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The cost to replace a chimney is about $10,000 on average and can cost up to $15,000, depending on the size, accessibility, materials, and extent of the replacement. Sometimes tearing the chimney down to the roof line and rebuilding it is an option. But if the chimney's internal structure deteriorates badly enough, a complete demolition down to the fireplace or the foundation may be necessary.

A chimney cap costs about $300 on average to install, with prices ranging from $75 to $1,000. The final cost depends on several factors, including the professional you hire, the accessibility of your chimney, the cap's material and size, whether any repairs are needed, and if it requires custom fabrication. Chimney caps are usually made from galvanized steel, stainless steel, or copper. Copper caps are the most expensive, followed by stainless steel and then galvanized steel. Excluding labor, average material costs are around $100 for galvanized steel, $250 for stainless steel, and $600 for copper. You may also face additional costs, such as hiring a chimney sweep to clean the chimney before the cap is installed.

You should get your chimney cleaned around once per year, but you might want to opt for bi-annual cleanings if you use your fireplace often. Remember, your boiler likely vents into your chimney as well, so cleaning is required even if you don’t use your fireplace. It’s a good idea to clean your chimney during the summer so that it’s ready to use when you want a worry-free cozy fire on that first crisp autumn night of the season.

Common issues discovered during a chimney inspection or cleaning include creosote buildup, cracked liners, structural degeneration or masonry degradation, and obstructions such as blocked flues or animal nests. These issues are potential safety hazards that can lead to combustion problems or poor air quality if not addressed.