A MAN has been seriously injured in a car crash.

The crash happened at about 3.45pm today (Tuesday) when the car left the road outside Castle Point Council offices in Thundersley.

The car ended up in a garden off Kiln Road and the driver, a man in his mid 40s, is being treated by air ambulance in the field behind Seevic College.

It is not known if he was conscious when then car left the road.

Police have closed Kiln Road.