Zillow loses thousands of listings in fight over “hidden” homes
Source: Ars Technica
Zillow asks for a preliminary injunction as the real‑estate industry fight heats up.
On Wednesday, Zillow abruptly lost access to thousands of property listings in the Chicago area after filing a lawsuit accusing a private‑listing‑network owner of colluding with the nation’s largest brokerage to harm consumers by hiding homes.
According to the Chicago Sun‑Times, hopeful Chicagoland home buyers browsing Zillow and Trulia suddenly saw significantly fewer listings. On Zillow, a market that normally shows nearly 5,000 homes dropped to about 1,700.
Diligent buyers can still turn to other platforms—such as Redfin and Realtor.com—which currently host between 5,000 and 8,000 listings, the Sun‑Times noted.
In an antitrust lawsuit filed last week, Zillow claimed that everyone buying or selling a home will be harmed if the alleged collusion goes unchecked.
Allegations
- Midwest Real Estate Data LLC (MRED) – Chicago’s multiple‑listing‑service (MLS) provider.
- Compass – Chicago’s dominant brokerage.
Zillow alleges that MRED and Compass have conspired to create “barriers to information that harm or threaten harm to sellers, buyers, and competitors by hiding real‑estate listings behind a velvet rope in a Private Listing Network (PLN).”
“Rather than share all of its listings transparently—as its competitors do—Compass has sought to anticompetitively benefit from its dominance by hiding listings from anyone who is not working with a Compass agent in a PLN,” Zillow’s complaint alleges.
According to the complaint, this arrangement:
- Allows Compass to lure prospective buyers with the promise of access to listings hidden behind a registration wall.
- Enables the brokerage to engineer “dual‑agency” deals where its agents represent both sides of the transaction, maximizing profit.
Zillow’s Statement
“Chicagoland home buyers and sellers today have far worse access to the housing market than they had yesterday, because their local MLS decided one mega‑brokerage’s profits mattered more than their ability to achieve the American Dream.”
— Zillow, in a statement to Ars
Zillow has requested a preliminary injunction to end the suppression of listings and other alleged unlawful attempts to manipulate the home‑buying market to the disadvantage of platforms that promote greater transparency.
Firms Defend Private Listings
Background
- The Multiple Listing Service (MRED) has moved to force the legal dispute with Zillow into arbitration, arguing that Zillow’s antitrust claims are “meritless” and essentially a contract issue.
- MRED contends that Zillow’s alleged harms are “self‑inflicted” because the platform knowingly blocked nine listings of previously hidden homes, which triggered a violation that cut off access to 43,000 listings.
MRED’s Position
- In a press release, MRED stated that Zillow lost access to its listings after breaching its contract.
- The release added:
“In a striking lesson in irony, Zillow has chosen not to display 43,000 MRED listings because it demands the right, and has filed a federal antitrust lawsuit to secure that right—to exclude nine listings it disfavors.”
Compass’s Response
- When asked for comment, Compass told Ars that the legal fight “is about whether homeowners have a choice in how they market their homes, or whether Zillow can set a one‑size‑fits‑all policy for the industry.”
- Compass emphasized:
“Restricting listing visibility and penalizing agents for exercising lawful and strategic marketing options undermines consumer choice.”
- The firm also praised MRED for “enforcing policies that protect both consumer choice and the fiduciary obligations agents owe their clients.”
- Compass added that “buyers in Chicago should not be deprived of access to listings because a platform disagrees with how a homeowner chooses to market their property.”
Zillow Preview Launch Complicates Real‑Estate Fight
April 2025 – May 2025
Background
In April 2025 Zillow announced new Listing Access Standards that it said were meant to protect consumers by blocking “listings that had been previously marketed privately to only a select group of buyers and were withheld from all market participants.”
The company hoped the policy would push the market toward greater transparency and reduce the use of private‑listing networks (PLNs).
The Dispute
| Party | Claim | Key Events |
|---|---|---|
| Zillow | Compass and the Midwest Real Estate Data (MRED) consortium threatened to cut Zillow’s access to all Chicago‑area listings unless Zillow displayed certain private listings that violated its standards. | • May 2025 – Zillow suppressed nine listings for non‑compliance. • MRED issued a warning that it would terminate Zillow’s feed if the listings were not shown. |
| Compass / MRED | Filed a motion to compel arbitration, arguing Zillow sued out of “dissatisfaction” with its contract terms and “insecurity about continuing to generate revenue.” | • Stated any harm Zillow suffered was “self‑inflicted, readily avoidable, and can be remedied by complying with longstanding license agreements.” |
| Zillow | Accuses the two firms of a conspiracy to force Zillow to abandon its consumer‑friendly policies and to keep private listings hidden from the market. | • Claims MRED and Compass control > 99 % of Chicagoland listing platforms and act “in lockstep” to leverage that monopoly power. |
Zillow’s Defense of “Zillow Preview”
- “Zillow Preview is not the same as a private‑listing network.”
- It is “available for any buyer to see and aligned with our transparency standards.”
“Private listings networks are just that—private, and only available to buyers working with a specific brokerage or agent. The goal of Preview is to help sell the house. The goal of PLNs is to hide the house to force more buyers into working with your brokerage.”
Market Context
- Housing inventory remains well below pre‑pandemic levels, contributing to “persistently high mortgage rates and home prices” (2026 Experian forecast).
- While inventory is expected to modestly increase in 2026, the legal battle suggests some brokerages may still try to hide new listings to protect profit margins.
Zillow’s Allegations Summarized
“Defendants’ conspiracy harms home buyers and sellers by incentivizing brokerages to withhold listings from the market only until the listing fails to sell privately, thus erecting barriers to information, exacerbating the accessibility and affordability crisis, and reducing the pool of buyers and listings that makes the real‑estate market efficient and competitive.”
“MRED and Compass have colluded to turn back the clock on consumer transparency at the exact moment American families can least afford it, cutting off competition, hiding homes and engineering a market that extracts more from buyers and sellers so Compass can pocket more on every deal.”
Author
Ashley Belanger – senior policy reporter for Ars Technica, covering the social impacts of emerging policies and technologies. Based in Chicago, with 20 years of journalism experience.
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