Over the past year, typical home values in O'Fallon have dipped about 5.5 percent, while values in St. Clair County as a whole are down around 2.5 percent. Homes are also taking longer to sell year over year, with median days on market up roughly 63 percent. At the same time, inventory has grown nearly 23 percent compared to last year.
In March 2026, the typical home value in O'Fallon was about $320,000, with a median list price close to $349,750. Homes spent a median of 44 days on the market, and roughly 33 percent of sales closed above list price, even as about 13 percent of listings saw a price drop.
Recent monthly shifts point to a cooling but still active environment, with typical values down about 9.1 percent month over month and median list prices down about 9.2 percent, while inventory climbed nearly 16 percent and new listings surged almost 36 percent. Looking to April 2026, typical values are projected around $304,000 with a median list price near $332,125 and inventory edging up to about 109 homes, so both buyers and sellers can benefit from having Agent Pronto connect them with an experienced local agent to navigate these trends.
