Four fire engines and around 25 firefighters were called to vehicles alight in Averley Road, Upminster.
One tractor and an HGV flatbed recovery vehicle were destroyed by the fire and part of a digger was also damaged.
The Brigade was called at 0001 and the fire was under control at 0051. Fire crews from Hornchurch, Wennington and Dagenham fire stations attended the scene.
The cause of the fire is under investigation.