Housing Market Risk Report 2026: Most Vulnerable US Counties Identified

A new 2026 housing risk analysis identifies specific US counties where home values are most vulnerable to a downturn, with affordability crises, high rates of underwater mortgages, and local economic pressures creating significant risks. Based on data from real estate analytics firm ATTOM, markets in California and Florida top the list, driven by the aftermath of natural disasters and soaring homeownership costs that far exceed local wages. This report provides a crucial barometer for homeowners and prospective buyers to assess local market stability.

What are the most at-risk housing markets in the US?

According to the 2026 second quarter report, the nation's riskiest housing market is Charlotte County, Florida, home to Punta Gorda. The analysis, which evaluated 579 counties, found a high concentration of vulnerable markets in specific states. Fourteen of the top 50 highest-risk counties are in California, followed by seven in Florida, five in New Jersey, and four in Louisiana. Risk was determined by evaluating home affordability relative to local incomes, the proportion of seriously underwater mortgages, foreclosure rates, and local unemployment figures.

Why is housing affordability a primary risk factor?

A primary driver of market risk is severe unaffordability. The data reveals that in 19% of the analyzed counties, homeowners would need to spend 50% or more of their annual income to cover the costs of a typical home. Traditionally, housing is considered "unaffordable" when it consumes over one-third of a household's income; by this measure, 63% of the counties analyzed are unaffordable. This affordability gap raises questions about how long record-high prices can be sustained, especially as rising mortgage rates price more buyers out of the market.

Table: Counties Where Housing Costs Exceed 100% of Annual Wages

How do underwater mortgages and foreclosures impact risk?

The health of a housing market is also gauged by the percentage of "seriously underwater" mortgages. A property is considered seriously underwater when the total loan balance is at least 25% higher than the home's current market value. Nationally, this figure is a low 2.7%. However, the risk is highly concentrated; Louisiana exhibits an unusually high number of underwater properties, with rates exceeding 10% in at least seven parishes. In fact, seven of the ten counties with the highest underwater rates are in Louisiana, led by Rapides Parish (17.3%) and Calcasieu Parish (16.9%). These areas, combined with higher foreclosure and unemployment rates, face amplified downward pressure on home values.

What role do natural disasters play in market volatility?

In certain high-risk states, environmental factors are a significant contributor to market instability. In California, several counties on the list have been severely impacted by wildfires in recent years. In Florida, the persistent risk of hurricanes has led to skyrocketing homeowners insurance premiums, adding thousands of dollars to annual ownership costs and dampening home values in major markets like Charlotte County. These external shocks introduce a layer of uncertainty that goes beyond traditional economic indicators.

Which markets are considered the safest?

The same report highlights counties with the lowest risk. Erie County, New York, home to Buffalo, is named the safest housing market in the nation. The least risky counties are characterized by much higher housing affordability. For example, in Chautauqua County, NY, housing costs require only 17.8% of the typical annual wage, and in Potter County, TX, that figure is 19.6%. These markets are not facing the same pressure from unaffordable prices or high rates of distressed properties.

For homeowners and buyers in high-risk areas, it is critical to understand that a high median sales price does not automatically equate to a healthy market. Factors like local employment, insurance costs, and the proportion of underwater homes are vital indicators of long-term stability. Prospective buyers should carefully evaluate the total cost of ownership, including taxes and insurance, and consider a market's broader economic fundamentals before making a purchase decision.