Your home does not start on Zillow. It starts in an MLS, the database agents work in every day, and from there it spreads to member agents' websites and then out to the big portals and any other publications you approved when you signed your listing agreement. Most sellers never see that map. Here it is.
It starts in an MLS, and everything else is a copy
There are hundreds of MLSs across the country. Your broker enters your home in the one their firm belongs to. That entry is the original. Agents search it, set buyer alerts in it, and schedule showings from it. Zillow, Realtor.com, Redfin, and Homes.com all run on copies of that entry, and copies update on each site's own schedule. That is why a portal can lag behind a price change or keep showing old photos. The fix is never made on the portal. Your broker corrects the MLS entry, and the correction flows out to every copy.
In between sits a layer most sellers never hear about. MLS members agree to display each other's listings on their own websites, a system called IDX. So your home also appears on the personal and brokerage websites of member agents across your market, not just on the national portals.
Your signature decides where else it goes
Syndication is a choice, not a requirement. When you sign a listing agreement, you set the permissions: internet display or not, which kinds of sites may carry your home, and extras like the automated value estimates some sites attach to a listing. You can opt out of a channel, and you can keep your home off the internet entirely if privacy matters more than reach. The framework is national, set by MLS policy, but the switches are local. Each MLS sets its own defaults, and each state's listing agreement words your authorizations its own way.
One warning belongs on every seller's list. Agents only see, inside their own MLS, the listings entered in services they belong to. If your broker puts your home in a big out-of-area service instead of the one your local firms use, those firms can be blind to it in the saved searches and buyer alerts they run daily. Ask which MLS your home is going into, and whether the firms holding the local buyers belong to it.
Questions sellers ask me
Does my home go on Zillow automatically?
Usually, through syndication. But it is a setting you and your broker control, not a law.
Why is the price wrong on one of the big sites?
That site runs on a copy that has not caught up. It gets fixed once, at the MLS source.
If I sell it myself, where does it show up?
Only where you post it by hand. No MLS entry means no member websites and no portal syndication.
Before you sign, ask three questions: which MLS, which websites, and what did I just authorize? If you are selling in the High Country and want to walk that map first, start here: johnblevinsrealtor.com/sell.
John Blevins, Broker-in-Charge | Regency Properties | West Jefferson, NC | NC License #322850
Sources: National Association of REALTORS®, Handbook on Multiple Listing Policy, IDX Policy Statement 7.58 (broker reciprocity); MLS listing distribution and syndication guides (seller authorization, opt-out, and channel controls). No market statistics used. Syndication defaults and seller-consent mechanics vary by MLS and by state listing agreement.
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