As of today, , there are 36 properties listed for sale in ZIP code 48706 and 66 properties listed for sale in the city of Bay City. Of those 66 properties, there are 58 single family houses and 8 condos. The last known list price for 109 Keystone St was $60,000, which is 11% below the current median price of $67,500 for Bay City and 23% below the median of $77,950 for 48706. 109 Keystone St is a single family residential home that is approximately — square feet, which is 100% below the median size in Bay City of 1,360 square feet and 100% below the median size in 48706 of 1,349 Sqft. This property's price per square foot was —, which is 100% below the current median in 48706 of $54 and 100% below the Bay City median of $53.