Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 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.
Chimney Company in Duarte, CA
Chimney repair in Duarte means working on flues that have been through decades of foothill weather, Santa Ana wind events, and regular winter fires. We see mid-century masonry chimneys with cracked crowns and rusted dampers, plus newer foothill estates where the original liner was never quite right for how the fireplace actually gets used. Ontario Chimney handles the full repair scope, from a simple cap replacement to a full DuraFlex reline, and we have served Duarte since 2014. Call (833) 467-7685 when you want a straight answer about what your chimney actually needs.
Why Duarte Homes Are Different
Duarte sits right at the foot of the San Gabriel Mountains, and that changes the chimney work. The foothill edge of town, particularly in the 91008 ZIP near Bradbury, falls inside a wildfire-risk interface zone where local fire-safety rules push harder on spark arrestors and chimney screens than they do in flat inland cities. A single ember escaping an uncapped flue on a Santa Ana night is exactly the failure mode those codes were written to prevent, so we treat spark-screen compliance as part of the repair job here, not an add-on.
The housing stock runs from 1960s single-story ranch homes to larger foothill estates built in the last twenty years. The older tracts are where we find the most structural work: clay tile liners that have spalled after decades of heating cycles, crowns that have cracked open under Duarte’s hot, dry summers, and flashing that has pulled away from the roofline. Homes with wood-burning inserts and stoves put more heat into the flue, which accelerates liner wear. That means repair work in Duarte is often more than a patch job. It is a matter of getting the flue back to a condition that handles combustion gases safely and passes a visual inspection when the time comes.
Styles & brands we work with
Our Main Duarte Services
Most Duarte homeowners call us for one of two things: a chimney sweep before burn season, or dryer vent work after they read about how lint fires start. Both are covered in detail on their own Duarte pages.
Chimney Sweep in Duarte
A sweep in Duarte removes creosote and soot from the flue, smoke chamber, and firebox, and it includes a safety check of the damper, cap, and visible masonry. Because this area carries a real wildfire-season risk, we also confirm the spark arrestor is intact and properly seated. That detail matters more here than in most cities. The full breakdown of what a sweep covers, what it costs, and when to book it is on our Chimney Sweep in Duarte page.
Dryer Vent Cleaning in Duarte
Dryer vents clog with lint over time, and the CPSC has documented thousands of dryer-related fires nationally each year. In Duarte, where many homes have longer interior vent runs from laundry rooms on the first floor to exterior walls, that lint builds faster. We clean the full run, check the termination hood, and verify airflow with the dryer running. This is a standalone fire-safety service for us, not a throwaway add-on. See the full scope on our Dryer Vent Cleaning in Duarte page.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Chimney Repair in Duarte
Chimney repair in Duarte is shaped by two local realities. Older ranch homes from the 1960s and 1970s have clay tile liners that are now at the end of their service life, and the hot, dry summers followed by cool winter burning cycles accelerate crown cracking and mortar deterioration. A repair here is rarely just cosmetic. It means restoring the flue so combustion gases exit the house correctly and the chimney survives another decade of foothill weather. Ontario Chimney handles everything from cap work to full liner replacement, and we stock or source parts through Copperfield and Olympia Chimney, the two largest professional chimney supply distributors in the trade. For a deeper look at our repair capabilities, see our Chimney Repair hub.
Chimney Cap Installation
Signs you need it
You see daylight or rain entering the fireplace, hear animals inside the flue, or notice rust staining on the damper and firebox below.
What it costs in Duarte
A standard chimney cap installation in Duarte runs between $300 and $600 for the cap and labor, while custom stainless caps with taller mesh screens for foothill spark protection run $600 to $900.
How we do it
We measure the flue tile, specify the right cap for your chimney type and local spark-arrestor requirements, and secure it to the crown with masonry anchors and weather-resistant fasteners.
Chimney Cap Replacement
Signs you need it
The existing cap is rusted through, the mesh is torn or missing, or the old cap has pulled loose and no longer seals the flue against embers and rain.
What it costs in Duarte
Cap replacement in Duarte typically costs $350 to $650, with the higher end applying to oversized flues or caps with reinforced spark screens for WUI-area homes.
How we do it
We remove the failed cap without damaging the crown, inspect the exposed flue tile, and install a replacement cap sized to your flue’s internal and external dimensions.
Chimney Liner Installation
Signs you need it
Chunks of clay tile show up in the firebox, there is smoke backing into the room, or a camera inspection reveals cracked or missing flue sections.
What it costs in Duarte
A stainless liner installation in Duarte runs $2,800 to $5,200 depending on flue height and access, with multi-story foothill homes landing at the upper end.
How we do it
We run a camera inspection upstream first, then install a correctly sized DuraFlex liner, insulate where required, and reconnect the appliance or fireplace with proper top and bottom terminations.
Chimney Flashing Repair
Signs you need it
Water stains on the ceiling near the chimney, damp drywall around the fireplace, or visible gaps where the chimney meets the roofline.
