Zillow just made a significant shift in how listings can appear on its platform—and it could reshape how homes are marketed and discovered.
In March 2026, Zillow introduced Zillow Preview, a feature that allows select brokerages to showcase listings before they officially hit the market. While this may seem like a minor update to the average buyer, it has meaningful implications for agents, brokerages, and competition across the industry.
What Are Pre-Market, Private, and Pocket Listings? To understand the impact, it helps to clarify the terminology:
Pre-market listings: Homes not yet publicly available on the broader market
Private listings: Shared within a brokerage’s network but not on public platforms
Pocket listings: Fully off-market, controlled exclusively by the listing agent. All three exist outside the traditional Multiple Listing Service (MLS)—the central database that powers most home search platforms.
These strategies allow brokerages to: Test pricing and demand before going public, keep “days on market” low, and potentially represent both buyer and seller, capturing more commission.
What Zillow Preview Changes
Zillow Preview brings these previously restricted listings into a semi-public environment. Instead of being limited to a brokerage’s internal network, these homes are now visible to anyone browsing Zillow—before they officially launch. Zillow’s stated goal is to “bring these homes out of the shadows.” But in practice, it creates a new category: Pre-market listings with massive exposure—but not full market competition
Who Has Access? At launch, Zillow partnered with major brokerages, including Keller Williams, RE/MAX, HomeServices of America, Side, and United Real Estate. Together, these firms represent hundreds of thousands of agents, giving Zillow Preview immediate scale. Zillow says smaller brokerages can join, but early access clearly favors large networks.
Why This Is Controversial
The criticism centers on control and fairness.
- Uneven Playing Field
Sellers and agents using Zillow Preview can: Test pricing based on user engagement (saves, views) and adjust strategy before going fully public. Agents outside the program don’t have access to that same data or exposure.
- Platform Dependency
Zillow pays listing agents when buyers use a Zillow Preferred Agent, while also charging those agents referral fees—reportedly up to 40%. This raises concerns about: Referral monopolies; Increased reliance on Zillow’s ecosystem, and Margin compression for agents.
- Fragmented Search Experience
Because different platforms now have different pre-market partnerships: Zillow → Zillow Preview listings; Homes.com / Realtor.com → eXp partnerships; Redfin / Rocket → Compass “Coming Soon”. Buyers must now check multiple platforms to see the full picture.
A Rapid Industry Response
Zillow’s move triggered immediate reactions: Homes.com, Realtor.com, and ComeHome launched competing programs. Redfin and Rocket had already rolled out similar offerings with Compass. This signals a broader shift toward platform-controlled inventory access.
The Bigger Context: Zillow vs. Private Listings
This is especially notable given Zillow’s stance just a year ago. In 2025, Zillow banned listings not added to the MLS within one day. Positioned itself as a defender of “equal access”. Compass sued Zillow over that policy—then dropped the lawsuit immediately after Zillow launched Preview. In other words, Zillow didn’t eliminate private listings—it repackaged them at scale.
What This Means for Buyers
Buyers still have access to MLS listings across platforms. But pre-market inventory is now fragmented. To see everything, buyers will need to: Monitor multiple platforms and work more closely with agents who have access to off-MLS opportunities.
Bottom Line
Zillow Preview marks a shift from open-access listings to platform-mediated access to early inventory. For agents, it introduces new questions around control, competition, and reliance on third-party platforms. For buyers, it adds complexity to what was once a more centralized search experience. And for the industry as a whole, it signals a move toward a more segmented, platform-driven marketplace.
Author: Terry Jaszkowski
HausDoor founder.