The blaze broke out in the Nissan showroom on London Road (Credit pic: Google Streetmaps)
The Brigade were called at 7.56pm to the incident on London Road.
Four fire engines and around 25 firefighters from Dagenham, Wennington and Ilford stations attended the scene.
The fire was under control by 9.10pm.
There were no reports of any injuries.
Part of the workshop was damaged. One motor vehicle was also destroyed by the fire and another was damaged.
The cause of the fire is under investigation.
Tags: Romford, Havering