Chimney Liner & Rebuild Cost - You See the Footage Before You Get a Price

Every visit starts with

Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed

Worth knowing

Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.

Styles & brands we work with

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Before & after – our own jobs

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How Much Does Chimney Liner & Rebuild Cost in Smithtown?

Chimney liner replacement in Smithtown, NY typically runs $2,400 to $6,800 depending on liner type, flue length, and the condition of the surrounding masonry. A partial chimney rebuild – repairing damaged sections above the roofline – generally falls between $1,800 and $4,500, while a full chimney rebuild from the firebox up can reach $8,000 to $18,000 or more for taller, multi-flue stacks. If you need both, explore our Chimney Liner & Rebuild services for a scoped solution. Most Smithtown homeowners who call us about a failing liner or crumbling crown end up somewhere in the $2,800 to $5,500 range once all the work is scoped.

If you want a firm number for your specific chimney, call (631) 814-2057 – we answer every call with a live person and offer free estimates with no obligation.

Chimney Liner & Rebuild Cost Breakdown (2026)

The table below reflects actual pricing in the Smithtown market – not national averages pulled from a spreadsheet. Long Island labor costs, local material freight, and the age of the housing stock in communities like Hauppauge, Kings Park, and Commack all influence where a job lands in these ranges. We document every scope with Level-2 camera inspection photos so you can see exactly what we’re pricing before a single tool comes off the truck.

What Drives These Numbers Up or Down

Flue height is the biggest single variable. A standard two-story Colonial in Smithtown might have a 25-foot flue; an older Victorian near Landing Avenue with a steep roofline and a taller stack could run 35 feet or more, and that extra liner material and labor time adds up. We price per linear foot of liner installed – roughly $80 to $160 per foot depending on diameter and liner system – so the math is straightforward once we measure.

Material choice matters just as much. We use professional-grade liner systems from DuraFlex and Olympia Chimney – not the thin-wall flexible liner you’ll find on a supply website. The difference in wall thickness affects both safety and lifespan. On masonry work, we source brick that matches the original as closely as possible; Smithtown has a lot of homes built in the 1950s through 1970s with a specific reddish-buff brick that takes effort to source correctly.

Access also plays a role. A chimney that’s reachable from a second-story roof with a standard ladder is less expensive to service than one that requires a staging scaffold – and any chimney over about 15 feet above the roofline typically needs one. We factor that into the upfront estimate so you’re not looking at an add-on charge later. The number on our estimate is the number on the invoice, full stop.

What Affects Chimney Liner & Rebuild Pricing in Smithtown

• Flue dimensions and length: Wider flues (needed for wood-burning fireplaces versus gas inserts) use more material and take longer to line. A 6-inch diameter liner for a gas furnace costs less than a 7-inch or 8-inch liner for an open-hearth fireplace. Longer flues – common in the two-and-a-half-story homes built throughout Smithtown and Kings Park in the postwar era – add liner material and labor proportionally.
• Liner type selected: A flexible stainless liner is the most common and most affordable solution when the existing tile flue is too deteriorated to patch but the chimney structure itself is sound. HeatShield resurfacing is a cost-effective middle option when the tile liner is cracked but the chimney doesn’t need full relining. Cast-in-place systems cost more but are often the right call for older rubble-core chimneys – a construction method common in homes built before 1950 in the older sections of Smithtown near Main Street and Landing Avenue.
• Extent of masonry damage: Water is the primary enemy of Long Island chimneys. Smithtown sits close enough to the Sound that freeze-thaw cycles hit hard every winter – we typically see the worst spalling and mortar deterioration in March and April after a cold, wet winter. The more brick and mortar that needs replacing, the higher the rebuild cost. A chimney that’s been leaking for three seasons costs more to fix than one caught early.
• Number of flues: Many older Smithtown homes – particularly those built with oil-to-gas conversion in mind during the 1960s – have two or even three flues in one chimney. Lining each flue separately drives cost up; rebuilding a multi-flue chimney requires more brick, more labor, and sometimes a wider scaffold setup.
• Scaffold and access requirements: Chimneys on steeply pitched roofs, tall structures, or those set away from the roofline in a way that prevents safe ladder access require staging scaffold. Scaffold rental and setup typically adds $400 to $1,200 to a job. We identify access requirements during the Level-2 inspection and include them in the upfront price.
• Permit requirements: In Smithtown, certain chimney work – particularly full rebuilds and liner installations connected to active appliances – may require a building permit through the Town of Smithtown Building Department. Permit fees and filing time vary, and work done without the required permit can create problems at resale. We handle permit coordination for jobs that require it and factor that into the scope.

