As of , there are 217 properties listed for sale in the city of Alton and 217 properties listed for sale in the ZIP code 62002. Those 217 Alton properties include 215 single family homes and 2 condos. This single family residential home located at 198 Sering Ave in 62002 was last listed for $35,000. This is 56% below the median of $79,900 for that ZIP code and 56% below the current median price of $79,900 for Alton. 198 Sering Ave is roughly 644 square feet, which is 50% below the Alton median of 1,299 and 50% below the 62002 ZIP code median of 1,299. This property's price per square foot was $54, which is 18% below the current median price in 62002 of $66 and 18% below the Alton median of $66 per square foot.