Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
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AfterHow Much Does Chimney Liner & Rebuild Cost in Commack?
Chimney liner replacement in Commack, NY typically runs $1,800 to $4,500 depending on liner type, flue length, and whether the firebox or crown needs work at the same time. A full chimney rebuild – where the masonry from the roofline up is torn down and relaid – usually falls between $3,500 and $9,500 for most Commack homes, and is covered by our Chimney Liner & Rebuild services. Both jobs are same-day or two-day projects for an experienced crew with the right materials on the truck.
If you want a number tied to your specific flue before anything else, call (631) 502-3612 – we give upfront pricing before a single tool comes off the truck, and the estimate is free.
Chimney Liner & Rebuild Cost Breakdown (2026)
The table below reflects what Wendell and the crew are actually quoting in Commack and the surrounding area right now. These are real-world ranges, not national averages pulled from a trade magazine.
| Service | Typical Range (Commack, 2026) | Notes |
|---|---|---|
| Flexible stainless steel liner (gas appliance) | $1,800 – $2,800 | Single-flue, average two-story colonial |
| Flexible stainless steel liner (wood-burning fireplace) | $2,200 – $3,400 | Heavier gauge required; longer flue on older Commack capes adds cost |
| Cast-in-place liner (HeatShield or poured system) | $2,500 – $4,500 | Best for older, irregularly shaped flues – common in pre-1970 Commack ranches |
| Rigid stainless liner (straight flue only) | $1,600 – $2,400 | Rarely used in Commack due to chimney offsets; installer must confirm geometry first |
| Partial chimney rebuild (crown to roofline) | $1,200 – $3,200 | Spalling brick above the flashing line; very common after Commack winters |
| Full chimney rebuild (roofline and above, repoint below) | $3,500 – $9,500 | Full tear-down and relay; includes new crown, flashing, and liner if needed |
| Firebox rebuild (interior only) | $900 – $2,800 | Depends on how many courses of firebrick need replacement |
| Crown repair or replacement | $300 – $850 | Often done alongside a liner job to avoid a second mobilization |
| HeatShield liner repair (no full liner needed) | $900 – $2,200 | Where the clay tile is cracked but structurally sound – Wendell will tell you honestly if this is the right call |
| Liner plus chimney cap (Gelco or Olympia) | Add $180 – $420 | Stainless or copper cap; skip the cap and the liner pays for moisture within two seasons |
What Pushes the Price Up
Flue height is the biggest single variable. A lot of Commack’s mid-century colonials – particularly the ones built out off Jericho Turnpike toward Sunken Meadow Road in the late 1950s and ’60s – have two-story chimneys that run 25 to 30 feet from firebox to cap. Every additional foot of liner material and labor adds to the final number. A short ranch chimney at 12 to 14 feet is a straightforward afternoon. A tall colonial with an offset can be a full two-day job.
Liner diameter matters too. A wood-burning fireplace flue needs more clearance than a gas insert flue. If the original clay tile is badly spalled or has open mortar joints – something we see often on Commack homes that sat vacant for a few years or went through a hard freeze without a cap – the prep work before the liner even goes in adds time and cost.
Permits: Suffolk County does require a permit for chimney liner work on most residential jobs. Factor in roughly $150 to $350 for the permit fee itself; we handle the filing, but that cost is real and honest quotes will include it.
What Affects Chimney Liner & Rebuild Pricing in Commack
- Flue height and geometry: Commack’s older colonials and split-levels frequently have offset flues – the chimney doesn’t run perfectly straight from firebox to cap. An offset means flexible liner, not rigid, and it takes longer to route correctly. The difference between a straight 14-foot flue and a 28-foot offset flue can be $800 to $1,200 in labor alone.
- Liner material: A basic aluminum liner for a gas water heater and a heavy-gauge stainless DuraFlex liner for a wood-burning fireplace are not the same product at the same price. Aluminum is cheaper but limited to low-temperature gas appliances. For wood, you want stainless, and for an older clay flue with irregular dimensions, a cast-in-place system like HeatShield is often the only option that actually seals the way it’s supposed to.
- Condition of the existing masonry: If the brick above the roofline is sound, a liner job stays a liner job. If the brick is spalling, the mortar joints are open, and the crown is cracked – which is what we see on probably one in three Commack homes we inspect that have clay tile damage – the masonry work has to come first, or the liner is just a new component inside a failing shell.
