What is a Zestimate?
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.
Active listings accuracy
Off Market
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.
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.
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?
My home is on the market. Why is the Zestimate so far off?
I just changed my home facts. When will my Zestimate update?
How are changes to my home facts (like an additional bedroom or bathroom) valued?
Is the Zestimate an appraisal?
Why do I see home values for the past?
Do you ever change historical Zestimates?
Does the Zestimate algorithm ever change?
How often are Zestimates for homes updated?
Are foreclosure sales included in the Zestimate algorithm?
Who calculates the Zestimate? Can someone tamper with my home’s Zestimate?
Can the Zestimate be updated?
Does Zillow delete Zestimates? Can I have my Zestimate reviewed if I believe there are errors?
I don’t know of any homes that have sold recently in my area. How are you calculating my Zestimate?
I’m trying to sell my home and I think my Zestimate should be higher.
Can I use the Zestimate to get a loan?
What’s the Estimated Sale Range?
How can real estate professionals work with the Zestimate?
