Florida has 1 of the 20 counties that have seen the biggest growth in housing over the last decade

For the last couple of years, headlines about the housing market have dominated the news cycles. From housing shortages to sky-high home prices, we’ve all heard about how the pandemic has affected nearly every housing market across the nation. Many of us have experienced the phenomenon firsthand. But while the pandemic has certainly had an impact on the housing market, there are plenty of other factors that have spurred housing growth in counties across the nation—and these factors aren’t as widely discussed.

Take, for example, the massive impact the oil boom has had on housing in the Midwest. Between 2007 and 2012, employment in North Dakota’s oil and gas industry increased by 354%, resulting in a 19% population growth in western North Dakota alone. As oil companies—and oilfield employees—continue to move in, sleepy towns and counties have been upended by the sudden influx of residents. While more jobs may boost the economy, the rapid growth can also leave cities struggling to keep up with demands for health services, roads, transportation, and housing.

So which counties have seen the biggest housing growth over the last decade—and why? Better Mortgage, an online lender and homeownership platform with a free mortgage calculator, used data from the U.S. Census Bureau's decennial census to calculate which counties have seen the greatest increase in housing units over the last 10 years. The counties are ranked according to the percent change in housing units between 2010-2020, and the top 20 counties with the biggest growth in housing were selected for the national story. Census data on housing was released on August 12, 2021 for all counties in America. Here’s what you should know about your state.

Florida by the numbers

- Change in housing units (2010–2020): 22,278 (+42.0% since 2010)
- Housing units (2020): 75,304
- Housing units (2010): 53,026

The population in Sumter County, Florida, grew rapidly over the last decade. Unlike other counties on this list, the growth in Sumter County has been skewed toward a much older demographic. A massive master-planned retirement community called The Villages has been a major draw for retirees, pushing the area’s population from about 93,000 residents in 2010 to about 130,000 in 2020. That development alone has contributed to the rapid growth of housing in this county over the last decade—and will likely continue to do so for the near future.

In other areas of the nation, rapid rates of housing growth have other catalysts, including urban sprawl and economic growth. And, in rare cases, growth can even be caused by an unprecedented influx of retirees relocating to the area. The only consistent factor across these counties is that the subsequent housing growth has had a big impact on the housing market.

Keep reading to see which counties have been at the top of the housing market boom over the last decade.

Counties that have seen the biggest growth in housing over the last decade

#1. McKenzie County, North Dakota: 4,571 housing units added 2010-2020 (+147.9% since 2010)
#2. Williams County, North Dakota: 9,763 housing units added 2010-2020 (+93.3% since 2010)
#3. Hays County, Texas: 34,117 housing units added 2010-2020 (+57.4% since 2010)
#4. Dallas County, Iowa: 13,865 housing units added 2010-2020 (+50.9% since 2010)
#5. Comal County, Texas: 22,831 housing units added 2010-2020 (+48.5% since 2010)