What is a Zestimate? Zillow's Zestimate Accuracy (2024)

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The Zestimate® home valuation model is Zillow’s estimate of a home’s market value. A Zestimate incorporates public, MLS and user-submitted data into Zillow’s proprietary formula, also taking into account home facts, location and market trends. It is not an appraisal and can’t be used in place of an appraisal.

How accurate is the Zestimate?

The nationwide median error rate for the Zestimate for on-market homes is 2.4%, while the Zestimate for off-market homes has a median error rate of 7.49%. The Zestimate’s accuracy depends on the availability of data in a home’s area. Some areas have more detailed home information available — such as square footage and number of bedrooms or bathrooms — and others do not. The more data available, the more accurate the Zestimate value will be.

These tables break down the accuracy of Zestimates for both active listings and off-market listings.

Active listings accuracy

Last updated: April 27, 2023

Off Market

Last updated: April 27, 2023


Note: The Zestimate’s accuracy is computed by comparing the final sale price to the Zestimate that was published on or just prior to the sale date.

Download an Excel spreadsheet of this data.

How is the Zestimate calculated?

Zillow publishes Zestimate home valuations for 104 million homes across the country, and uses state of the art statistical and machine learning models that can examine hundreds of data points for each individual home.

To calculate a Zestimate, Zillow uses a sophisticated neural network-based model that incorporates data from county and tax assessor records and direct feeds from hundreds of multiple listing services and brokerages. The Zestimate also incorporates:

  • Home characteristics including square footage, location or the number of bathrooms.
  • On-market data such as listing price, description, comparable homes in the area and days on the market
  • Off-market data — tax assessments, prior sales and other publicly available records
  • Market trends, including seasonal changes in demand

Currently, we have data for over 110 million U.S. homes and we publish Zestimates for 104 million of them.

FAQ

What changes are in the latest Zestimate?

The latest Zestimate model is our most accurate Zestimate yet. It’s based on a neural network model and uses even more historical data to produce off-market home valuations. This means the Zestimate is more responsive to market trends & seasonality that may affect a home’s market value. We also reduced overall errors and processing time in the Zestimate.

My Zestimate seems too low or too high. What gives?

The amount of data we have for your home and homes in your area directly affects the Zestimate’s accuracy, including the amount of demand in your area for homes. If the data is incorrect or incomplete, update your home facts — this may affect your Zestimate.

To ensure the most accurate Zestimate, consider reporting any home updates to your local tax assessor. Unreported additions, updates and remodels aren’t reflected in the Zestimate.

Check that your tax history and price history (the sale price and date you bought your home) are accurate on Zillow. If data is missing or incorrect, let us know.

Be aware that the model that creates the Zestimate factors in changing market trends, including seasonal fluctuations in demand. So in some cases that may be the reason for a change in your Zestimate.

I just listed my home for sale. Why did my Zestimate change?

When a home goes on the market, new data can be incorporated into the Zestimate algorithm. In the simplest terms, the Zestimate for on-market homes includes listing data that provides valuable signals about the home’s eventual sale price. This data isn’t available for off-market homes.

My home is on the market. Why is the Zestimate so far off?

Properties that have been listed for a full year transition to off-market valuations because they have been listed longer than normal for that local market. This can result in a large difference between the list price and the Zestimate.

I just changed my home facts. When will my Zestimate update?

Updates to your home facts are factored into the Zestimate. However, if the updates are not significant enough to affect the home’s value (eg: paint colors), your Zestimate may not change. Zestimates for all homes update multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features.

How are changes to my home facts (like an additional bedroom or bathroom) valued?

The Zestimate is based on complex and proprietary algorithms that can incorporate millions of data points. The algorithms determine the approximate added value that an additional bedroom or bathroom contributes, though the amount of the change depends on many factors, including local market trends, location and other home facts.

Is the Zestimate an appraisal?

No. The Zestimate is not an appraisal and can’t be used in place of an appraisal. It is a computer-generated estimate of the value of a home today, given the available data.

We encourage buyers, sellers and homeowners to supplement the Zestimate with other research, such as visiting the home, getting a professional appraisal of the home, or requesting a comparative market analysis (CMA) from a real estate agent.

Why do I see home values for the past?

We generate historical Zestimates for most homes if we have sufficient data to do so.

Do you ever change historical Zestimates?

We occasionally recalculate historical Zestimate values along with major data upgrades or improvements to the algorithm. These recalculations are based on a variety of considerations and, therefore, not every new algorithm release will get a corresponding update of historical values.