How to Save on Chimney Liner & Rebuild

Get the Inspection Before You Guess at the Scope

The single most common reason Smithtown homeowners overpay for chimney work is starting with a phone quote instead of an inspection. A chimney that “just needs repointing” sometimes turns out to need a liner replacement too. The reverse is also true – we’ve had customers come to us after being quoted a full rebuild by another contractor, and our Level-2 camera inspection showed the flue tile was intact enough for HeatShield resurfacing at a fraction of the cost. Photos don’t lie. We show them to you directly and explain what they mean in plain English.

If you’ve already received a written estimate from another company and something about it doesn’t sit right, call us at (631) 814-2057 – we offer a Free Second Opinion on any written estimate. We’ve been doing this since 1984, and we’re not going to tell you the job is bigger than it is.

Bundle Work When the Technician Is Already There

If your chimney needs a new liner, it almost certainly needs a new crown too – and possibly a new cap. The incremental cost of adding a crown repair or a Gelco stainless cap while the technician is already on the roof is far less than scheduling a second trip. We scope everything during the initial inspection and present it as a full picture, not a series of upsells after the fact. Our technicians complete most jobs in a single visit, which saves you time and us travel – and we pass that efficiency along in the price.

Don’t Delay Past the Point Where Water Gets In

This is the most practical advice on this page: a cracked flue tile caught in October is a lining job. That same crack, after a winter of rain and freeze-thaw cycles, can compromise the surrounding masonry and turn a lining job into a partial rebuild. In Smithtown, the period from November through March is particularly hard on chimneys. A chimney crown that’s been shedding water for two seasons isn’t just a cosmetic issue – it’s water working its way into the mortar joints, brick faces, and ultimately the chase interior. Fixing it early is almost always cheaper than fixing it later.

Ask About Available Discounts

We offer a permanent 5% discount for seniors and veterans – no expiration date, no fine print. On a $4,000 liner job, that’s $200 back in your pocket. We also offer $50 off any repair over $250 and an $89 Seasonal Tune-Up that covers a Level-2 inspection and chimney sweep. If you’re unsure whether your chimney needs repair or just a cleaning, the Tune-Up is the right starting point.

Ask About the Free Estimate

We don’t charge to come out and look. Call (631) 814-2057 and tell us what you’re seeing – whether it’s a smell, a stain on the ceiling near the chimney, or a contractor who told you something that didn’t sound right. We’ll schedule a time, send a background-checked and uniformed technician, and give you a written estimate with no obligation and no pressure to sign anything that day.

FAQs – Chimney Liner & Rebuild Cost

How much does chimney liner replacement cost in Smithtown, NY?

Chimney liner replacement in Smithtown runs $2,400 to $6,800 for most residential flues, with the most common jobs – stainless steel flex liner for a wood-burning fireplace or gas appliance – landing between $2,800 and $4,400. Cast-in-place liners for older rubble-core chimneys sit at the higher end of that range. Flue length, diameter, and access all affect the final number. Call (631) 814-2057 for a free estimate – we’ll measure the flue and give you a written price before any work begins.

Is it cheaper to reline a chimney or rebuild it?

Relining is almost always less expensive than rebuilding, assuming the surrounding masonry is structurally sound. A stainless flex liner job runs $2,400 to $4,400; a partial masonry rebuild starts around $1,800 and climbs past $7,000 for taller sections. The decision shouldn’t be based on cost alone – a chimney where the brick and mortar are failing will keep failing around a new liner if the masonry isn’t addressed. Our Level-2 camera inspection shows exactly what’s happening inside and outside the flue so the recommendation matches the actual condition, not a preference for the more expensive option.

How long does a chimney liner last?

A properly installed stainless steel liner – using a quality system like DuraFlex – carries a manufacturer’s warranty of 15 to 25 years depending on the product line, and many last significantly longer when the chimney is swept and inspected annually. Cast-in-place liners, when installed correctly, can last the life of the chimney. HeatShield resurfacing is warrantied by the manufacturer and performs well in the Long Island climate when applied to a properly prepared flue. The liner’s lifespan drops sharply if water is allowed to enter the chimney unchecked – which is why the crown and cap matter as much as the liner itself.

Do I need a permit for chimney liner replacement in Smithtown?

In many cases, yes. The Town of Smithtown Building Department requires permits for certain chimney liner installations, particularly those connected to active heating appliances – gas boilers, furnaces, and oil burners. Full chimney rebuilds almost always require a permit. The specific requirement depends on the scope of work and the appliance involved. We handle permit coordination for jobs that require it and include that in the scope discussion upfront. Work done without a required permit can create complications when you sell the home, so it’s not something to skip to save a few days.

Can you fix a chimney liner the same day?

In many cases, yes. Most stainless flex liner installations in Smithtown take four to six hours for a single-flue chimney in accessible condition, which means a morning appointment often results in a completed, working liner the same day. More involved jobs – multi-flue liners, cast-in-place systems, or liner work combined with masonry repair – typically require a second day. We’ll tell you exactly what to expect at the estimate stage so you can plan accordingly. Our technicians complete most jobs in a single visit, and we don’t leave a job open-ended. Call (631) 814-2057 to discuss timing.

