LISTED farm buildings were set alight in the early hours of yesterday.
Firefighters were called to the farmhouse and barn, in Primrose Lane, Liversedge, at 1.45am, and were still damping down at the scene almost 12 hours later.
Watch manager John Jackson said five fire engines rushed to the scene to battle the blaze.
He said: “When we arrived the main building was well alight.
“Nobody lives there – it has been empty since January and the owners live in Lancashire.”
Mr Jackson said the firefighters had managed to save the barn, which he said was a listed building.
He said fire investigation teams were looking into the cause.
Peter Ward, who lives near the farm, said: “ I didn’t see any flames. I expected it to be a car fire because it’s a favourite spot for burning out cars.
“There was just a lot of racket from the fire engines trying to get down the lane. It looks really bad.”