However, we never allow future information to influence a historical Zestimate (for example, a sale in 2019 could not influence a 2018 Zestimate). Historical Zestimates only use information known prior to the date of that Zestimate.

Does the Zestimate algorithm ever change?

Yes — Zillow’s team of researchers and engineers work every day to make the Zestimate more accurate. Since Zillow’s founding in 2006, we have deployed multiple major Zestimate algorithm updates and other incremental improvements are consistently released between major upgrades.

How often are Zestimates for homes updated?

We refresh Zestimates for all homes multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features.

Are foreclosure sales included in the Zestimate algorithm?

No. The Zestimate is intended to provide an estimate of the price that a home would fetch if sold for its full value, where the sale isn’t for partial ownership of the property or between family members. Our extensive analysis of foreclosure resale transactions supports the conclusion that these sales are generally made at substantial discounts compared to non-foreclosure sales. For this reason, the Zestimate does not incorporate data about these sales.

Who calculates the Zestimate? Can someone tamper with my home’s Zestimate?

The Zestimate is an automated valuation model calculated by a software process. It’s not possible to manually alter the Zestimate for a specific property.

Can the Zestimate be updated?

Yes. The Zestimate’s accuracy depends on the amount of data we have for the home. Public records can be outdated or lag behind what homeowners and real estate agents know about a property, so it’s best to update your home facts and fix any incorrect or incomplete information — this will help make your Zestimate as accurate as possible.

You can also add info about the architectural style, roof type, heat source, building amenities and more. Remember: updating home information doesn’t guarantee an increase in the value of Zestimate, but will increase the Zestimate’s accuracy.

Does Zillow delete Zestimates? Can I have my Zestimate reviewed if I believe there are errors?

We do not delete Zestimates. However, for some homes we may not have enough data to provide a home valuation that meets our standards for accuracy. In these instances, we do not publish the Zestimate until more data can be obtained.

The Zestimate is designed to be a neutral estimate of the fair market value of a home, based on publicly available and user-submitted data. For this purpose, it is important that the Zestimate is based on information about all homes (e.g., beds, baths, square footage, lot size, tax assessment, prior sale price) and that the algorithm itself is consistently applied to all homes in a similar manner.

I don’t know of any homes that have sold recently in my area. How are you calculating my Zestimate?

Zestimates rely on much more than comparable sales in a given area. The home’s physical attributes, historical information and on-market data all factor into the final calculation. The more we know about homes in an area (including your home), the better the Zestimate.

Our models can find neighborhoods similar to yours and use sales in those areas to extrapolate trends in your housing market. Our estimating method differs from that of a comparative market analysis completed by a real estate agent. We use data from a geographical area that is much larger than your neighborhood — up to the size of a county — to help calculate the Zestimate. Though there may not be any recent sales in your neighborhood, even a few sales in the area allow us to extrapolate trends in the local housing market.

I’m trying to sell my home and I think my Zestimate should be higher.

The Zestimate was created to give customers more information about homes and the housing market. It is intended to provide user-friendly data to promote transparent real estate markets and allow people to make more informed decisions — it should not be used to drive up the price of a home. Zestimates are designed to track the market, not drive it.

Can I use the Zestimate to get a loan?

No. The Zestimate is an automated value model and not an appraisal. Most lending professionals and institutions will only use professional appraisals when making loan-related decisions.

I have two Zestimates for my home. How do I fix this?

If you see two Zestimates for the same property, please let us know by visiting the Zillow Help Center and selecting Submit a request. You may see more than one Zestimate for your address if you are a homeowner with multiple parcels of land. Zillow matches the parcels on record with the county. If you officially combine parcels, the county will send us updated information.

What’s the Estimated Sale Range?

While the Zestimate is the estimated market value for an individual home, the Estimated Sale Range describes the range in which a sale price is predicted to fall, including low and high estimated values. For example, a Zestimate may be $260,503, while the Estimated Sale Range is $226,638 to $307,394. This range can vary for different homes and regions. A wider range generally indicates a more uncertain Zestimate, which might be the result of unique home factors or less data available for the region or that particular home. It’s important to consider the size of the Estimated Sale Range because it offers important context about the Zestimate’s anticipated accuracy.

How can real estate professionals work with the Zestimate?

Millions of consumers visit Zillow every month. When combined with the guidance of real estate professionals, the Zestimate can help consumers make more informed financial decisions about their homes.

