Chimney Repair Cost Calculator

The twentyfold gap, and why this page has one axis

HomeAdvisor runs two chimney cost pages, both updated 20 June 2026. On repair they essentially agree with each other — the repair page gives a $455 average and the replacement page, cross-referencing, says around $460. That gap is trivial. The gap worth an entire calculator sits between the two normal ranges: $160–$750 for a repair against $3,100–$15,400 for a rebuild, on a $9,300 average.

So the scope tier is the single axis on this page. It is not a blended average, not a square-footage input and not a location multiplier, because the thing a homeowner can actually identify from a contractor's description is the scope — and the scope is what decides which side of that gap the bill lands on. The repair page separately puts a complete replacement at about $10,000, which is another way of saying the same thing.

The seven scope tiers, sorted by scope rather than by price

Two tiers sit slightly out of monotonic price order below. That is a property of the published figures rather than an error: scope and price are correlated, not identical, and sorting by scope is what makes the ladder usable from a contractor's description.

The most useful tier for orientation is parging at $1,000–$2,000, because it sits squarely in the gap — above the top of the repair normal range and below the bottom of the rebuild normal range. If your quote lands there, you are being sold neither a patch nor a rebuild. And the single most valuable question before accepting a full teardown is why a partial rebuild above the roofline will not do: that tier is $1,500–$4,000, roughly a quarter of the full-rebuild band, and it is the right answer whenever the masonry below the roof line is sound.

The four lines that are invoiced separately

• Flue liner installation, $625–$7,000. An elevenfold band and the largest source of variance on this page. At the top of it a liner alone costs more than a partial rebuild's floor. Do not confuse it with the limited-flue-tile tier at $200–$400 — patching a few cracked tiles and relining the whole flue are different jobs. If a quote says “the flue” without saying which, ask.
• Chimney cap replacement, $300–$300. Published as one number rather than a band, so it is carried as both ends here rather than a spread being invented around it.
• Crown repair, $150–$350. This is repair, not replacement. The publisher prices replacement separately as “up to $3,000” — a ceiling with no published floor, which this page shows and refuses to add to anything, because summing a ceiling means inventing a floor.
• Chimney cleaning, $130–$380. A sweep is a cleaning, not an inspection, and it is labelled as one here. It is also the cheapest line on this page with a direct line to the fire statistics below.

None of these is ticked by default, because the headline band on this page describes the scope-tier ladder and a default that quietly adds extras would render a number the title does not describe. Tick them on a rebuild tier and the calculator will tell you which ones that tier probably already includes rather than silently summing a padded figure.

What this calculator refuses to do

• It does not multiply a per-linear-foot rate by your chimney height. Those rates are real and published — brick $60–$200, stone $80–$250, metal $40–$120 per linear foot — and they are shown on the results as a comparison table. They are not multiplied, because the same publisher prices the same work as a whole job, and answering one question two different ways is worse than answering it once. The per-foot answer would also look more precise while ignoring flue count, access, staging, demolition and the roof penetration.
• It does not apply a per-square-foot rate. The repair page publishes chimney flue repair at $65–$100 and repointing brick (new mortar joints) at $4–$25 per square foot. Neither is multiplied, because nobody can estimate the interior square footage of a flue from the ground, and a confident number from a guessed denominator is worse than no number.
• It attaches no dollar figure to an NFPA 211 inspection level. NFPA 211 is the governing standard and this page names it. Every description of the three levels and every price attached to them located on 11 September 2026 sat on a chimney sweep company's own marketing page — a vendor pricing its own service — and this site does not accept that as a sole source. The level is an advisory input: it changes what the results say and no figure they print.
• It applies no regional multiplier. Neither publisher attaches a number to location, so neither does this page.
• It never puts an average or a normal range inside a sum. The $455 repair average, the $9,300 rebuild average, the $10,000 complete-replacement figure and the $3,000 crown ceiling are all display-only cross-checks that tell you which population your total is in.

Material steers the ladder; it does not price it

The repair page does publish whole-job bands by material, and they are below. They are not used as tiers for one reason: brick at $300–$15,000 is a fiftyfold band that spans this page's entire headline on its own. A tier that wide answers no question.

What material does change is which tiers apply at all. A metal or factory-built flue has no mortar to repoint and no clay liner to patch. A framed chase over a prefabricated fireplace is a clad box rather than a chimney, and its expensive failure is widespread wood rot at $2,500–$4,000 — published as a repair, and more than any other repair tier here. Where the tiers on this page are the masonry figures applied to stone, the results say so rather than hiding the substitution.

Why this is worth doing before winter

The U.S. Fire Administration's topical report on residential building heating fires counts 34,200 such fires a year, with 165 deaths and 600 injuries. 77 percent of residential building heating fires were confined fires — fires confined to chimneys, flues or fuel burners. That is the single most relevant statistic on this page: the majority of heating fires happen inside exactly the component a chimney repair addresses. Heating is the second leading cause of all residential building fires, after cooking. Incidence peaks in January at 20 percent of the annual total, and among nonconfined heating fires the heat source was too close to combustibles in 27 percent — a clearance and installation failure rather than a masonry one.

That agency publishes no repair costs, and its one dollar figure is not one. The U.S. Fire Administration publishes no chimney repair costs, and the one dollar figure in this report is not one. Its $367 million is AGGREGATE NATIONAL PROPERTY LOSS across all 34,200 fires in a year. It is not the cost of a repair, not the cost of a fire, and not divisible into either — it is never summed, divided or scaled anywhere on this page. USFA supplies the reason to act; the cost publishers supply every dollar. The fire statistics are on this page as the reason to act, and every dollar on it comes from the cost publishers.

Related calculators

A chimney is a hole through the roof, which is why chimney findings and roof findings arrive together. The roof repair cost calculator prices the flashing-and-shingle side of the same leak this page's cheapest tier addresses — worth pricing together, because a mason and a roofer will each tell you the other trade owns the detail. Where the roof itself is at the end of its life, the roof replacement cost calculator prices that, and the sequencing matters: a chimney rebuild above the roofline is cheaper done while the roof is open than after new shingles are down.

Chimney defects are also a standard inspection finding rather than something most owners go looking for, so the home inspection cost calculator prices where this number usually starts. If the reason the chimney is wet is that the whole masonry envelope is taking water, the sump pump & French drain cost calculator prices the drainage half of that problem.