moved like this: 98.9% in August 2025, then 97.8% in September 2025. On a $370,000 home, the median single-family sale price in September 2025, that 97.8% ratio means the buyer negotiated real money below asking. Compare that to the $384,900 median in August 2025 at 98.9% of asking and the difference between those two months becomes concrete. You are not just talking about a fraction of a percent. You are talking about meaningful negotiating room that simply was not available one month earlier.

The seasonal pattern is consistent. August is when the market stalls and inventory builds. September is historically when the sale-to-list ratio softens the most.

What Happens to Sioux Falls Home Prices Between August and September?

Prices are not falling in Sioux Falls. The single-family median sale price in July 2026 is $384,750, up from $362,000 in June 2025. Year over year, prices are higher. What the data shows is not a collapsing market but a selective one. The homes priced correctly are still selling close to asking. The overpriced ones are failing.

What does shift between August and September is the price point at which deals get done. In August 2025, the single-family median was $384,900. In September 2025, it came to $370,000. One month. The failure rate for single-family homes also dropped from 10.2% in August 2025 to 8.9% in September 2025. More sellers successfully closed in September, but at more realistic prices. The overpriced listings that could not find a buyer in August either reduced or expired. The ones that remained were priced to move.

That is the environment where a prepared buyer wins.

What Does a Real Example of This Look Like in Sioux Falls Right Now?

The July 28th, 2026 active listings data includes a four-bedroom home at 2904 S Western Ave that was reduced from $258,900 to $230,000 after 120 days on market. That is a $28,900 price reduction on a single listing. The seller has been tested by the market. They know what it feels like to sit without offers.

A buyer who arrives in September or October with financing already confirmed, no conditions hanging over the deal, and a clear sense of their actual budget is exactly what that seller has been waiting for. That is the position the STALL WINDOW creates for buyers who understand what they are walking into.

If You Are Selling and Buying at the Same Time in Sioux Falls, Does Waiting Still Make Sense?

This is the question we hear most from families who have outgrown their current home and are weighing the move. The fear is ending up with two mortgages, or selling at a loss while overpaying on the buy side.

Here is what the data actually shows for simultaneous movers. If you list in August, you are entering the stretch of the year with the highest failure rate and the longest days on market. Average days on market for single-family homes in August 2025 was 80 days. That is nearly three months of uncertainty on the sell side while you are trying to get ready to move on the buy side.

List in September instead and you are working with a thinner but more serious pool of buyers. The September 2025 single-family failure rate was 8.9%, lower than August's 10.2%. Sellers who priced correctly still closed. And on the buy side, you are entering a market where the sale-to-list ratio has softened to 97.8% and the median price has pulled back from August's peak. You may sell for slightly less in September. But you buy for slightly less too. The spread can work in your favour if you understand what is happening on both sides.

What Are the Four Signals to Watch Before You Make Your Move?

Patience without a plan is just waiting. Here are the four specific signals in the Sioux Falls market that tell you when the window is actually open.

• Months of inventory: Currently at 4.9 months in July 2026. If this climbs toward 5.5 or higher through August, inventory is building faster than buyers are absorbing it and sellers are about to get more flexible.

• Failure rate: At 36.9% in July 2026. Watch whether this stays elevated or climbs through August. A stubbornly high failure rate means overpriced sellers are still holding. When it starts to drop, the correctly priced and motivated sellers are winning and the deadweight is clearing out.

• Sale-to-list ratio: At 99.4% in July 2026. When this dips below 99% going into August and September, negotiating room is opening. Last year it fell to 97.8% by September. That is your signal.

• Price per square foot: The single-family price per square foot in July 2026 is $192.81, up from $189.43 in June 2025. Prices are not crashing. The market is being selective, not collapsing. Watch for this number to flatten or soften as fall arrives.

The Bottom Line for Sioux Falls Buyers in 2026

The data points to September and October as the window where motivated sellers, softened prices, and realistic negotiations come together. The buyers who understand the STALL WINDOW, prepare their financing in advance, and arrive with clarity about their actual budget are the ones who negotiate from a position of strength. The buyers who chase August inventory because rising listings look like opportunity end up grinding through conversations with sellers who are not yet ready to move.

For families in Sioux Falls who are ready to make a move, the question is not whether to buy. It is whether to buy now or buy smart.

Watch the full breakdown for the complete data walkthrough: https://youtu.be/rmAkEjVso1E

Julie Roth
Julie Roth Real Estate Team