Collin County's housing market in 2026 shows a 62% surge in inventory above the long-term average, with over 4,300 listings, leading to a 6.1% year-over-year decline in average home values to $485,017. Median listing prices dropped nearly 5%, and median sale prices fell over 7%. Increased supply and higher mortgage rates have softened demand, causing longer market times and price reductions, especially in suburbs like Frisco, Plano, and Prosper.