Ever wondered just how old a local building really is? A look at parcel records from St. Louis City, St. Louis County and St. Charles County gives us an approximate picture. Take a look at the map below to see how old parts of St. Louis are.

Editor's note: This map was published in 2014, but significant technology changes since then caused it to stop working. In September 2021, the Post-Dispatch published a new version of this building age map.

Walker Moskop is a data specialist and reporter for the St. Louis Post-Dispatch.