Fire has torn through a Brisbane boxing gym overnight and it took 10 fire crews more than an hour to bring the flames under control.

Emergency services were called to Fortitude Boxing on Kyabra Street in Newstead just after 12.30am on Tuesday and found the building "well alight" upon arrival, according to the fire service.

The remains of Fortitude Boxing in Newstead.

A total of 14 QFES units responded to the blaze, with 10 of those being firefighting units.

The majority of the fire was under control by 1.30am and fire crews were dampening down hotspots about 20 minutes later.