One house, two prices
In September 2021, Zillow bought a Tolleson, Arizona, rental for about $412,000, Bloomberg reported.C48 Two weeks and light repairs later, Zillow listed that house at $387,000.C48 The listing was a request, not a completed resale.C48
The purchase and the listing
Paid to the owner
About $412,000C48
Bloomberg reported a purchase of about $412,000 in September 2021 for a rental property in Tolleson, Arizona.C48
Asked of the next buyer
$387,000 asking priceC48
After light repairs, Zillow listed that house two weeks later at $387,000, according to Bloomberg.C48
The second price was a listing, not a recorded sale or a realized loss.C48
There is a difference between putting a value on someone else's house and paying to own it. Where could a promising estimate become a bad purchase?
Zillow Offers promised convenience: owners could avoid preparing a listing, hosting viewings and arranging open houses.C122 Zillow would acquire the property, make repairs and offer it to another buyer.C02 In February 2021, the company announced that eligible properties in more than twenty cities could receive an initial cash offer based on the Zestimate, its automated valuation.C05 Jeremy Wacksman, then its chief operating officer, said the move demonstrated confidence in that estimate.C07
The first number was only the beginning. Zillow's description included pricing analysts, a local broker's valuation and a visit inside the house before a final offer; repairs could reduce the amount, and separate charges affected the seller's proceeds.C17C18C19C20C25C127 Its published terms left an owner free to decline before signing the contract.C22 People helped set the price.C17C18C19 Another person decided whether to take it.C22
The purchases outgrow the sales
Zillow accelerated its buying through the first three quarters of 2021.C12C31C52 By the third quarter, acquisitions substantially exceeded sales.C52
The pace of buying
First quarter purchases
1,856 homesC12
Zillow acquired 1,856 homes during the first quarter of 2021.C12
Second quarter purchases
3,805 homesC31
During the second quarter of 2021, it purchased 3,805 homes.C31
Third quarter purchases
9,680 homesC52
Purchases reached 9,680 homes during the third quarter of 2021; sales numbered 3,032.C52
Third quarter sales
3,032 homesC52
Zillow sold 3,032 houses during the third quarter of 2021.C52
Quarterly transaction counts; these are not counts of homes held on a particular date.C12C31C52
On October 18, the company stopped taking additional purchase contracts for the remainder of 2021, attributing the pause to a renovation backlog and limits on operating capacity.C37 Analyst Mike DelPrete checked a different part of the business: the prices.C41 On October 25, his Phoenix comparison put the median listing $29,000 below Zillow's acquisition price.C41 Again, he was comparing an asking price with a purchase, rather than reporting a finished sale.C41C42
Zillow's own explanation followed in its November 2 quarterly letter.C54 It said an unusually large share of requested offers had turned into signed purchases because it had unintentionally acquired homes above its revised forecasts of what those properties would sell for.C54 A rising acceptance rate had accompanied purchases it no longer expected to recover at resale.C54
The company also explained the time problem: its business required predictions of home prices three to six months into the future.C59 Understanding the purchase means looking at both decisions: the owner's choice now, and Zillow's estimate of a later sale.
Which offers become houses?
Start with an illustration Plain Stories made, rather than a reconstruction of those transactions.C106C130 Its simulated houses each have an assumed value of $350,000.C106 Every owner knows that value and accepts only a price above it; an offer below it gets refused.C117C130 This deliberately removes the other reasons someone might sell.
Under that rule, the low estimate leaves the simulated buyer with no house.C117 The high estimate puts a house in its holdings.C117 Now try the same choice across the illustration's thousand offers.C106
Which offers become purchases?
Illustrative model. Every home is assumed to be worth $350,000. Owners know that assumed value and accept only offers above it. This view has no service fee.
Offers per error interval · tallest bar: 85 offers
Estimate below / above assumed value
Rejected offersAccepted offers
Showing all 1,000 offers; 500 are accepted.
| Offers counted | Homes | Mean signed estimate error |
|---|---|---|
| All offers | 1,000 | 0.00% |
| Accepted offers | 500 | +8.16% |
Positive and negative errors cancel across all offers; individual estimates still have errors. Among accepted offers, the average price exceeds assumed value by $28,562. This model illustrates selection; it does not measure Zillow’s actual losses or sellers’ knowledge.
The filter changes which mistakes remain. The low offers can balance the high ones in a score covering every estimate; they cannot balance the prices of houses the buyer never acquired.C108C117C134 In this illustration, a balanced set of mistakes becomes an expensive set of purchases.C108C117C134
Economists Greg Buchak, Gregor Matvos, Tomasz Piskorski and Amit Seru describe the related problem as adverse selection: an owner who can readily sell elsewhere mainly chooses the instant buyer when that buyer values the home too highly.C91 The seller's choice changes the mix of properties the business receives.C91
But remember the convenience being sold. In the economists' calibrated model, most transactions with these buyers involve owners keen to move quickly.C129 Such an owner need not wait for an excessive offer. The researchers' five-market data from 2013–2018 also showed these businesses buying below comparable listed properties and earning a resale spread of roughly 5% of the purchase price before costs.C95 An illustration that permits only overpayments leaves out a valuable part of the service.
