List once on the MLS. Appear on the sites buyers already use.
Syndication is the automatic distribution of MLS listing data to public real estate portals and brokerage websites. Here is how it works, when your listing shows up, and what to do if it hasn't.
The MLS is the source. The portals are the storefronts.
Syndication is the licensed sharing of MLS listing data with public real estate websites. Your local MLS maintains agreements with portals and brokerages, and sends them a structured feed containing your address, price, photos, description, and status.
You never post to Zillow, Redfin, or Realtor.com individually. The listing is entered once in the MLS that covers your property, and the feed distributes it. That is why a flat fee MLS listing produces the same portal exposure a full-service listing does — the distribution pipe is identical.
Each portal decides how it displays what it receives. Search ranking, map placement, badge labels, and refresh frequency are the portal's choices, not the MLS's. The MLS controls the accuracy of the data; the portals control the presentation.
From an Active MLS record to a live listing on the major portals.
The listing broker enters your property in the MLS that covers your address. Nothing syndicates until the status is Active.
The MLS transmits listing data — address, price, photos, remarks, status — to the portals and brokerages it has syndication agreements with.
Zillow, Redfin, Realtor.com, and others ingest the feed and publish your home in their default for-sale search results.
Price changes, new photos, and status updates are made in the MLS and pushed out on the next feed refresh.
Portal by portal, what sellers can expect and roughly when.
The largest consumer portal in the U.S. MLS-sourced listings appear in the standard 'For Sale' results, separate from Zillow's FSBO category. Zestimate and saved-search alerts apply to MLS listings.
Redfin is an agent-owned brokerage and portal that sources for-sale inventory primarily from MLS feeds. Listings show up in map search, email alerts, and Redfin's tour request flow.
Operated in partnership with the National Association of REALTORS® and built on MLS data. Realtor.com is often the fastest to reflect MLS status changes because it pulls directly from MLS sources.
Zillow-owned portal that receives the same MLS-syndicated data, paired with neighborhood and school information.
National portal with listings sourced from MLS feeds and broker partners, plus agent and neighborhood profiles.
Coldwell Banker, RE/MAX, Keller Williams, and thousands of local broker websites display MLS listings through IDX feeds — a major source of buyer traffic people forget about.
Timing is typical, not guaranteed. Each MLS and each portal sets its own feed schedule and display policies.
Distribution is the part of selling that most affects how many buyers see your home.
Most buyers start online and most buyers work with an agent. Syndication covers the first group; the MLS itself covers the second. A listing that lives only on one FSBO site misses both audiences at once.
Syndication also drives the alerts that create early momentum. Saved searches on Zillow, Redfin, and Realtor.com fire when a new MLS listing matches a buyer's criteria — which is why the first 72 hours after going Active usually generate the heaviest traffic.
Because everything flows from one MLS record, accuracy at entry matters. Clean photos, correct square footage, and a complete description are copied everywhere your listing appears.
What you get from one MLS listing versus manual FSBO posts.
Four things to check before assuming something went wrong.
Portals refresh on their own schedule. Under 24 hours after going Active, the most likely answer is simply that the next refresh hasn't run.
Listings in Incomplete, Coming Soon, or Hold status generally do not syndicate. Only an Active record is distributed.
Portals match MLS records against public records. A unit number, street suffix, or APN mismatch can delay publication until it is corrected in the MLS.
New listings sometimes publish before they are indexed into map and filter results. Searching the full street address often finds a live listing that a filtered search misses.
What sellers ask about MLS syndication and the major portals.
Get your home on the local MLS and let syndication carry it to Zillow, Redfin, Realtor.com, and the broker sites buyer agents use every day.
See pricing and coverage for your state.
