At 8.59pm on Sunday (31) one crew from St Neots was called to a fire on Station Road in Tilbrook.
Firefighters arrived to find a fire in a chimney and extinguished it. They returned to their station by 11.15pm.
The cause of the fire was accidental.
A fire service spokesman said: “Please ensure that you get your chimney swept and brickwork inspected at least once a year. This will help to prevent a chimney fire.”