Zillow “Zestimate” Accuracy

How accurate is the Zillow "Zestimate" for King and Snohomish Counties? See the graphs below to find out.

The home data we have compiled to generate a Zestimate home valuation varies by location. Some counties provide all the data we could hope for, but others are lacking such key things as the number of bedrooms and bathrooms, or, in some cases, the square footage of the home. The more data we have, the more accurate the Zestimate. And, we've made it easier for our users to help us improve accuracy by incorporating edited home facts into our Zestimate calculations. In some areas, we might not be able to produce a Zestimate at all, but we do have some basic information on the homes. The tables below show you where we have Zestimates and other home information.

To measure the accuracy of the Zestimates, we've gone back in time and compared the historic Zestimates with the actual transaction prices of homes that sold. The tables below also provide various measures of that accuracy.

– Zillow.com

If you are considering selling your home and want to find out what the fair market value is, give us a call, text or email. We would be happy to provide you with a free market analysis; no obligation, of course!