Two fire engines from Preston and Bamber Bridge were called to a barn fire in Balderstone in the Ribble Valley.
Firefighters used four breathing apparatus, two hose reels and one jet to extinguish the fire in the 30m x 20m building.
The fire is thought to have been started suspiciously.
There were no reported injuries to animals or people.
The blaze on Woods Brow happened at around 9.30pm yesterday.