What it costs in Duarte
Flashing repair in Duarte is priced by the linear foot of new flashing, generally $250 to $600 for the repair and reset, with full replacement running higher.
How we do it
We remove the failed flashing, cut and install new step and counter flashing, seal the transition with a quality roofing sealant, and check the mortar joint at the roofline for cracks.
Chimney Crown Repair
Signs you need it
The crown has visible cracks, spalling concrete, or standing water after rain, which lets water migrate into the flue and brickwork.
What it costs in Duarte
Crown repair in Duarte typically runs $300 to $700 for crack sealing and resurfacing, while a full crown rebuild with proper overhang runs $800 to $1,500.
How we do it
We evaluate the crown’s slope and thickness, seal or rebuild it with a concrete mix designed for chimney exposure, and ensure water sheds away from the flue rather than pooling.
What Chimney Repair Costs in Duarte
| Item | Typical range in Duarte |
|---|---|
| Chimney cap installation | $300 – $900 |
| Chimney cap replacement | $350 – $650 |
| Chimney liner installation | $2,800 – $5,200 |
| Chimney flashing repair | $250 – $600 |
| Chimney crown repair | $300 – $1,500 |
Do I really need a new liner for my older Duarte home?
Not always. If the original clay tile liner is intact and properly sized, you may only need a sweep and a crown repair. We confirm the liner’s condition with a camera inspection before recommending anything, and we will show you the footage so you can see exactly what we see.
Can my chimney wait another season if the crack looks small?
Small cracks in the crown or mortar joints let water in, and Duarte’s dry summer heat does not prevent that. Water plus a winter fire cycle forces cracks wider. A crown repair caught early costs a few hundred dollars; a full rebuild after a wet winter costs noticeably more. Call (833) 467-7685 for a free estimate.
Brands We Service in Duarte
We work with a curated set of professional-grade brands: DuraFlex for relining, Famco for caps and dampers, and HeatShield for ceramic resurfacing when a full liner tear-out is not the right call. These are the same materials certified chimney professionals specify, not hardware-store substitutes. See our brands for more on what we stock and install.
See the difference
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After
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AfterPricing for Chimney Company in Duarte, CA
| Service | Typical range in Duarte |
|---|---|
| Chimney cap installation | $300 – $900 |
| Chimney cap replacement | $350 – $650 |
| Chimney liner installation | $2,800 – $5,200 |
| Chimney flashing repair | $250 – $600 |
| Chimney crown repair | $300 – $1,500 |
What pushes prices up in Duarte is access. Steep foothill lots, multi-story chimneys, and flues that need scaffolding or roof work all add labor. What does not change is our upfront pricing: you get a written quote before any work starts, and the number we give you is the number you pay.
Neighborhoods We Serve in Duarte
Ontario Chimney works throughout Duarte, including the foothill edge where wildfire-interface codes apply, the mid-century tracts just north of Huntington Drive, and the newer subdivisions climbing toward Bradbury. We know which neighborhoods tend to have original liners, which have HOAs with chimney-screen rules, and which lots make roof access tricky.
- Royal Oaks
- Rancho Duarte
- Northview
- Foothill estates near Bradbury
- Duarte Mesa
Most Duarte repair calls are scheduled within a few days, and we route sweeps and estimates together when we can to keep the trip count down.
Service Area – Cities Near Duarte
Beyond Duarte, our crews cover the surrounding San Gabriel Valley foothill communities. We regularly work in Bradbury, CA, where large estate chimneys and strict WUI codes require documented spark-arrestor compliance. We also serve Monrovia, CA, Baldwin Park, CA, and Mayflower Village, CA, so the same crew that inspects your flue can handle the property next door when needed.
Serving Duarte, CA — Our Local Coverage Area
We’re based in the Duarte area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About Chimney Company in Duarte
Most repair estimates in Duarte are scheduled within three to five business days, depending on the season and whether scaffolding is needed. Burn-season urgency knocks some jobs up the queue, but we never rush a liner installation to hit a deadline. Call (833) 467-7685 and we will give you an honest window.
It depends on the scope. A cap replacement or flashing repair rarely triggers a permit, but a full liner installation or structural rebuild can. We tell you what applies to your specific property and handle the paperwork we are allowed to file directly, so you are not stuck sorting out code requirements on your own.
Yes. We serve 91008, 91009, and 91010, which spans the entire city from the foothill edge down to the 210 corridor. If you can give us your cross streets when you call, we can usually tell you exactly when our next crew is in your part of Duarte.
When your chimney needs work in Duarte, call Ontario Chimney at (833) 467-7685 for a free estimate. We will tell you what we found, show you the evidence, and give you options without pushing work that does not need doing.
What happens when you call
- 1A real person answersNo phone trees — talk to a local chimney cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Duarte Customers Say
"Level two inspection before we bought the house. The report was detailed enough to use as a negotiating point and he explained every photo in it."
— Sarah Sullivan"Good work. The written inspection report took about a week to arrive after I asked for it, which was slower than I expected."
— Adriana Morales"Cap keeps the birds out now, which after two springs of scratching noises is worth every penny."
— Tara Novak