Six crews tackled the blaze which broke out just after 0530 at Hendys on the Marsh Barton Industrial Estate.
It took just over 2 hours to get the fire under control.
Thirty per cent of the building has been damaged by the fire.
Police investigate car supermarket fire in Exeter
More from Local News
-
Exeter City manager Gary Caldwell leaves club
He joins fellow League One side Wigan Athletic
-
Man charged following Exeter voyeurism reports
Benjamin Fu, 23 to appear at Exeter Magistrates’
-
Man wanted following stalking report
Have you seen Thomas Smith?
-
New SEND school on the cards for Plymouth
Parents are asking for more specialist provision
-
Man on a mission to bring Plymouth alive at night
Lack of things to do after 7pm
-
Frustrating goalless draw for the Grecians
City held to back-to-back goalless draws
