It varies, but it typically costs between $1,000 and $5,000 to replace a prefab fireplace. Labor costs can account for up to half of that total cost, so it's important to hire a qualified contractor to do the work.There are a few factors that will affect the cost of replacing a prefab fireplace. The size and complexity of the job will be one factor, as will the type of replacement fireplace that is chosen. So it's difficult to give an exact estimate without knowing more about the specific project.However, in general, expect to pay at least $1,000 for a basic replacement job, and up to $5,000 or more for a more complex project.

It typically costs between $2,000 and $4,000 to replace a prefab fireplace. However, this can vary depending on the size and complexity of the job.