Data Coverage and Zestimate® Accuracy

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.

What's a Zestimate?

A Zestimate home valuation is Zillow's estimated market value. It is not an appraisal. Use it as a starting point to determine a home's value. Learn more.

  • Virginia Counties

Virginia

CountyZestimate AccuracyHomes on ZillowHomes With ZestimatesWithin 5% of Sale priceWithin 10% of Sale PriceWithin 20% of Sale PriceMedian Error
Lee7.1K7.1K--------
Bath2.8K1.1K--------
Page10.7K10.2K--------
Wise10.8K5.4K--------
York19.8K19.8K65.2%92.4%97.0% 3.7%
Bland2.7K2.3K--------
Craig4.0K3.7K--------
Essex4.8K4.2K--------
Floyd4.7K4.7K--------
Giles7.0K6.6K--------
Henry20.2K19.6K--------
Salem City8.5K8.5K--------
Scott12.3K12.1K--------
Smyth9.9K9.9K--------
Surry4.5K4.5K--------
Wythe6.8K5.4K--------
Amelia7.1K7.1K--------
Clarke4.7K4.1K--------
Greene5.5K5.3K--------
Louisa15.4K15.4K47.6%69.8%82.5% 5.2%
Nelson8.9K8.9K--------
Orange17.6K17.6K40.0%67.1%87.1% 6.5%
Sussex11--------
Warren14.2K14.2K36.1%62.5%86.1% 7.1%
Amherst12.6K9.6K--------
Augusta27.0K27.0K--------
Bedford21.6K21.6K--------
Bristol City7.0K5.7K--------
Carroll12.6K12.6K--------
Fairfax338.1K338.1K58.2%84.2%94.7% 4.2%
Grayson7.7K7.1K--------
Halifax13.3K9.3K--------
Hanover40.1K40.1K53.8%77.2%92.4% 4.5%
Henrico104.2K104.2K41.1%64.0%85.8% 6.8%
Loudoun108.4K108.4K58.2%76.3%87.0% 3.9%
Madison5.3K5.1K--------
Mathews4.8K1.9K--------
Patrick7.8K6.0K--------
Pulaski12.0K11.8K--------
Roanoke41.8K41.8K--------
Russell2727--------
Accomack17.2K6.6K--------
Buchanan22--------
Campbell18.1K18.1K--------
Caroline21.9K11.4K40.5%64.3%90.5% 6.0%
Culpeper18.7K18.7K37.5%66.2%87.5% 6.7%
Fauquier27.0K27.0K44.9%69.0%87.3% 5.7%
Fluvanna10.0K9.0K48.6%73.0%83.8% 5.1%
Franklin26.1K26.1K27.6%55.2%77.6% 8.3%
Highland1.5K1.1K--------
New Kent7.7K7.4K--------
Nottoway4.6K4.1K--------
Powhatan9.9K9.9K--------
Richmond2.4K1.5K--------
Stafford41.9K41.9K57.1%81.0%94.4% 4.2%
Tazewell15.4K10.3K--------
Albemarle34.2K33.5K--------
Alleghany7.5K7.5K--------
Arlington62.9K62.9K51.8%76.0%88.3% 4.7%
Botetourt17.5K17.5K--------
Brunswick3.6K3.6K--------
Charlotte3.1K3.1K--------
Dickenson22--------
Dinwiddie13.5K13.5K--------
Frederick29.1K27.5K60.6%81.8%93.9% 4.7%
Goochland8.7K8.7K--------
Lancaster7.7K5.2K--------
Lunenburg4.3K2.4K--------
Middlesex7.2K7.2K--------
Appomattox5.6K4.3K--------
Buckingham4.4K4.4K--------
Cumberland4.5K4.5K--------
Galax City77--------
Gloucester15.4K15.4K--------
James City26.5K26.5K--------
Montgomery26.7K20.4K--------
Rockbridge7.9K7.7K--------
Rockingham23.9K20.5K--------
Shenandoah17.9K14.1K33.3%64.7%82.4% 7.0%
Washington22.2K21.2K--------
Greensville3.6K3.1K--------
King George8.0K8.0K--------
Mecklenburg14.8K8.2K--------
Northampton5.5K2.3K--------
Norton City00--------
Southampton6.8K6.1K--------
Bedford City2.1K2.1K--------
Charles City3.1K3.1K--------
Chesterfield120.0K120.0K50.8%77.8%89.1% 4.9%
Emporia City2.1K1.1K--------
Fairfax City7.6K7.6K58.5%82.9%97.6% 4.1%
Hampton City44.2K44.2K43.2%73.5%90.2% 6.2%
King William5.6K5.6K--------
Norfolk City58.5K58.5K--------
Pittsylvania21.5K21.5K--------
Radford City3.1K3.1K--------
Rappahannock4.2K4.2K--------
Roanoke City34.8K34.6K38.9%61.1%79.0% 7.2%
Spotsylvania55.9K55.3K56.7%80.3%90.9% 4.2%
Suffolk City30.4K30.4K--------
Westmoreland7.9K5.5K--------
Danville City25.1K18.5K--------
Franklin City2.7K2.7K--------
Hopewell City8.4K8.4K--------
Isle of Wight14.9K13.5K--------
Manassas City11.1K11.1K52.9%77.5%92.2% 4.8%
Poquoson City4.0K4.0K--------
Prince Edward5.3K5.3K--------
Prince George9.6K9.6K--------
Richmond City64.4K64.4K42.1%63.9%85.0% 6.3%
Staunton City8.5K7.3K--------
Covington City2.7K2.6K--------
King and Queen55--------
Lexington City1.9K1.9K--------
Lynchburg City21.9K21.9K--------
Northumberland7.4K3.7K--------
Prince William121.6K121.6K61.0%83.7%95.0% 3.7%
Alexandria City41.1K41.1K51.2%78.9%90.1% 4.9%
Chesapeake City77.7K75.6K57.7%84.3%95.1% 4.3%
Petersburg City11.0K8.2K--------
Portsmouth City29.8K29.8K42.6%70.4%87.8% 5.8%
Waynesboro City7.2K7.2K--------
Winchester City7.2K6.1K--------
Buena Vista City2.5K2.5K--------
Falls Church City4.5K4.4K64.7%82.4%94.1% 3.2%
Harrisonburg City11.3K11.0K--------
Martinsville City3.5K3.5K--------
Newport News City49.3K49.1K50.5%82.4%94.5% 5.0%
Williamsburg City4.2K3.7K--------
Clifton Forge City00--------
Manassas Park City4.4K4.4K62.1%86.2%96.6% 3.4%
Fredericksburg City6.1K6.1K45.2%64.5%90.3% 6.5%
Virginia Beach City149.6K149.6K49.2%77.8%92.3% 5.1%
Charlottesville City12.6K12.6K--------
Colonial Heights City6.5K5.6K--------

