Just before 5 p.m. Sunday afternoon, fire officials in Webb, Kinsey and Columbia responded to an explosion in Webb on Folmar Road.
Authorities say the home owner, his grandson, and nephew were working on a race car inside their workshop when they heard an explosion outside.
They noticed flames inside, shut off their electricity and called 911.
Officials were able to save the home, but the workshop was a total loss.
Officials are investigating the exact cause of the fire.
There were no injuries.