About 10.25pm, police and fire and emergency services were called to the warehouse on Pilbara Street.
The fire caused extensive structural damage to the building.
Detectives would like to speak to the man pictured who they believe can help them with their investigation.
Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWThe man is described as being aged between 20 and 35, with a tanned complexion, about 180cm tall and having a slim build.
He was wearing black pants, a light-coloured long-sleeve shirt, black boots and a black baseball cap with a white motif.
Rewards of up to $50,000 are available for information that leads to the identification and conviction of an arsonist.
MORE: Pharmacy giant Sigma Healthcare to build $60m centre in Perth
MORE: Ellenbrook parents join drive to raise funds for Lifeline WA after loss of own son