Hope the original build included the duct into the garage.
Built sons new garage couple of years ago , put a double socket on each of the three walls, and 4 bulkhead lights in ceiling,works a treat now. All run through its own distribution unit
We got a proper spark into do it , he even had to send copies of Certs to local council, that was the but we could not do ourselves ,his charge was not much more than could get the materials for.
His Lidl charger is connected up to his Land Rover---ser 1 86" over 50 years old and runs a treat, small heater on as he has 4 bikes stored as well.