As of , there are 45 properties listed for sale in the city of Monticello and 45 properties listed for sale in the ZIP code 61856. Those 45 Monticello properties include 42 single family homes and 3 condos. This residential (general) (single) home located at 405 S Piatt St in 61856 was last listed for $175,833. This is 0.5% above the median of $174,900 for that ZIP code and 0.5% above the current median price of $174,900 for Monticello. 405 S Piatt St is roughly — square feet, which is 100% below the Monticello median of 1,902 and 100% below the 61856 ZIP code median of 1,902. This property's price per square foot was —, which is 100% below the current median price in 61856 of $108 and 100% below the Monticello median of $108 per square foot.