Two appliances and crews from West Ashland, one from Newport Pagnell, along with an officer attended.
There was a smell of burning in a commercial building on arrival, the building was evacuated.
The fire was located within an insulation board.
The firefighters used one hose reel jet, a short extension ladder, small gear and a thermal imaging camera.
They provided advice to the people on site and also reinspected the scene later in the evening to check for hotspots.