New Chimney Construction Cost Calculator
A new chimney is labor-heavy masonry priced roughly by height — footing to cap. Enter materials, the mason’s labor and roof access; the taller it climbs, the more of all three.
1 Enter your numbers
Building a new chimney is labor-heavy masonry priced roughly by height — about $7,700 here. A factory-built metal chimney is cheaper and faster than full masonry; height, footings and code drive it, so it’s a licensed mason’s estimate.
Building a chimney from scratch is the big-ticket item in this whole pillar, because it is real structural masonry: a footing in the ground, courses of block and brick all the way up, a flue tile or liner inside, a smoke chamber, and a crown and cap on top. It is priced roughly by height — every additional foot is more material, more crew-time and more staging — and above a story or two the labor and access climb faster than the material.
There is a cheaper fork worth knowing: a factory-built (class-A) metal chimney in a framed chase looks like masonry from the curb but goes up far faster and for less, which is why most new fireplaces use one. Full site-built masonry is the choice when you want a true masonry hearth or have to match an existing house. Either way it is a permitted job with a footing and a code-listed flue — a licensed mason’s estimate, not a weekend project. Use this to sanity-check the bid, and the 3-2-10 height tool to confirm how tall it must legally stand.
Formula
total = (materials + labor + access) × (1 + contingency)
Three buckets, and on a new chimney labor is usually the largest by a wide margin — masonry is slow, skilled, weather-dependent work. materials covers block, brick, the flue tile or liner, crown mix and footing concrete. access is the scaffold, lift or staging the height demands. Because so much is buried in crew-days, carry a healthy contingency for weather delays and a footing that hits something unexpected.
Worked example
An 18-ft exterior masonry chimney for a new great-room fireplace. Materials — block, brick, clay flue tile, crown and footing — at $2,860, a mason crew at $4,720, and scaffold/staging for the height at $640. With a 10% buffer:
(2,860 + 4,720 + 640) × 1.10 = 8,220 × 1.10 = $9,042
Swap full masonry for a factory-built metal chimney in a framed chase and the same height comes in for a fraction of the labor — the trade-off is a metal flue in a wood chase versus a solid masonry stack.
Height, footing and the masonry-vs-metal fork
- Height sets the price. Material, crew-time and staging all scale with the run. And it is not your choice alone — the 3-2-10 rule sets the legal minimum top height, so a nearby ridge can force extra courses.
- Footing and structure. A masonry chimney needs its own footing; an exterior chase needs framing and flashing. What is under the footing (rock, a slab, fill) can swing the excavation cost.
- Masonry vs factory-built. Full masonry is dearer and slower but is a solid stack; a class-A metal chimney in a framed chase is cheaper and faster. Decide the type before comparing bids — they are not the same product.
- Permit and inspection. New construction is permitted and inspected; the flue must be listed and the clearances met.
Chimney construction and clearance standards live with NFPA; masonry practice with organizations like the Masonry Society.
Reference table
Labeled planning band — sanity check only, NOT a quote. A new chimney varies widely by height and type; confirm with a licensed mason.
| Job | Typical band |
|---|---|
| Chimney rebuild | $1,000 – $6,000 |
| Fireplace installation | $1,500 – $8,000 |
Frequently asked questions
How is a new chimney priced — by height?
Roughly, yes. It is structural masonry from a footing to the cap, so more height means more block, brick, flue tile, crew-days and staging. Above a story or two the labor and access lines rise faster than the material. This tool keeps the three buckets separate so you can see where a tall stack spends.
Is a masonry chimney or a metal one cheaper?
A factory-built (class-A) metal chimney in a framed chase is markedly cheaper and faster than full site-built masonry — which is why most new fireplaces use one. Masonry wins when you want a true masonry hearth or must match the house. Pick the type first; they are different products at different prices.
How tall does the new chimney have to be?
At least the NFPA 211 3-2-10 minimum: 3 ft above where it exits the roof and 2 ft above anything within 10 ft. A nearby ridge can force extra courses — and extra cost. Run the 3-2-10 tool before you price it, because height is the main cost driver.
Do I need a permit to build a chimney?
Almost always. New chimney construction is permitted and inspected, needs a proper footing, and must use a listed flue with the right clearances. It is a licensed mason’s job — budget the permit and the inspection, and use this estimate only to vet the bid.