Real estate professionals can also help their clients claim their home on Zillow, update the home facts and account for any work they have done on the property. A home’s Zillow listing is often the first impression for prospective buyers, and accurate information helps attract interest.

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What is a Zestimate? Zillow's Zestimate Accuracy (2024)

FAQs

What is a Zestimate? Zillow's Zestimate Accuracy? ›

The Zestimate® home valuation model is Zillow's estimate of a home's market value. A Zestimate incorporates public, MLS and user-submitted data into Zillow's proprietary formula, also taking into account home facts, location and market trends. It is not an appraisal and can't be used in place of an appraisal.

Why is Zillow Zestimate not accurate? ›

Zestimates may not reflect improvements, mistakes in property taxes paid, or exceptions to tax assessments. Since Zestimate also accounts for turnover rate, estimates for homes kept long periods of time may not be accurate.

How inflated is Zestimate? ›

The median error rate for a Zillow Zestimate is 7.5 percent higher than the property's actual value at the time of sale while Redfin's residential home value estimator is only off by 1.5 percent from the actual sales price.

Are zestimates usually accurate? ›

The Zestimate is often less accurate than your Realtor's estimate and can be thousands of dollars off. According to Zillow's Zestimate page, “The nationwide median error rate for the Zestimate for on-market homes is 1.9%, while the Zestimate for off-market homes has a median error rate of 7.5%.

What is more accurate than Zestimate? ›

Redfin is more accurate when valuing homes.

Both Zillow and Redfin give homes an approximate value, but the Zestimate provided by Zillow has proven slightly less accurate than Redfin's estimate. Final numbers depend significantly on the local market and demand for a property in your particular location.

How realistic is Zillow Zestimate? ›

How accurate is the Zestimate? The nationwide median error rate for the Zestimate for on-market homes is 2.4%, while the Zestimate for off-market homes has a median error rate of 7.49%. The Zestimate's accuracy depends on the availability of data in a home's area.

What is the most accurate home value estimator? ›

1. Redfin. The most accurate home value estimator is Redfin as it uses historical pricing data and also considers real-time demand and market trends. Redfin estimates are more accurate than Zillow, and the interface is intuitive, making it easy to find exactly what you're looking for.

Are zestimates too high or too low? ›

How accurate is a Zillow estimate? On a macro level, the accuracy of Zillow estimates is pretty high. It's impressive that an algorithm can estimate home values on a national scale within a 2.5% margin of error. However, most home sellers are concerned about the accuracy of Zestimates on a micro level.

Why is Zillow estimate so high? ›

The real reason is that the zestimate is trending up. I can't help but thinking that zillow's recent entry into buying and selling real estate through instant offers has anything to do with it. Zillow recently has started buying and selling properties in Denver.

How do I get my zestimate higher? ›

How to change your Zestimate. One of the easiest ways to change your Zesimate is by editing your home's facts on the site. A real appraiser will look at the features of your home to decide it's worth. Now you can update your home facts in Zillow to reflect some of the things an appraisal would typically show.

How do you know if a house is overpriced? ›

5 Signs That A House Is Overpriced
  1. It Doesn't Match The Price Of Similar Listings. ...
  2. It's Been On The Market For A Long Time. ...
  3. The List Price Doesn't Align With The State Of The Home. ...
  4. The Price Doesn't Match Your Calculations. ...
  5. The Home Hasn't Received Much Attention.
May 9, 2023

What is the Zillow scandal? ›

By spring of 2021, the market had overheated to a point where Zillow's much-lauded algorithm, the backbone of its home-flipping strategy, was struggling to make accurate pricing predictions. Believing its own inflated numbers, say analysts, the company began overpaying for homes all across the country.

Why is my zestimate lower than my neighbors? ›

If your home has more value-factors (bigger square footage, better condition, more amenities, etc) than the comparables that are pulled, then your Zestimate is likely to be lower than actual value.

Why are realtor and Zillow estimates so different? ›

Is Realtor.com or Zillow more Accurate? This is another frequently asked question from home sellers and buyers. The main difference between Realtor.com home values and Zillow Zestimates is that Zillow uses its own program to create a Zestimate, while Realtor.com uses several 3rd parties to provide multiple home values.

What if my zestimate is wrong? ›

If you believe your home's estimated value is inaccurate, you can contact the companies with updated information to correct it or sometimes fix it yourself online.

Why not to use Zestimate? ›

Zestimates are a pet peeve for many real estate agents when they differ from the asking price or the actual appraised market value of the home. They can confuse buyers who are trying to figure out what they can afford and sellers determining an asking price for their house.

