One fire engine and crew from Newport Pagnell, one from Broughton and one from West Ashland attended, along with an officer.
Smoke was issuing from a bungalow when they arrived.
Firefighters used two sets of breathing apparatus and one hose reel jet to tackle a fire in the roof space.
The gas and electricity supplies were isolated.
The roof space was around 20 per cent damaged by fire and 100 per cent damaged by smoke.