Huge fire at Chester Hill factory

Up to 80 firefighters from NSW Fire and Rescue battled a blaze at a factory complex in Chester Hill, amid concerns about asbestos.

Up to 80 firefighters from NSW Fire and Rescue battled a blaze at a factory complex in Chester Hill. (AAP)

Investigators are trying to determine what caused a major factory fire in Sydney's west overnight.

Up to 80 firefighters battled the Chester Hill blaze that destroyed a bathroom store and damaged a noodle factory.

No one was injured.

A NSW Fire and Rescue spokeswoman said part of the factory was constructed with fibro material and precautions were taken due to asbestos concerns.