Multiple fire crews were called to a detached barn fire in Little Brickhill last night, which generated multiple calls to Thames Valley Fire Control Service.
Units from West Ashland, Broughton and Bedfordshire were called to the blaze, containing timber and tools.
Support was also provided by neighbouring fire and rescue services, including Oxfordshire Fire and Rescue Service and Bedfordshire Fire and Rescue Service. At the height of the incident, 14 appliances were in attendance.
The building has been severely affected, with approximately 80% damaged by fire.
One male casualty, suffering from smoke inhalation, was treated at the scene and is now in the care of the South Central Ambulance Service.
Residents are being advised to keep doors and windows closed.
Crews will remain on scene for some time as they continue firefighting operations and work to bring the incident to a close.