It happened around 11:00 pm Saturday evening on the 200 block of Scarlett Road.
Fire crews were called to Phillips Mushroom Company where they were met with a large fire in a warehouse used to store mushrooms.
At least six companies from Chester and New Castle counties were brought in to assist with the blaze.
Firefighters were able to get the upper hand on the fire in about an hour.
No injuries were reported. The cause of the fire remains under investigation.