How accurate is Zillow Zestimate vs Redfin? ›

Redfin's home value estimator is more accurate than Zillow's when it comes to pinpointing the sales price. According to Redfin, its estimates are approximately 74% accurate within 5% of the sales price for listed homes. By comparison, Zillow is only 67% accurate within 5% of the sale price for listed homes.

Can you change Zestimate on Zillow? ›

You can't directly change your Zestimate, but you can influence it by updating your home's information. To update your Zestimate, you need to claim your home on Zillow, then update key information such as number of bedrooms, bathrooms, and square footage.

How often do Zestimates update? ›

Zestimates for all homes update multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features.

Which property value website is most accurate? ›

Zillow is among the most popular home value websites, and its Zestimate for on-market homes (meaning, homes that are currently listed for sale) has a median error rate of 2.0% as of February 2022. This is pretty good! And bonus points for the company's transparency in explaining how their models work.

How can I guess the value of my house? ›

You can determine home value by using an online valuation tool, hiring an appraiser, using a real estate agent, or checking comparable homes in your area. Using an online valuation tool or pulling comps in your neighborhood is easy and quick, but you'll receive more accurate results using a REALTOR® or appraiser.

Which property value site is most accurate? ›

Zillow is the best overall home value estimator available. It is user-friendly and requires no log-in details. Its home value estimator is called the Zestimate, which provides an approximate value for your home based on public and user-submitted data.

Why do realtors hate zestimate? ›

Competition with real estate agents: Zillow operates a platform that allows consumers to connect with real estate agents, and the site earns revenue from leads generated through this platform. Some real estate agents see this as a threat to their business, as Zillow is essentially competing with them for clients.

Why is my house losing value on Zillow? ›

Home sales in your area are affecting the data

Zillow relies on data from neighboring homes to calculate your home value. If homes in your area are selling for under market value, that will affect your estimated home value.

Why don't all houses have zestimates? ›

Non-disclosure state — Your home is in a “non-disclosure” state (Idaho, Indiana, Kansas, Louisiana, Mississippi, Montana, New Mexico, Texas, Utah, and Wyoming) where transactions are not publicly reported and therefore, we do not have enough data to create a Zestimate.

How accurate are appraisals? ›

There's an acceptable variance when it comes to home appraisals. It usually depends on the prevailing market conditions. In markets with favorable conditions, the difference should be between 2% and 3% of the other values. For markets with challenging conditions, a 10% difference may be acceptable.

Is Zillow mortgage calculator accurate? ›

Like any free tools, Zillow and Redfin's valuation estimate tools are not 100% reliable. Homeowners upgrade homes over time, some neighborhoods have homes with comparable attributes, while other homes are more spread out and very different from their nearest neighbors.

Why is Redfin and Zillow estimates so different? ›

Most of the time, Zillow and Redfin have different estimates for your house because they have slightly different approaches to calculating home values. However, if there's a big gap between your Zestimate and Redfin Estimate, it may mean that one company has inaccurate information about your home.

Can a realtor remove a zestimate? ›

No, but you can update your home facts and fix any incorrect or incomplete information to ensure that your Zestimate is as accurate as possible.

What month is the best to sell a house? ›

Spring is typically when most home selling activity begins, but home sales really heat up in the summer months. Real estate is all about location, though, and where you live may have an impact on the peak selling season for your home.

What justifies higher house prices? ›

Demand has long exceeded supply of homes for sale in California, and that's especially true now. But while many families are suffering the economic impacts of COVID-19, wealthier households with money to spend and capitalizing on low interest rates have driven up prices even more.

How long do most houses stay on the market? ›

After your home is listed, your real estate agent can schedule showings and greet potential buyers when they visit the property. Although the average home sits on the market for about 22 days, it could take more time or less before you accept an offer. The days on market can also depend on when you list your home.

What mistake did Zillow make? ›

Zillow, an online real estate marketplace, recently shuttered its Zillow Offers business because of failed iBuying algorithms. A derailed algorithm on property valuations led the company to reduce the estimated value of the houses it purchased in Q3 and Q4 by more than $500 million.

Are some Zillow listings fake? ›

Often, these scams involve properties being listed for rent on the internet by scammers who do not own the properties or don't have the authority to rent the property out. Scammers often list properties on websites like Zillow, Craigslist, or Facebook. This scam can take different forms.

