The paving of the route between Coal Grove and Proctorville was completed by 1955. On December 11, 2006, SR 243 was truncated to its present location following completion of the new SR 775 by-pass of Proctorville, which SR 7 was re-routed onto, leaving jurisdiction of the former routings of SR 7 and SR 243 through Proctorville to be turned over from the state to the local jurisdictions.
The paving of the route between Coal Grove and Proctorville was finished by 1955. On December 11, 2006, SR 243 was shortened to its present location after the completion of the new SR 775 bypass of Proctorville, which SR 7 was rerouted onto, leaving jurisdiction of the former routings of SR 7 and SR 243 through Proctorville to be transferred from the state to local jurisdictions.