The Seller Is Not Being Stubborn. Moving Costs Him $636 a Month.

By Steve Waller · September 11, 2026

Start with the number that explains everything

Freddie Mac put the 30-year fixed at 6.76% on 10 September, up from 6.71% the week before and from 6.35% a year ago. That is the rate a seller becomes a buyer at. The 10-year Treasury, which is what longer-term investment property pricing tracks, sat at 4.83% on 9 September, up from 4.78% a week earlier.

Now the rate they already have. Per the FHFA National Mortgage Database, as of the first quarter of 2026, 77.9% of outstanding American mortgages carry a rate below 6%. 66.7% are below 5%. 49.9% are below 4%. One in five is below 3%.

Put the two together on Houston's own median house, $330,000 in August.

An owner who financed $240,000 in 2021 at 3.5% pays $1,078 a month in principal and interest. Sell, and buy the same house again at $330,000 with twenty percent down, and the new note is $264,000 at 6.76% — $1,714 a month.

Same house. Same neighborhood. $636 more every month, a 59% increase, for nothing.

Then add what it costs to be competitive

A house that has not been touched since 2005 does not sell in 54 days against 38,947 other listings. It sells after a price cut, or it sells after work.

The work does not pay for itself. On the most recent Cost vs. Value national averages, an asphalt roof replacement runs $31,871 and returns 68% of that at resale. An HVAC electrification conversion is $19,484 at 72%. A midrange bath remodel is $26,138 at 80%. Only the small exterior items pay back more than they cost: a garage door replacement at $4,672 returns 268%, and fiber-cement siding at $21,485 returns 114%. None of those three make an outdated house competitive on their own.

A seller who does roof, HVAC and one bathroom spends about $77,500 and recovers about $56,600 of it in price. Nearly twenty-one thousand dollars of equity gone, to reach a sale price the market was going to discount anyway.

The whole trade, in one column

• Sale price at the Houston median: $330,000
• Work required to compete: minus $77,500
• Commission and closing at roughly 7.5%: minus $24,750
• Net before paying off the existing loan: about $227,750
• And the monthly payment on the next house: up $636

That is not a stubborn seller. That is a rational one.

What this actually means for inventory

Here is the part most commentary gets wrong. Houston's active listing count in August was 38,947, up only 0.5% year over year. Months of inventory sat at 5.3, unchanged. Supply is not surging.

Sales are what moved. Closings fell 11.5% year over year, and the median price slipped 1.5% to $330,000 while days on market went from 52 to 54.

So the market is not filling up with new sellers. It is holding the same pile of houses for longer, because the owners of those houses can afford to wait and cannot afford to capitulate. A house sitting 120 days is not a motivated seller. It is a seller who has run the same numbers above and concluded that sitting is cheaper than moving.

The consequence for an investor

Waiting for price expectations to break is not a strategy in this market. The seller's floor is set by his own mortgage, not by his listing agent's patience, and no amount of days on market moves a floor that is built out of a 3.5% note.

The properties that do trade at investor prices are the ones where nobody is protecting a payment:

• Estates and probate. The note is gone or is being paid by someone who did not choose it.
• Out-of-state owners. No emotional floor, no plan to buy again locally, and a management problem they want to end.
• Tired rentals and portfolio exits. The owner is comparing the sale to a return, not to a housing payment.
• Bank-owned and pre-foreclosure. The institution has a disposition timeline. That is the cleanest version of this, because the house is usually empty and there is no occupant to remove.
• Owners already carrying a rate above 6%. That is now 22.1% of mortgages as of the first quarter of 2026 — a share that has now overtaken the number of loans still below 3%. These people have no lock-in to lose.

That last group is the one worth watching. The lock-in is real but it is thinning at the edges, and every month adds sellers who bought at today's rates and therefore have nothing to give up by moving.

How we screen against this

We ran the whole Houston tenant-occupied listing market this week on exactly this logic — 325 houses for sale with a paying tenant already in them, every one valued against closed sales inside its own subdivision. Not one cleared 75% of after-repair value at the asking price. Which is what this piece predicts: those houses belong to people with a note they like and income they are collecting, and they are priced accordingly.

Run the trade before you chase the listing. The purchase, carry and both exits are modelled on our deal calculator, and it will tell you what a property supports before you are committed to it.

Sources

• Freddie Mac Primary Mortgage Market Survey, 10 September 2026
• FHFA National Mortgage Database — outstanding mortgage rate distribution, Q1 2026
• Houston Association of Realtors — August 2026 MLS monthly housing report
• FRED, Federal Reserve Bank of St. Louis — 10-Year Treasury Constant Maturity Rate (DGS10)
• Cost vs. Value Report national averages, Journal of Light Construction

Market data is from public sources and is provided for information only. Nothing here is an offer of credit, a rate quote, or investment advice. Financing is subject to underwriting, lender approval, appraisal or valuation, title, insurance, property eligibility and program availability.

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