Why did Zillow quit buying houses? ›

Zillow was unable to accurately forecast the price of homes and said the business ultimately required too much capital. Now, Zillow users will still be able to get an instant cash offer for their home, but the transaction is facilitated by Opendoor.

Can you update a zestimate? ›

Zillow Zestimates are automated, so you won't be able to directly edit your Zestimate. But you can update detailed information about your home, such as amenities, square footage, or remodeling, which Zillow will take into account.

Why is my home losing value? ›

Some factors, such as property maintenance and improvements, are in your control. Other times, factors outside your control, such as the property market, natural disasters, and changes in your neighborhood, might be bringing down the value of your home.

How do I increase my views on Zillow? ›

A virtual tour is a must-have and may actually help your listing get more views and saves. Based on data collected between November 2021 and January 2022, listings with a Zillow 3D Home® tour got, on average, 43% more views on Zillow and were saved by buyers 55% more than listings without.

Are Zillow values correct? ›

Zestimates are generally quite accurate. The median error rate for the Zestimate of U.S. houses on the market is just 1.9 percent. The median error rate for houses that are not on the market is higher, at 6.9 percent, but still close enough to do your preliminary planning.

How accurate are Redfin estimates? ›

The Redfin Estimate is highly accurate, with a current median error rate of just 2.10% for homes that are for sale, and 6.41% for off market homes. This means that when a home that is currently on the market sells, the Redfin Estimate will be within 2.10% of the sales price half of the time.

Is Corelogic accurate? ›

Instant, highly accurate valuations on more properties

Our market-leading AVM (Automated Valuation Model) delivers a high level of accuracy and hit-rate, including for hard-to-value properties.

What is the zestimate based on? ›

What is a ZestimateⓇ? Zillow's Zestimate is an estimate of value using a proprietary formula created by the online real estate database company. Zestimates cover more than 100 million homes across the United States. A Zestimate is calculated from physical attributes, tax records, and user submitted data.

Is zestimate close to appraisal? ›

The Zestimate is not an appraisal and it should be used as a starting point. We encourage buyers, sellers and homeowners to supplement the Zestimate with other research such as visiting the home, getting a professional appraisal of the home, or requesting a comparative market analysis (CMA) from a real estate agent.”

Why is my Zillow estimate higher than Redfin? ›

Most of the time, Zillow and Redfin have different estimates for your house because they have slightly different approaches to calculating home values. However, if there's a big gap between your Zestimate and Redfin Estimate, it may mean that one company has inaccurate information about your home.

What hurts a home appraisal? ›

Updating appliances or any major systems, like plumbing, electrical or HVAC, can be costly, so if yours are outdated, it could affect the overall value of the home. And if the interior hasn't been changed for decades, it may not appeal to buyers, which can also cause the value to decrease.

Do banks use Zestimate? ›

It's also important to note that automatic valuations such as a Zillow Zestimate are not used by banks or lenders to estimate a property's value for a mortgage. Only an appraisal from a licensed appraiser can be used for a mortgage.

Why are Zillow estimates so low? ›

It's likely that all homes have a lower estimated Zestimate than actual value. So, on the basis of time frame, Zillow is picking bad comparables. If your Zestimate includes homes that were sold over 3 months ago, that's going to be one key reason your Zestimate is so low.

Why did my zestimate drop drastically? ›

If your Zestimate is off, it might be because Zillow is missing some information about your house. Fill in the gaps by accurately describing the features of your house, checking off all of your home's amenities in your profile, and reporting any updates to a tax assessor.

Are there fake listings on Zillow? ›

If you find a fraudulent listing on Zillow, please return to the listing page and click “Report Listing” and select “Listing seems to be fraudulent or illegal.” If you believe you have been scammed, report it to the FTC.

Are Zillow estimates too high or too low? ›

How accurate is a Zillow estimate? On a macro level, the accuracy of Zillow estimates is pretty high. It's impressive that an algorithm can estimate home values on a national scale within a 2.5% margin of error. However, most home sellers are concerned about the accuracy of Zestimates on a micro level.

Why is my zestimate not changing? ›

If the updates are not significant enough to impact the home's value, your Zestimate may not change. Zestimates for all homes update multiple times per week, but on rare occasions this schedule is interrupted by algorithmic changes or new analytical features.

How do I update my Zillow zestimate? ›

You can't directly change your Zestimate, but you can influence it by updating your home's information. To update your Zestimate, you need to claim your home on Zillow, then update key information such as number of bedrooms, bathrooms, and square footage.

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