Why Zillow Gets Wyoming Home Values Wrong — and What to Do Instead
By Jessica LaCour | Broker/Owner, 411 Properties LLC
If you own a home in Gillette or anywhere in Wyoming, you have probably looked up your Zestimate at some point.
And you have probably wondered: is that number actually accurate?
The short answer is no — and it is not Zillow’s fault exactly. It is a structural data problem specific to Wyoming that makes automated valuation tools consistently unreliable here. Understanding why matters, because buyers and sellers who make decisions based on Zillow estimates in this state frequently make costly mistakes.
Why Wyoming Is Different From Most States
Most states have what is called mandatory sale price disclosure. When a property sells, the sale price is recorded in public records and becomes accessible to anyone — including Zillow’s data team, public databases, and tools like Redfin or Realtor.com.
Wyoming does not do this. Wyoming is a non-disclosure state. When a property sells here, the sale price is not publicly recorded. The deed transfer is recorded. The fact of the sale is documented. But the price? That stays private.
This is not a new development — Wyoming has been a non-disclosure state for as long as I have been in this business. It is simply the law.
What That Means for Zillow’s Estimates
Zillow’s valuation algorithm — the Zestimate — is built on data. Lots of it. It works best when it has access to a dense set of recent comparable sale prices it can analyze to estimate what a specific home is worth.
In Wyoming, Zillow does not have access to those sale prices. It can see property characteristics — square footage, bedroom count, lot size, year built. It can see public tax assessment data, which in Wyoming is itself assessed at a fraction of market value. It can see some older or informally disclosed sale prices that make their way into the public record through various channels. But the rich, current, comprehensive sale price data it relies on in disclosure states? It does not exist here.
The result is a Zestimate that is built on partial information, extrapolated from incomplete data, and frequently off by a meaningful amount. I have seen Zillow estimates on Gillette homes that were 10, 15, even 20 percent off from where those homes actually sold. In either direction — sometimes overestimating, sometimes underestimating.
For a seller, an inflated Zestimate can lead you to overprice your home, sit on the market, and ultimately sell for less than you would have with a correctly priced strategy. For a buyer, an underestimated Zestimate can make a fairly priced home look overpriced — and you may pass on a good property because you anchored to a number that was not accurate.
Where the Real Numbers Come From
The accurate sale price data in Wyoming exists — it just is not public. It lives in the MLS (Multiple Listing Service), which is accessible to licensed real estate agents.
When I do a pricing analysis for a seller, I am using actual closed sale data from our local MLS. Real prices. Real comps. Recent transactions in the specific neighborhood, price range, and property type I am evaluating. That data tells a completely different story than what Zillow can see.
This is one of the reasons I consistently tell people in Wyoming: do not make major financial decisions based on your Zestimate. It is a starting point at best, and in our state, it is frequently not even that reliable as a starting point.
What to Do Instead
If you are a seller wondering what your home is worth: get a comparative market analysis from a licensed agent with MLS access who knows the Gillette market. That is the accurate picture. My free home value estimate uses real MLS data — not public record estimates — and takes into account the specific characteristics of your property and your neighborhood.
If you are a buyer wondering whether a home is priced fairly: the same principle applies. Your agent’s access to real comparable sales data is the tool for evaluating pricing accuracy — not Zillow, not Redfin, not any tool that relies on public sale price disclosure that does not exist in Wyoming.
The market right now in Gillette is active. My most recent listing received 10 offers. Sellers who price correctly based on real data are generating competition. Sellers who price based on inflated online estimates are sitting. The difference is the quality of the information going into that decision.
Get Real Numbers for Your Home
Call me at: 307-682-7767 or text me directly: 307-660-5470
Free home value estimate (MLS-based, not Zillow): https://www.411propertiesrealestate.com/sell/
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Jessica LaCour | Broker/Owner, 411 Properties LLC Wyoming’s #1 Broker | $764M Sold | 1,500+ Clients Served 5x RateMyAgent State Award Winner | 158K+ YouTube Subscribers Call or Text: 307-660-5470 411propertiesrealestate.com Serving Gillette, Campbell County, Crook County, Buffalo, and Sheridan.
