London Fire Brigade said: "Firefighters are currently dealing with a fire at a garage in Limpsfield Road, South Croydon. Six fire engines and 35 firefighters and officers from Addington, Purley and Croydon fire stations are at the scene.
"Half of the workshop is alight. One man has been has been treated for smoke inhalation by Surrey Ambulance Service. The Brigade was called at 1117. The cause of the fire is not known at this stage."