It can cost anywhere from $500 to $1,500 to rebuild a firebox, depending on the type of material used and the size of the firebox. Typically, a masonry fireplace with a brick or stone chimney will cost more than a metal fireplace with a metal chimney. The cost of materials and labor can also vary depending on the location. For example, labor costs in New York City are typically higher than in rural areas.

It depends on the contractor and the region. Typically, it costs between $2,000 and $10,000 to rebuild a firebox. Some factors that can affect the cost of rebuilding a firebox include the size of the firebox, the type of material used for the rebuild, and whether or not any additional work needs to be done (like repairing or replacing damaged brick or mortar).