The John Sevier Highway House was built in 1790.
Location: 1319 W. Governor John Sevier Highway, Knoxville
This date comes from the Knox County GIS website. It features a list of "Historic Sites of Knox County, TN."
I haven't had a chance yet to go out and photograph this house. However, Knox Heritage has a good picture of it in its Picasa web album of antebellum homes. Click here to see it.