About 5.45am on Sunday, the Department of Fire and Emergency Services (DFES) notified police of a fire at a vehicle wholesaler located on Colin Jamieson Drive.
It will be alleged the accused using Molotov cocktails, started a fire which destroyed 19 vehicles.
DFES were able to limit the fire to the front of the premises.
The estimated cost of the damage to the vehicles is $180,000 and $500,000 damage to the premises.
The 39-year-old man from Thornlie was charged with 'Criminal Damage by Fire' and is due to appear before the Perth Magistrates Court on 17 April 2026.
Members of the public play a vital and significant role in assisting investigators by providing timely information relating to suspicious activity in a fire area.
Arson Squad officers urge anyone with information relating to a fire, to contact Crime Stoppers online at www.crimestopperswa.com.au or by calling 1800 333 000.
