Stock Markets May 18, 2026 03:19 PM

Google trials for-sale listing carousel in mobile search, putting pressure on Zillow and CoStar

Mobile search results in several U.S. cities are showing a new listing ad format sourced from HouseCanary’s ComeHome platform, with paid lead options for buyer-side agents

By Ajmal Hussain GOOGL CSGP ZG

Google is running tests that place for-sale home listings inside mobile search results in multiple U.S. markets. The listings, supplied by HouseCanary’s ComeHome platform, appear in a carousel above paid links and include three pay-to-play user actions that send leads to buyer-side agents. The trials mirror December’s short-lived experiment and have prompted questions about how third-party real estate portals may be affected.

Google trials for-sale listing carousel in mobile search, putting pressure on Zillow and CoStar
GOOGL CSGP ZG

Key Points

  • Google is testing a for-sale listing carousel at the top of mobile search results in Austin, Cleveland, Miami and San Francisco.
  • Listings are provided by HouseCanary’s ComeHome platform, a registered broker, and include three paid action buttons linking users to buyer-side agents.
  • BTIG says Google’s placement and reach could challenge third-party listing sites such as Zillow and CoStar’s Homes.com.

Google is experimenting with a new way to surface for-sale homes in mobile search results across several U.S. markets, according to BTIG. The trial has been observed in Austin, Cleveland, Miami and San Francisco.

The current implementation displays a horizontal carousel of listings at the top of mobile search pages, positioned above the traditional paid search links. BTIG reported the listings come from HouseCanary’s ComeHome platform, which operates as a registered broker.

The listing cards include three explicit monetization actions: a book-a-tour button, a find-an-agent button and an ask-a-question button. Each of these actions routes users to buyer-side agents who pay to receive those placements, according to BTIG.

BTIG noted these tests echo a set of trials Google ran in December. Those earlier experiments were pulled after a matter of weeks following industry objections, the firm said. The objections at the time centered on rules that prevent brokers from advertising listings owned by other brokers, a regulatory and industry concern called out during the December rollout.

The current tests rely on the same listing data source and ad formats used in the December trial, BTIG said. That repetition highlights that Google is continuing to explore ways to integrate listings and monetization directly into its mobile search experience.

BTIG also flagged the competitive implications of Google’s distribution strength and its ability to place ad products prominently within search results. The firm said the tests raise questions about where established listing sites such as Zillow and CoStar’s Homes.com could fit if Google can access listing data and present monetized actions directly to consumers.

As presented by BTIG, the tests combine three elements that matter to platform economics: high-visibility placement in search results, a broker-registered source for listings and direct monetization mechanics that connect consumer actions to paying buyer-side agents.


Key points

  • Google is showing a for-sale listing carousel in mobile search in Austin, Cleveland, Miami and San Francisco.
  • Listings are sourced from HouseCanary’s ComeHome platform, which is a registered broker, and include three pay-to-play action buttons directing leads to buyer-side agents.
  • BTIG warns the tests could challenge third-party listing sites such as Zillow and CoStar’s Homes.com because of Google’s prominent placement and reach.

Summary of sectors impacted

  • Real estate listings and property marketplaces
  • Online advertising and search monetization
  • Brokerage and buyer-agent lead generation services

Risks and uncertainties

  • Regulatory or industry objections: December’s similar tests were halted after industry pushback related to rules preventing brokers from advertising other brokers’ listings; the same listing data and ad formats are in use now.
  • Competitive displacement: The format and prominent placement raise questions about the role of established listing platforms like Zillow and CoStar’s Homes.com if Google directly displays and monetizes listings.
  • Test continuity: An earlier December trial was discontinued within weeks, so it remains uncertain whether the current tests will persist or be altered following stakeholder reactions.

No additional details about broader rollout plans, contractual terms with agents, or regulatory responses were provided in the report cited by BTIG.

Risks

  • Industry and regulatory pushback over rules that bar brokers from advertising other brokers’ listings, as occurred during December’s tests - impacts real estate platforms and brokerages.
  • Potential displacement of established listing portals like Zillow and CoStar’s Homes.com if Google displays and monetizes listings directly - impacts real estate marketplaces and online advertising revenues.
  • Uncertainty about whether the tests will continue, expand or be withdrawn, given that a similar December trial was discontinued within weeks - impacts investors and market participants tracking platform strategies.

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