Four fire engines from Preston, Penwortham and Bamber Bridge rushed to the scene in Church Street at around 6.40am today (August 24).
A "quantity of waste" had caught alight before spreading to an adjacent four-storey building approximately 40x60m in size, the fire service said.
Firefighters used two breathing apparatus, one hose reel, breaking-in tools, a partner saw, and Milwaukee tools to extinguish the flames.
No injuries were reported.
Crews remained in attendance for around two and a half hours.
Thanks for reading. If you value what we do and are able to support us, a digital subscription is just £1 per month for the first two months. Try us today by clicking HERE.