A chimney liner costs $1,500 to $4,000 installed in 2026 for the stainless steel liner most homes get, and the average job lands near $2,500. Clay tile and cast-in-place liners run $2,000 to $7,000 because the labor is heavier. The flue’s height, its diameter, and whether an old liner has to come out first decide where you fall in those ranges.
- Stainless steel liner, installed: $900 to $3,800, most jobs near $2,500
- Clay or cast-in-place replacement: $2,000 to $7,000
- DIY stainless kit: $300 to $800, materials only
- Add-ons that surprise people: old liner removal, a pre-install sweep, and the inspection
What is the average cost to install a chimney liner?
About $2,500, and for once the big cost guides mostly agree. We pulled all three on July 10, 2026:
| Source (2026 guide) | Average | Typical range |
|---|---|---|
| Angi (updated July 2026) | $2,500 | $1,500 to $5,000 |
| HomeGuide (February 2026) | $1,500 to $4,000 | $900 to $3,800 stainless |
| Fixr | $2,500 | $1,800 to $4,000 |
The floor is around $625 for a short aluminum liner on a gas appliance, and the ceiling is about $7,000 for a tall masonry chimney getting a cast-in-place liner, per Angi and HomeGuide. Most relines with flexible stainless steel sit between $1,500 and $3,500.
Price by liner material
| Material | 2026 installed cost | Lifespan |
|---|---|---|
| Aluminum (gas appliances only) | $625 to $2,250 | 5 to 15 years |
| Stainless steel | $900 to $3,800 | 15 to 25 years |
| Ceramic coating (Thermocrete) | $1,000 to $5,000 | Up to 50 years |
| Clay / terracotta | $2,000 to $3,500 | Around 50 years |
| Cast-in-place | $2,000 to $7,000 | 50 years or more |
Stainless steel wins most jobs for a reason. It works with wood, gas, and pellet appliances, it snakes past offsets in one flexible piece, and the install takes 4 to 8 hours instead of days. Clay lasts decades but retrofitting it means opening chimney walls, which is why the cheap material carries the expensive invoice.
What makes a chimney liner cost more?
Six things move the bill:
- Removing the old liner. Pulling a dead steel liner adds $250 to $800. Breaking out old clay tiles adds $500 to $2,500, per HomeGuide.
- Flue height and diameter. Liner is priced by the foot, $20 to $90 for flexible stainless, so a two-story chimney simply buys more of it. Odd diameters cost extra.
- Insulation. Insulating the liner improves draft and cuts condensation, and pros push it hard for wood stoves. It adds material and labor.
- Single vs double wall. Single-wall stainless runs $35 to $70 per foot installed, double-wall $50 to $160. Double is smoother inside and easier to keep clean.
- The sweep and the inspection first. The flue gets cleaned (about $255) and inspected (about $450, per Angi) before a liner goes in. Some quotes include this, many do not.
- Roof height and pitch. Steep or tall means slower, more careful work, and the labor line shows it.
Is a chimney liner really necessary?
For anything burning wood, yes. Fire codes, including NFPA 211, require solid-fuel chimneys to be lined, and plenty of pre-1940s masonry chimneys were built with no liner at all. An unlined or cracked flue lets heat and carbon monoxide reach the parts of your house that should never see either.
The main exception: gas and electric fireplace inserts often do not need a full reline. Many gas inserts vent through a smaller co-linear liner run inside the old flue, and electric units vent nothing. If an installer says your setup needs no new liner, that can be legitimate. Ask them to show you why.
What size chimney liner do I need?
The size that matches your appliance’s flue collar, which is why sizing is the installer’s job, not a guess. Most residential flues run 6 to 8 inches in diameter, and a modern wood stove usually wants an insulated 6 inch liner. Oversizing is not a safe margin: a flue that is too big cools the smoke, kills the draft, and builds creosote faster.
Can you install a chimney liner yourself?
A handy homeowner with a straight flue and a helper can, and the kit costs $300 to $800 instead of $2,500. Flexible stainless liners are sold as complete DIY kits, and feeding one down a straight chimney is more grunt work than skill.
Here is who should not: anyone whose flue has offsets, anyone who has not had the chimney inspected first, and anyone not comfortable working at the top of a two-story roof, which is where the job actually happens. Sizing mistakes and a botched appliance connection are the failure points, and both fail invisibly. If you DIY the liner, still pay for the inspection afterward.
How long does a chimney liner last?
15 to 20 years for the stainless steel liner most homes have, per HomeGuide’s 2026 guide, and quality double-wall liners reach 25. Clay and cast-in-place liners last 50 years or more. Aluminum is the short-timer at 5 to 15 years, which is part of why it only belongs on gas appliances.
A liner usually announces its death at the annual inspection: flaking metal, gaps at joints, or tile cracks on the camera. That yearly look is what turns a $2,500 planned reline into something you schedule, instead of something you discover after a chimney fire.
How we checked these prices
FireplaceIQ does not sell liners or installs, so the number does not change based on what we would like you to spend. These figures come from the published cost guides at Angi (updated July 8, 2026), HomeGuide (February 2026), and Fixr, all pulled on July 10, 2026. The three land unusually close together on this one, which does not happen often. We recheck every figure in September before the heating season.
Liners are one line in the chimney budget. The Chimney and Venting hub covers the rest of the system, our guide to chimney sweep costs covers the cleaning that comes first, and the Fireplace Costs hub collects every price guide on the site. The chimney repair cost guide, for the crown, flashing, and brick problems inspections turn up, publishes July 29.
Free: the Fireplace Winter Prep Checklist
One printable page. Every check for wood, gas, and electric, with 2026 prices, so nothing surprises you in November. We send the PDF and the occasional heating-season price update. No spam, unsubscribe anytime.
Chimney liner cost FAQ
How long does chimney liner installation take?
4 to 8 hours for a flexible stainless steel liner, per HomeGuide’s 2026 guide. Cast-in-place and clay tile work runs longer because it is closer to masonry construction than to pipe fitting.
Does a gas fireplace need a chimney liner?
Usually yes, but a lighter one. Many gas inserts vent through a small co-linear liner inside the old flue, and aluminum liners are allowed for gas because the exhaust is cooler. Wood-rated stainless works too and lasts longer.
What is the cheapest chimney liner?
Aluminum, at $625 to $2,250 installed in 2026. The catch is it only suits gas appliances and lasts 5 to 15 years. For wood, the cheapest legitimate option is single-wall flexible stainless.
Do you have to remove the old liner before installing a new one?
Not always. Old clay tiles in decent shape can often stay, with the new stainless liner run inside them. When removal is required, budget $250 to $800 for steel or $500 to $2,500 for clay tile.
Is a double-wall liner worth the extra cost?
For a wood stove or a fireplace you use hard, usually yes. Double-wall runs $50 to $160 per foot installed against $35 to $70 for single-wall, and it is smoother inside, easier to clean, and more durable. For a lightly used gas flue, single-wall does the job.