Is the Zestimate Accurate in Columbus, Ohio? Zillow's Own Table Says Within $29,000

Short answer: for a Columbus home that is not on the market, Zillow's own accuracy data says the typical Zestimate misses by about 8.2 percent, roughly $29,000 on the median house. That is not my estimate of their estimate. Zillow publishes an accuracy table, updates it monthly, and the most recent refresh puts the median off-market error in Ohio at 8.23 percent, with only a third of homes landing within 5 percent of their eventual sale price.

If you have heard the Zestimate is accurate to about 2 percent, you heard the on-market number, and the difference between those two figures is the entire story. It decides whether that number on your phone is a useful anchor or a $29,000 coin flip, so here is the whole thing, sourced to Zillow's own published data.

What Does Zillow Actually Publish About Accuracy?

Zillow maintains a public accuracy page comparing Zestimates to the prices homes actually sold for, and it reports two very different situations.

Homes actively listed for sale: the Zestimate tracks the eventual sale price closely. In the current table, Cincinnati shows a 1.83 percent median error and Cleveland 2.31 percent for active listings.

Homes not on the market: the numbers change completely. For Ohio, the current table shows:

Ohio, off-market homes	Zillow's published figure
Median error	8.23%
Homes with Zestimates	4.3 million
Within 5% of sale price	33.8%
Within 10% of sale price	57.1%
Within 20% of sale price	78.9%

Read the last row again from the other side: about 21 percent of off-market Ohio homes have a Zestimate more than 20 percent away from what they sell for. One home in five, off by a fifth of its value or more.

One more detail worth knowing: Columbus does not appear in Zillow's top-metro accuracy table at all. Cincinnati is there, Cleveland is there, and the market where you are pricing your house is not separately reported, which is why the Ohio state row is the closest published number you can get.

Why Is the On-Market Number So Much Better?

This is the part almost nobody quotes, and it comes straight from Zillow's own methodology notes.

For listed homes, the Zestimate incorporates the listing price itself, along with listing details and market activity. The algorithm is not independently discovering what your house is worth. It is adjusting toward a number a seller and an agent already set, then getting graded on how close it landed.

That is not cheating. It is sensible modeling, and Zillow describes it plainly. But it means the impressive 2 percent figure measures how well the algorithm follows a price a human produced. The 8.23 percent figure measures what it does alone, and alone is exactly the situation you are in when you check your Zestimate before deciding whether to sell.

What Does an 8.23 Percent Miss Cost in Columbus?

Translate Zillow's Ohio numbers onto the Columbus market. Across the 17,759 closings recorded in our MLS this year, the May median sale was $350,000. On that home:

Zillow's published band	Share of off-market homes	On a $350,000 home
Within 5%	33.8%	inside ±$17,500
Within 10%	57.1%	inside ±$35,000
Within 20%	78.9%	inside ±$70,000
Beyond 20%	21.1%	off by MORE than $70,000

The median miss is about $28,800. A third of homeowners are looking at a number within $17,500 of the truth. One in five is looking at a number that is wrong by more than $70,000, and the interface displays all of them with the same confident font.

Does It Miss High or Miss Low?

Both, and the direction is the expensive part.

If your Zestimate runs low and you anchor to it, you underprice, and in this market that mistake executes fast: the median 2026 Columbus listing went under contract in 11 days.

If it runs high and you anchor to it, you overprice, and I have measured what that costs here: homes that sold in their first week this year captured a median 100 percent of original asking price, while homes that sat 30 days or more settled for 94.2 percent. Nearly six points, roughly $20,000 on the median house, lost to a bad opening number.

Either direction, the anchor is the decision. An 8 percent anchor error feeds directly into the most expensive pricing mistake a seller can make.

Why Can't an Algorithm Price Your Specific House?

Because the inputs it prices from are records, and records do not walk the property.

I grew up in a line of German carpenters and I read houses the way my grandfather did. The things that move a specific sale price, the renovated kitchen versus the 1994 one, the layout that flows versus the one that chops, the basement that smells like a basement, the roof at year 24, the lot that backs to trees versus the one that backs to a parking lot, none of that is in the tax record. Two houses identical on paper routinely sell $50,000 apart, and the paper is all the model has for an off-market home.

Zillow says a version of this itself: accuracy depends on the depth and quality of available data. In a market like Columbus, with housing stock running from 1890s doubles to last year's builds, the paper misses a lot.

Which Home Value Website Is the Most Accurate?

The question people actually type, so here is a straight answer without a rigged bake-off.

Every automated estimate, Zillow's, Redfin's, Realtor.com's, your bank's, is built the same way: public records, prior sales, and MLS feeds, run through a model. They differ at the margins, and the rankings you find comparing them are mostly affiliate content built to earn a click, which is why I am not quoting their numbers here.

Two things matter more than the brand.

The situation matters more than the site. Every one of these tools is dramatically better on listed homes than unlisted ones, for the same reason Zillow's is: once a listing exists, the model gets the asking price and current comparables to lean on. Whichever site you prefer, the number on your unlisted home is the weak version.

Credit where due: Zillow is the one showing its work. A monthly, metro-level, exportable accuracy table is more transparency than any competitor offers, and it is the only reason this article can exist. The irony is that the table is also the clearest published evidence of what these tools cannot do for an off-market house.

So the accurate site is not a site. For an unlisted Columbus home, every algorithm is playing the same handicapped game, and Zillow has simply published the score.

How Should You Actually Use Your Zestimate?

Use it as a wide bracket, never a price. By Zillow's own Ohio table, the honest way to read a $350,000 Zestimate on an unlisted home is "most likely somewhere between about $321,000 and $379,000, with a one-in-five chance it is outside $280,000 to $420,000."

Watch the trend, not the level. The month-to-month direction of the estimate tracks the market reasonably well even when the level is off.

Never negotiate off it, in either seat. Sellers should not set a list price from it, and buyers should not judge a listing as overpriced or underpriced against it. Both are pricing off a number the model itself reports as ±8 percent.

Get a real number before making a real decision. The moment the question changes from curiosity to "should we sell," the tool for the job changes too.

What Is the Accurate Way to Price a Columbus Home?

Comparable sales, chosen and adjusted by someone who has seen the house. Recent closings on similar streets, similar condition, similar size, from the last few months, with adjustments a model cannot make because it has never stood in the kitchen.

That is what I build for every seller before we talk price, and it is the number the week-one data above rewards: priced right, Columbus homes this year sold in days and captured full ask.

Start with a real home value estimate, built from comparable sales rather than an algorithm. If you want the full walkthrough of what your street's numbers look like, comment or DM the word NUMBER and I will run it, whether or not you are listing this year.

For the decision that usually follows this one, I also measured what a cash offer really costs a Columbus seller, from 3,331 recorded cash sales.

Contact Adam Geuy at NextHome Experience, or grab a time at calendly.com/adam-geuy.