O’Fallon housing market cools as new construction surges

Builders broke ground on more than 600 new homes across O'Fallon last quarter, even as buyer demand softened against the highest mortgage rates the region has seen in nearly two decades.

The construction surge — concentrated in the city's western and southern growth corridors — reflects long-running pipeline commitments rather than fresh demand, local builders said. Several large developments were planned and permitted before rates began climbing late last year.

Real estate agents working the O'Fallon market reported a noticeable cooling in showings and a lengthening of average days-on-market for existing homes, particularly in the upper price tiers above $550,000.

Buyers who remain active are increasingly negotiating rate buy-downs and closing-cost concessions, agents said, with builders offering some of the most aggressive incentives seen in years to keep new inventory moving.

Despite the slowdown, O'Fallon remains one of the fastest-growing communities in the St. Louis metro, and city planners say they expect another wave of permit applications once interest rates stabilize.