What are the signs that a chimney liner needs replacing?

The clearest signs are: white efflorescence staining on the chimney exterior, a persistent smoky smell in the house even when the fireplace isn’t in use, visible cracks or fallen tile fragments in the firebox, or a failed Level-2 inspection showing deteriorated flue tile. In Smithtown and the surrounding areas of St. James and Nesconset, we also see a specific pattern with homes built in the 1960s and early 1970s – the original clay tile liners in those chimneys are now 50 to 60 years old and often at or past the end of their service life, even when the chimney looks fine from the outside. A Level-2 camera inspection is the only way to know for certain.

How much does a full chimney rebuild cost in Smithtown?

A full chimney rebuild – from the firebox or smoke chamber up to the cap – runs $8,000 to $18,000 for most Smithtown homes, with the range driven by chimney height, number of flues, brick type, and scaffold requirements. Taller chimneys on two-and-a-half-story homes or those requiring matching historic brick sit at the higher end. A partial rebuild, covering only the section above the roofline, typically costs $1,800 to $7,000 depending on how many courses of brick need replacing. Every rebuild we do is covered by the 90-Day Done Right Promise – in writing, no arguing, no paperwork shuffle if something isn’t right.

What the 90-Day Done Right Promise Means for This Work

Chimney liner and rebuild work involves materials and labor that need to cure, settle, and perform through at least one heating season before you know everything went in correctly. We back every job with the 90-Day Done Right Promise: if the work isn’t right, we come back and make it right. In writing. No arguing, no routing you through a call center, no waiting for a supervisor to call back. Russell Haines built Hearthstone Chimney Co. on the principle that a craftsman stands behind what he builds, and that standard applies to every technician who goes out under our name.

We also document every job with the photos from the Level-2 inspection – before and after – so you have a visual record of what was done and why. That documentation matters if you’re selling the home, applying for insurance, or simply want to know what you paid for.

Why Smithtown Homeowners Call Hearthstone

There are a few chimney companies on Long Island that will quote a liner job over the phone without seeing the flue. We’re not one of them. In 42 years of serving communities from Smithtown through Hauppauge, Kings Park, St. James, Commack, and Nesconset, we’ve seen what happens when liner work gets scoped from a description rather than a camera. It either gets over-scoped and the homeowner pays for work they didn’t need, or it gets under-scoped and the liner fails prematurely because the underlying condition wasn’t addressed.

Our approach is slower in the front end and cleaner in the back end. We inspect first, document with photos you can see yourself, write a plain-English estimate with a firm number, and then do the work with professional-grade materials from DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield – brands that carry real manufacturer warranties and perform in the Long Island climate. For more on what a full liner and rebuild project looks like, our Chimney Liner & Rebuild in Smithtown page covers the process in detail.

We’ve been answering the phone with a live person since 1984 – not a voicemail, not an app, not a callback queue. If you call at 7 in the evening because you noticed a smell or a stain and you want to talk it through before scheduling, someone picks up. That’s not a marketing line. It’s how we’ve operated for over four decades.

You can learn more about our full range of work on our home page, or call us directly at (631) 814-2057.

Key Takeaways

• Chimney liner replacement in Smithtown typically costs $2,400 to $6,800, with most wood-burning fireplace liner jobs landing between $2,800 and $4,400.
• Partial chimney rebuilds run $1,800 to $7,000; full rebuilds from firebox to cap range from $8,000 to $18,000+.
• Flue length, liner type, masonry condition, and scaffold requirements are the main cost drivers in the Smithtown market.
• Delaying liner or rebuild work past the point where water is entering the chimney consistently turns a lining job into a masonry job – and costs more.
• Many homes in Smithtown built in the 1950s through 1970s have original clay tile liners that are now 50 to 60 years old and due for inspection or replacement.
• Hearthstone offers a free estimate, a Free Second Opinion on any written estimate, and a permanent 5% senior and veteran discount.
• All work is backed by the 90-Day Done Right Promise – in writing, no arguing.

Ready to Get a Firm Number?

If you’ve been putting off the call because you weren’t sure what it would cost, now you have a range. The next step is getting the exact number for your specific chimney – and that starts with a free inspection and estimate. Call (631) 814-2057 and a live person will answer. We’ll schedule a time that works for you, send a background-checked, uniformed technician, document what we find with Level-2 camera photos, and give you a written estimate with no obligation to proceed. The number on the estimate is the number on the invoice. That’s how Russell Haines has run this company since 1984, and it’s not changing.

Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Smithtown, NY since 1984.

Pricing reflects the Smithtown market as of 2026. Hearthstone Chimney Co. offers free estimates – call (631) 814-2057.