- Suffolk County permit requirements: As of 2026, liner installations in Commack that connect to a primary heating appliance require a permit through Suffolk County. This is not optional and skipping it creates problems when you sell the house. We pull the permit; we just want you to know it’s a real line item in the quote.
- Roof pitch and access: Some of Commack’s newer developments near Veterans Memorial Highway have steeper roof pitches than the original post-war housing stock. Steeper roof means more rigging time and sometimes a different staging setup. It’s not a dramatic cost difference, but it’s honest to say it exists.
- Combining jobs: If you’re already paying for a crew to set up, adding a crown repair, a new cap, or a smoke chamber parge coat at the same visit costs significantly less than scheduling each as a separate job. We’ll always tell you what makes sense to bundle and what can wait – that’s just the practical answer, not a upsell.
How to Save on Chimney Liner & Rebuild in Commack
Get the inspection first – and get it in writing
The number-one thing Commack homeowners do that costs them money is act on a verbal estimate from a sweep who looked at the chimney from the driveway and quoted a liner over the phone. A Level 2 camera inspection – mandatory before any liner or rebuild job – takes 45 minutes and gives you actual footage of the flue interior. You’ll see the crack, the separation, the creosote shelf, or whatever else is actually there. That footage is what drives the real scope. Without it, you’re guessing. Top Hat Chimney includes the camera inspection as part of the estimate process. Call (631) 502-3612 and we’ll set a time that works.
Don’t schedule in late fall if you can help it
October and November are the busiest months for chimney work in Commack. Everyone waits until the first cold snap and then realizes the fireplace hasn’t been touched since March. If you can schedule a liner or rebuild in late winter or spring – February through May – you’ll have more scheduling flexibility and in some cases better material availability. The chimney doesn’t care if it’s cold when it gets lined. The liner installer does prefer not to work in a January nor’easter, but spring is genuinely the sweet spot.
Bundle related work into one visit
If the liner inspection reveals a cracked crown, get the crown done the same day. If the cap is missing or the wrong size, add it to the order. Every additional mobilization – meaning a second truck, a second setup, a second permit-inspection scheduling slot – costs real money. We’ll tell you honestly what can wait a season and what needs to happen now, but if something needs doing within the next year anyway, doing it while the crew is already on your roof almost always saves $200 to $500.
Ask about the standing offers
Top Hat Chimney permanently offers $40 off any repair over $200, a 10% discount for seniors and veterans – always, no expiration – and a free second opinion on any written estimate you’ve already received from another company. If you’ve gotten a quote from a national outfit that sounds high, bring the paper. Wendell will look at it and tell you straight whether it’s fair, padded, or missing something important.
Don’t delay once you know there’s a problem
A hairline crack in a clay flue tile is a $900 HeatShield repair today. If it opens up over a winter of freeze-thaw cycles and the tile sections separate, you’re looking at a full liner or a section of masonry rebuild. Commack winters – the kind that go from 50 degrees to 18 degrees in 48 hours – are hard on masonry. The Suffolk County clay soil doesn’t help either; chimney footings shift, and that stress works its way up the stack. Catching things early is the only real way to avoid the bigger number.
FAQs – Chimney Liner & Rebuild Cost in Commack
How much does chimney liner replacement cost in Commack, NY?
Chimney liner replacement in Commack runs $1,800 to $4,500 for most residential jobs, depending on liner type and flue length. A flexible stainless liner for a gas appliance on a standard two-story colonial is usually at the lower end of that range. A wood-burning fireplace liner on a taller chimney with an offset will be toward the upper end. The only way to get an accurate number for your specific flue is a camera inspection – call (631) 502-3612 and we’ll schedule one at no cost to you.
How much does a chimney rebuild cost in Commack?
A partial rebuild – brick from the roofline up, new crown, new cap – typically runs $1,200 to $3,200 in Commack. A full rebuild, where everything is torn down and relaid from the roofline, including firebox repairs and a new liner, is usually $3,500 to $9,500. The wide range reflects genuine differences in chimney height, brick condition, and how much of the flue needs to come down. Wendell can give you a specific number after seeing the stack – not before, because quoting a rebuild from the driveway is how homeowners get burned by a number that changes at the door.
Do I need a permit for chimney liner work in Commack?
