Based on SMART MLS data through 2025, the average single-family home in Darien sold for $2,831,501, up 9.6% from $2,582,563 the year before. Median sale price over the trailing three months sits around $2.8 million. These figures reflect actual closed transactions, not automated estimates. Zillow’s Home Value Index for Darien currently shows $1,851,266, which is nearly $1 million below what buyers are actually paying. If you want an accurate picture of what your specific home is worth, a Comparative Market Analysis drawn from real local Fairfield County sales is the only reliable starting point.