Two appliances and crews from Aylesbury, one from Thame, one from Bicester, one from Buckingham, along with three officers attended.
A fire was located within a single story outbuilding, measuring approximately five metres by fives metres.
The firefighters used four sets of breathing apparatus, two hose reel jets, small gear and a thermal imaging camera.
A man and child were passed into the care of South Central Ambulance Service.