Yes. Suffolk County requires a permit for chimney liner installations connected to a primary heating appliance in Commack. Permit fees run roughly $150 to $350. Top Hat Chimney handles the permit filing; we just make sure it’s on the written estimate so you know exactly what you’re paying and why. Skipping the permit is a real problem at resale – home inspectors routinely check for this.
Is it cheaper to repair the liner or replace it?
Repair wins if the clay tile is structurally intact and the damage is limited to mortar joint failure or minor cracking. A HeatShield or cast-in-place repair in that scenario runs $900 to $2,200 versus $1,800 to $4,500 for a full liner. Replacement is the right call when the tile has separated, there are multiple fractures, or the flue dimensions are so irregular that the repair material can’t bond properly. The Level 2 camera inspection tells you which situation you’re in – there’s no honest way to answer this question without footage. Call (631) 502-3612 to book an inspection and we’ll give you a straight answer.
How long does chimney liner installation take in Commack?
Most liner installations are completed in one day. A straightforward flexible liner on a single-flue chimney typically takes three to five hours from the time the crew arrives. A larger job – tall chimney, offset flue, combined crown repair – may run into a second day. We give you a realistic time estimate before the job starts, not a range so wide it means nothing. If we need a second day, we’ll tell you before we leave on day one.
What’s the difference between DuraFlex and HeatShield – and which do I need?
DuraFlex is a flexible stainless steel liner system – it goes in as a new liner when the old clay tile is damaged beyond repair or needs to be bypassed entirely. It’s the most common liner installation we do in Commack. HeatShield is a resurfacing system – it fills and seals cracks in existing clay tile without removing the tile itself. HeatShield is the right call when the tile is cracked but the flue geometry is still basically intact and the structural integrity is there. Which one is right for your chimney depends entirely on what the camera shows. Wendell will walk you through the footage and explain which product makes sense before you commit to anything.
Why Commack Homeowners Call Top Hat Chimney
Wendell Pike has been inside chimneys in Commack and across Suffolk County since 1999. That’s over 29 years of knowing what a pre-1970 Commack ranch chimney looks like from the inside, what the clay tile failure patterns are in homes built during the post-war construction boom between Jericho Turnpike and the Northern State Parkway corridor, and what happens to masonry in this particular Long Island climate when a homeowner skips a season of maintenance.
Top Hat Chimney is locally owned. Wendell puts his name on every job and backs it with the 90-Day Done Right Promise – in writing, on every invoice. If something’s not right within 90 days, one call brings him back at no additional cost. That’s not a marketing line. It’s the actual policy, and it’s been the policy since the company opened.
For Chimney Liner & Rebuild in Commack, the process is simple: one phone call, one inspection, one written estimate with upfront pricing before anything starts. No number changes at the door. The number you hear on the phone is the number on the invoice.
We’re also part of this community in the ordinary sense. The crew that shows up at your house is the same crew you’d run into at the diner on Jericho Turnpike on a Saturday morning. That matters more than any certification hanging on a wall, and it’s why our repeat customers have been calling the same number for more than two decades. Learn more about everything we do on our home page.
When you’re ready to get a real number – not a ballpark, not a range from a driveway glance – call (631) 502-3612. A live person picks up, any hour. The estimate is free. The pricing is upfront. And if it turns out your chimney doesn’t need what you thought it did, Wendell will tell you that too.
- Free written estimate – no obligation, no trip charge inside the service area
- Upfront pricing before work begins – the quote is the price
- 90-Day Done Right Promise on every job, in writing
- Senior and veteran discount: 10% off, always
- $40 off any repair over $200
- Free second opinion on any competing written estimate
- Suffolk County permit handling included
- DuraFlex, HeatShield, Gelco, Olympia, Famco, and Copperfield materials
Call (631) 502-3612 to schedule your free estimate. Lines are open around the clock.
Pricing reflects the Commack market as of 2026. Top Hat Chimney offers free estimates – call (631) 502-3612.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Commack, NY since 1999.
What Our Customers Say
"Turns up in the hat, which the children thought was the best thing that had ever happened, and left the hearth cleaner than he found it."
- Josefina Aranda"We bought a house with a fireplace nobody had touched in a decade. He ran a camera up it, found a cracked liner tile, and told me plainly not to light a fire until it was fixed. He could have swept it, taken the money and said nothing."
- Marcus Elderidge"Creosote build up was bad enough that he showed me a jar of it. Explained the difference between the stages and why the wood I had been burning was the cause. I have burned seasoned wood ever since."
- Gordon Selkirk