Housing markets at the local level show similar trends. Many of the counties with the highest increases in home prices were high-growth locales like Travis County, TX (Austin) and Maricopa County, AZ (Phoenix), which have emerged as more affordable alternatives to more expensive cities on the coasts. The list of counties with the biggest home price increases also includes many suburban counties of major metro areas, like San Joaquin County, CA (east of the Bay Area), Snohomish County, WA (Seattle), and Gwinnett County, GA (Atlanta).
The data used in this analysis is from Zillow Group’s Zillow Home Value Index (ZHVI) and the U.S. Census Bureau’s American Community Survey. To identify the counties with the largest home price increases in 2021, researchers at Inspection Support Network calculated the percentage change in the ZHVI between October 2020 and October 2021. In the event of a tie, the county with the larger absolute price increase was ranked higher. To improve relevance, counties were grouped into the following cohorts based on population: small (200,000–349,999), midsize (350,000–749,999), and large (750,000+).
Here are the counties with the biggest home price increases in 2021.