The short answer
Installing a chimney liner in the UK — typically a flexible stainless-steel flue liner for a wood burner or stove — commonly costs in the high hundreds to low thousands of pounds fitted, depending on the flue. The liner itself is a moderate materials cost that rises with the length and grade (316 vs 904 stainless), and the rest is labour and access: the liner is dropped down the chimney, connected to the appliance, and the stack is usually accessed from the roof. Drivers include chimney height, liner grade, whether the work includes a new register plate, pot, cowl and insulation, and your region. The job should be done by a competent installer and notified under building regulations.
A flue liner gives a wood burner or stove a safe, correctly sized flue inside an old chimney. Cost depends on length, the steel grade, and the access to fit it.
At a glance
- Liner installedhigh hundreds to low thousands
- Grade choice316 (cheaper) vs 904 (longer life)
- Cost driversflue length, height, extras
- Sign-offbuilding regs / HETAS notify
- Often includedregister plate, pot, cowl
What a chimney liner costs to install
Most modern liner work is a flexible stainless-steel flue liner fitted when a wood burner or multifuel stove is installed in an old chimney, giving a correctly sized, gas-tight flue. The installed cost combines the liner material, the labour to drop and connect it, the access to the stack, and usually some extras such as a register plate, new pot, cowl and insulation around the liner. The ranges below are indicative guidance from established UK cost guides, not fixed quotes, because flue length and chimney height vary a lot. A liner is not always legally required, but it is very commonly fitted to make an old flue safe and efficient for a stove.
| Element | Typical UK range | Notes |
|---|---|---|
| Flexible liner (material) | moderate, by length | longer flue = more liner |
| 316 grade stainless | lower cost | suits seasoned wood / smokeless |
| 904 grade stainless | higher cost | longer life, harder fuels |
| Installation + access | added labour | roof access, connection |
| Liner job, typical total | high hundreds to low thousands | with register plate, pot, cowl |
Indicative ranges for guidance only. Sources: Checkatrade and MyJobQuote chimney liner cost guides.
Liner grade: 316 vs 904 stainless
Flexible liners come in two common stainless grades, and the choice affects both cost and lifespan. 316 grade is the cheaper option and is generally suited to burning well-seasoned wood or smokeless fuel on an intermittent basis. 904 grade costs more but is more corrosion-resistant, making it the safer choice for heavier use, harder fuels, or where the chimney runs cooler and condensation is more likely. Choosing too cheap a grade for the way you actually burn can shorten the liner's life and may affect its warranty. A good installer will recommend the grade based on your fuel, appliance and how often you will use the stove, rather than simply quoting the lowest price. It is worth asking which grade is in the quote and why, because two prices for a "liner" may be specifying very different products.
Building regulations and competent installation
Fitting a stove and liner is notifiable work under the Building Regulations (Part J, which covers combustion appliances and flues). It must either be done by a competent-person scheme installer — most commonly registered with HETAS — who can self-certify the work, or be notified to and inspected by your local authority's building control. On completion you should receive a certificate confirming the installation complies, which matters for safety, insurance and any future sale. A correctly installed liner with the right register plate, sealed connections and a suitable cowl ensures the flue draws properly and that combustion gases, including carbon monoxide, are taken safely outside. A carbon monoxide alarm is also required in the room. Because this is safety-critical work, it is not a job to give to an uncertified general builder; check the installer's HETAS (or equivalent) registration before agreeing.
What changes the installed price
Several factors decide where a liner job sits in the range. Flue length and chimney height set how much liner is needed and how much access work is involved — a tall Victorian stack uses more liner and more scaffolding or roof access than a short modern flue. Liner grade (316 vs 904) shifts the materials cost. Extras matter: a register plate, new pot, cowl, back-filled insulation around the liner, and any repointing or crown repair found necessary while up there all add to the total. Access difficulty — steep roofs, terraced stacks — affects labour. And region moves rates as ever. When comparing quotes, confirm each states the liner grade and length, lists the extras, confirms HETAS/building-regs notification is included, and states whether VAT is in the figure. A quote that is much cheaper may be using a lower grade, omitting the certificate, or excluding access.
It also pays to understand why liner quotes vary beyond the headline metre rate. A straightforward flexible stainless liner dropped down a clear, straight flue is quicker and cheaper than one fought down a bended or obstructed chimney, which may need extra time or even minor opening-up. The grade of steel matters too: 316-grade liners suit seasoned wood and smokeless fuels, while the more corrosion-resistant 904-grade is recommended for heavier or unseasoned use and usually costs more but lasts longer. A proper installation should also include the right top and bottom fittings, a cowl, and back-filling insulation where specified, plus the all-important sweeping and commissioning. Because liner work on a solid-fuel appliance is notifiable under Building Regulations Part J, using a HETAS-registered installer who can self-certify avoids a separate building-control charge — a real saving as well as a compliance point.
Frequently asked questions
Do I need a liner to fit a wood burner?
Not in every case, but a flexible flue liner is very commonly fitted because it gives the stove a correctly sized, gas-tight flue inside an old chimney. An installer will assess the existing flue; many old chimneys are too large or leaky to work safely without a liner.
What is the difference between 316 and 904 grade liners?
Both are stainless steel. 316 is cheaper and suits seasoned wood or intermittent use, while 904 is more corrosion-resistant, costs more, and is the safer choice for heavy use or harder fuels. Fitting the wrong grade can shorten the liner's life.
Does a chimney liner need building regulations sign-off?
Yes. Fitting a stove and liner is notifiable under Part J of the Building Regulations. It must be done by a competent-person installer (commonly HETAS-registered) who self-certifies, or notified to local authority building control, and you should receive a completion certificate.
Sources & further reading
- Checkatrade — chimney liner cost guide
- MyJobQuote — chimney liner cost guide
- HETAS — wood burning stove and flue guidance
Figures on this page are typical UK ranges drawn from published sources and depend on your specific chimney. They are guidance, not a quotation.