Largest U.S. Brokerage Compass Sues Zillow in New York Federal Court Over 24-Hour Private Listing Ban, Seeks Injunction

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Updated Jul 1, 2025, 03:29 PM

Compass Inc., the largest U.S. residential real estate brokerage by sales volume, filed an antitrust lawsuit against Zillow Group Inc., the nation's largest online real estate portal, in the U.S. District Court for the Southern District of New York. The lawsuit alleges that Zillow's policy banning private home listings that do not appear on Zillow within 24 hours constitutes anticompetitive behavior and violates federal antitrust laws.

Compass claims Zillow is using this policy, referred to as the "Zillow ban," to protect its monopoly and stifle competition by restricting privately marketed listings shared outside Zillow's platform. Zillow requires that any publicly marketed listings must be submitted to multiple listing services within one business day or face removal from its site. Compass has requested a temporary injunction to block the enforcement of this policy, arguing that nearly half of its listings earlier this year started as privately marketed listings and that Zillow's rules are causing harm and confusion. Zillow has responded by stating that Compass has not demonstrated irreparable harm from the ban, which took effect as scheduled. The dispute highlights the growing power struggle in the U.S. online real estate market, with Zillow operating both as a portal and a brokerage in all 50 states. This lawsuit follows Compass's earlier challenges to other listing policies and comes amid broader industry consolidation, including Rocket Companies' recent acquisition of Redfin, another major real estate brokerage and portal.

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Sources

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