Method and limits
The illustration uses a bell-shaped distribution of errors, with their size calibrated to Zillow's published 6.9% median error for off-market Zestimates in June 2021.C28C130 A median divides the errors into equal halves by size; it is not the largest possible miss.C114 The 6.9% describes estimates of homes not listed for sale, rather than an independently measured error rate for the final offers Zillow made after its additional pricing steps.C17C18C19C28C130
With a simplified 2.5% deduction, the illustration accepts 401 offers and averages about $24,900 in overpayment per purchase.C107 Zillow advertised that percentage as its average service charge, separately from selling costs, closing costs and repairs; deducting that one fee does not reproduce the full transaction.C25C107C127
Nor does the illustration match Zillow's acceptance rate.C60C130 Zillow said it converted about one in ten serious sellers requesting an offer, while the version without fees accepts half its simulated owners.C60C130 Its output demonstrates the stated selection rule; it does not measure how much of Zillow's loss that rule explains.C106C117C130
The price months later
The illustration holds each home's assumed value still while an owner makes a choice.C106C117 Zillow's real business required a view of the future.C59
Rich Barton, its co-founder and chief executive, said the unpredictability of home-price forecasts had exceeded expectations.C57 He and finance chief Allen Parker wrote that their misses had gone both ways, by more than they had modeled as possible.C58 On the November 2, 2021 earnings call, Barton said the volatility made the company resemble a “leveraged housing trader”.C135 Borrowing to own houses increases exposure to changes in their prices.
The price needed months ahead
- TodayA home’s current estimated value
- 3–6 months laterThe future selling price Zillow said it needed to forecast
A forecast horizon, not a price trend. The future price is unknown; no price curve is shown.
This is the second place a promising estimate can become a bad purchase: the price it anticipates may belong to a future that does not arrive. Zillow's letter linked its higher acceptance rate to purchases above updated resale expectations; the same account also described a forecasting problem.C54C58C59
The company cited renovation capacity and other operational difficulties as well, aggravated by the pandemic and difficulties with labor and supply chains.C62 The selection illustration isolates one risk. It cannot tell you how much came from that risk, changing expectations or getting houses ready to sell.C54C59C62C130
Closing the business
On November 2, 2021, Zillow's board opted to close Zillow Offers.C61 The decision reached beyond the houses: CNN reported Zillow's planned reduction of roughly 2,000 jobs, while the company's filing put the cut at around a quarter of its workforce.C63C64
The cost of closing
Business result
$630 million after taxC79
Zillow Offers recorded a $630 million loss for 2021, net of income taxes.C79
Planned jobs cut
Roughly 2,000 jobsC64
Zillow announced a reduction of about 25% of its workforce; CNN reported roughly 2,000 jobs.C63C64
Completion
Zillow reports that it finished winding down the business in the third quarter of 2022.C78
The closure concerned Zillow Offers.C78 Zillow's continuing business reported results for the quarter ending June 2026.C104
The houses took time to sell. By the end of June 2022, purchases had ceased and seventy-one remained; Zillow reports the wind-down finished during the following quarter.C75C78 As recorded in its results for the quarter ending June 2026, Zillow itself continued operating.C104
There is no measured failure rate for automated home-buying in the evidence here. The subsequent results of competing companies give context, but cannot supply that denominator.
Accounting, rivals and the investor case
Zillow recorded about $304 million in inventory write-downs during the third quarter of 2021, largely against homes still unsold at quarter-end.C55C56 A write-down reduces the recorded value to reflect an expected shortfall. The total for the last two quarters was $405 million, whereas Zillow Offers' full-year loss after tax was $630 million.C70C79 Adding those amounts would mix a valuation adjustment with the business's overall result.
Opendoor reported a $1.353 billion loss for 2022 and Offerpad a $148.6 million loss; both were still acquiring and selling homes in mid-2026.C82C85C110C111 Their different businesses and periods do not establish the frequency of failure. Zillow reported revenue of $772 million and a $4 million net loss in the second quarter of 2026.C104
Investors alleged that Zillow's statements about its pricing systems were misleading; Zillow denies wrongdoing and says it will defend the lawsuit.C76C101 In the documented October 5, 2026 status, Jaeger v. Zillow Group remained a certified class action, with trial scheduled for September 13, 2027 and no finding of wrongdoing.C100C109 The Supreme Court declined on October 5 to review class certification, a procedural question rather than a decision that the allegations were true.C105C109
Put the cost beside the price
A cash offer on a home's page asks the owner to judge a price. For the buyer, the test continues after acceptance: it still has to own, prepare and sell the house.C02C08C22 DelPrete's comparison made that second side visible by putting Zillow's acquisition prices beside its listings.C41
If you quote building work or freelance projects, try a version of that comparison this week. Choose twenty completed jobs you won. Write down the agreed price and what you actually spent in consistent units, then set aside additions the original quote was never meant to cover.
Review the work you won
Accepted price
Record the agreed price for each completed job you chose to review.
Actual cost
Place the eventual expenditure beside it. Use consistent units.
What changed?
Separate later additions from the original scope; investigate hours, materials and omissions.
A suggested check of your own records. Retain declined quotes; an overrun alone does not prove why the customer accepted.
Use the difference to find a question worth investigating: underestimated hours, materials, a change in scope. Keep records of declined quotes too, while recognizing that you do not know their eventual costs. An expensive job does not by itself show that a customer spotted your pricing error.
For the Tolleson owner, Zillow's purchase completed the sale.C48 For Zillow, it began the wait for another buyer.C48 Leave a column beside the accepted price for the amount that comes after it.