Methodology

Dec. New and Existing Home Sales Forecast Methodology January 22, 2015

Zillow expects new home sales and existing home sales to move in opposite directions in December.  New home sales are expected...

For Your Perusal: Presenting Zillow’s Pleasant Days Processes & Procedures December 16, 2014

As part of a recent analysis, Zillow dove into federal weather data to estimate the average number of pleasant days per year...

Methodology: Home Sales September 23, 2014

Overview Zillow is releasing a new sales metric providing the number of new and existing home sales across the country....

A Guide to the Zillow Housing Confidence Index March 12, 2014

Today, we released the first edition of the Zillow Housing Confidence Index (ZHCI), sponsored by Zillow and developed and administered...

The Ups and Downs of Rising and Falling Inventory February 19, 2014

The real estate market, like all markets, is sensitive to changes in supply and demand. This month, Zillow is releasing a new inventory...

Revisions to the ZHVI Methodology January 3, 2014

With the release of November 2013 Zillow Home Value Index (ZHVI) data, we have made a number of methodological changes that...

Zillow Home Value Index: Methodology January 3, 2014

Introduction In setting out to create a new home price index, a major problem Zillow sought to overcome in existing indices...

Market Health Index Methodology December 13, 2013

The Market Health Index, an ordinal measure ranging from 0 to 10, illustrates the current health of a region’s housing...

Days on Market, the Long and the Short of it November 13, 2013

With our extensive database of home sales and listings, we’ve long wanted to provide comprehensive and detailed data on the number...

Zillow Home Value Forecast: Methodology January 24, 2013

Zillow forecasts the change in the Zillow Home Value Index (ZHVI) over the next 12 months, called the Zillow Home Value Forecast....