Last updated: June 04, 2014
Note: Zestimate accuracy is computed by comparing the final sale price to the Zestimate on or before the sale date. The data herein is computed for the three-month period ending March 31st, 2014.

Click here to download an Excel spreadsheet of this data.

Definitions

Zestimate Accuracy/Star Rating:
This rating is tied to the Median Error in an area.
The ratings are as follows:
  • Four Stars = Best Zestimate
  • Three Stars = Good Zestimate
  • Two Stars = Fair Zestimate
  • One Star = Tax assessor's value, or unable to compute Zestimate accuracy
  • 0 stars = No valuation
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Tax Assessor's Value

Depending on the jurisdiction where you live, this value could be the tax assessed, tax appraised, or market assessed value. This value comes from the taxing authority of the city, county or state where you live; this is not Zillow's value.

Note: Tax assessor's values differ from Zillow's Zestimate, which is computed by entering numerous data points into a proprietary formula, often resulting in a more accurate value estimate.

Homes on Zillow:
This indicates the percentage of homes for which we have data (e.g., number of bedrooms or bathrooms) in a particular locale. These are the homes you can find via maps or search on Zillow.com.
Homes With Zestimates:
We can only calculate Zestimates for homes where we have certain data, including transactions. This column indicates the percentage of homes in an area with Zestimates.
Within 5% of Sale Price:
This is the percentage of transactions in a location for which the Zestimate was within 5% of the transaction price. For example, in the Portland area, 43.4% of the time the Zestimate was within 5% of the selling price.
Within 10% of Sale Price:
This is the percentage of transactions in a location for which the Zestimate was within 10% of the transaction price.
Within 20% of Sale Price:
This is the percentage of transactions in a location for which the Zestimate was within 20% of the transaction price.
Median Error:
Half of the Zestimates in an area were closer than the error percentage and half were farther off. For example, in Seattle, Zestimates for half of the homes are within 6.6% of the selling price, and half are off by more than 6.6%.