How much a Locksmith service costs in Perth depends on the type of service you want. There are many other factors like time of the day and what day of the week it is. An after-hours service might cost you more and will help you out promptly during an emergency. While hiring service in the morning, which takes about an hour to get the job done, you're looking at a cost somewhere around $150- $220. At the same time, the same work will cost you about $250 - $330 if you call a mobile locksmith in the middle of the night. Please note that these are just estimates provided to give you a rough idea of what to expect and not accurate costs. If the job is extensive or complex, the price will be higher as it will require more time, effort and skill to get done.