Chimney Rebuild Cost. Chimney rebuilding costs are higher than chimney repair costs; however, sometimes chimneys are so badly damaged that repairing them is not feasible. The cost of rebuilding a chimney ranges from $2000-$5000. Chimney rebuildng costs vary depending on the size of chimney and what material is used in its reconstruction. It may cost you $200 to $500 for materials and tools to repair your fireplace and chimney. A mason or contractor will charge you $1,000 to $1,500 for a chimney repair project. Finally, foundations and siding are perhaps the most expensive and scariest of repair projects.