One fire appliance from Taunton and two from Wellington were sent to a report of smoke coming from Scope on Bridge Street in Taunton at 00:54 (Sunday).
On arrival the crews requested further support as smoke was seen issuing from the front and back of the building. Crews from Bridgwater and Wiveliscombe were then sent on.
The fire was within a store room and crews used 4 breathing apparatus and 2 hose reel jets to deal with the incident.
The fire was extinguished using 4 breathing apparatus, 2 hose reel jets, a thermal image camera and positive pressure ventilation.
The cause of the fire is under investigation.