Selling models and market structure

Non-disclosure states and the data gap

6 min read

Where sale prices never reach the public record, every automated estimate is guessing with one eye closed.

The short version

A non-disclosure state is one where the final sale price of a home is not recorded as public information. Roughly a dozen states work this way, with Texas the largest. Automated valuation models are trained and corrected against recorded sale prices, so where those prices are withheld the models fall back on listing prices, tax assessments, and whatever partial data they can license, and their accuracy degrades. The sold prices still exist, inside the MLS databases that licensed agents use every day. In these states the gap between the algorithm and the agent is not a matter of skill. It is a matter of access.

What a non-disclosure state is

Most states record the sale price of a home as public information when the deed transfers. A non-disclosure state does not. The transfer itself is recorded, but the price is withheld from the public record. The states commonly listed as non-disclosure are Alaska, Idaho, Kansas, Louisiana, Mississippi, Montana, New Mexico, North Dakota, Texas, Utah, and Wyoming, with Missouri partly non-disclosure at the county level. The list shifts at the margins over time, but the structural fact does not: in these states, the single most important number in residential valuation never enters the public data that models feed on.

What the models lose

An automated valuation model is trained and corrected against closed sale prices. Take those away and the model still runs, but on a thinner diet.

Data input	Disclosure state	Non-disclosure state
Recorded sale price	Public record at the county	Withheld from the public record
Listing price	Public	Public, but a list is not a close
Tax assessed value	Public, built for taxation	Public, built for taxation, often further from market
MLS sold price	Available to licensed members	Available to licensed members
Model ground truth	Real closed prices	Proxies, assessments, and licensed fragments

How the tools cope, and why it shows

In non-disclosure states the models substitute. Listing prices stand in for sale prices, though a list is an ask, not a close, and the gap between the two moves with the market. Tax assessments stand in for value, though they are built for taxation and lag the market by design. Some price data arrives through listing feeds and user submissions, which is partial and uneven. The estimate that comes out the other end looks exactly as confident as one built on real closed prices, which is the quiet problem: the number does not announce its thinner diet. Even in full-disclosure states the published off-market median error runs near 7.5%, roughly $45,000 on a $600,000 home; withholding the closed prices only widens it. It is the same failure surface described in what a Zestimate cannot see, widened from one home to an entire state.

Who holds the ground truth

The closed prices exist. They sit in the MLS, reported by the agents who closed the deals and available to licensed members and appraisers. In a disclosure state, the public record eventually catches up to what the MLS already knows. In a non-disclosure state it never does, so the real comparable sales, the input every method depends on, live behind a professional license. That is a structural line, not a skill line, and it is why the standard model machinery breaks hardest exactly where the agent holds the most.

What this means for an agent

In a non-disclosure state you are not competing with the algorithm on skill. You hold data it cannot buy. The move at a listing appointment is to make that visible: put the real closed prices from the MLS next to the automated estimate, and let the seller see which one is standing on the actual market. Explain, once and plainly, that the online number was built without the sale prices, because in this state those are not public. Then price the home on the sales you can prove. The agent-side play, showing a client what the automated number could not see about their specific home, is the basis of our home-value accuracy page.

Frequently asked questions

What is a non-disclosure state in real estate?

It is a state where the final sale price of a home is not part of the public record. The deed transfer is recorded, but the price is withheld, so public data sources and the models built on them do not see what homes sold for.

Which states are non-disclosure states?

The states commonly listed are Alaska, Idaho, Kansas, Louisiana, Mississippi, Montana, New Mexico, North Dakota, Texas, Utah, and Wyoming, with Missouri partly non-disclosure by county. The list can shift at the margins, so confirm current status for a specific state.

Why are automated estimates less accurate in Texas?

Because Texas does not make sale prices public, and automated models are built and corrected against recorded sale prices. Without them, the models lean on listing prices, tax assessments, and partial licensed data, and their errors widen.

Can Zillow see actual sale prices in non-disclosure states?

Not from public records, because the prices are not there. Some sale data reaches portals through listing feeds and user submissions, but it is partial and uneven, which is why estimates in these states rest on proxies more than on closed prices.

How do agents price homes in non-disclosure states?

Through the MLS, where closed sale prices are reported and available to licensed members. Agents and appraisers work from the real comparable sales, which in a non-disclosure state is exactly the data the public models are missing.

Sources: State recording and disclosure practice as summarized by county recorder and title industry references, published automated valuation methodology notes on the role of recorded sale prices, and MLS data-access policies for licensed members. State lists shift at the margins; confirm current status for a specific state.

This article is general information and analysis, not financial, lending, or appraisal advice. Verify any home value with a licensed professional before acting.