As of , there are 88 properties listed for sale in the city of Cassopolis and 88 properties listed for sale in the ZIP code 49031. Those 88 Cassopolis properties include 87 single family homes and 1 condos. This single family residential home located at 18936 Williamsville St in 49031 was last listed for $120,500. This is 72% below the median of $428,400 for that ZIP code and 72% below the current median price of $428,400 for Cassopolis. 18936 Williamsville St is roughly — square feet, which is 100% below the Cassopolis median of 1,723 and 100% below the 49031 ZIP code median of 1,723. This property's price per square foot was —, which is 100% below the current median price in 49031 of $236 and 100% below the Cassopolis median of $236 per Sqft.