One appliance and crew from Newport Pagnell, one from Broughton, and two from West Ashland attended, along with an officer.
Smoke was issuing from the roof of a two-storey commercial building when they arrived.
The fire is believed to have started in a light fitting and spread to affect the roof joists.
The firefighters used:
- Two sets of breathing apparatus
- One hose reel jet
- One thermal imaging camera