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.
Fast, Reliable Chimney Sweep Across Duarte
A chimney sweep in Duarte typically costs $189 – $310 for a standard fireplace and $229 – $360 when a wood stove or insert is involved. Most jobs take 45 – 90 minutes and include creosote removal, a basic safety check, and a written report on what we found. Duarte sits at the foot of the San Gabriel Mountains, and the foothill edge of town in 91008 carries a wildfire-risk interface most cities never deal with, so our sweeps here aren’t just about a clean flue. They’re about making sure your chimney won’t throw an ember into dry brush during a Santa Ana wind.
We run crews from Ontario into Duarte every week, and we know the old ranch tracts off Mount Olive Drive and Huntington Drive as well as the newer estates up toward Bradbury. If you’re seeing soot, smelling smoke indoors, or you just bought a house in 91010 and nobody can tell you the last time the flue was checked, call us at (833) 467-7685. We’ll tell you what we found, show you the evidence, and give you options, not a scare pitch.
Why Ontario Chimney Is Duarte’s Preferred Chimney Sweep Company
We’re a full-service chimney and venting company, not a pressure-wash crew that decided to add sweeping to the menu. Our techs work on DuraFlex liner systems, HeatShield ceramic resurfacing, and Gelco and Famco components, the same materials certified chimney professionals specify. That matters in Duarte because so many homes here were built in the 1960s and 1970s, and those flues are now at the age where real decisions about relining or repair come up. Our Chimney Sweep team handles the cleaning, the inspection, and the repair, one company from start to finish.
Duarte homeowners tell us what they don’t want is a cleaner who shows up, does a brush run, and leaves them with a list of problems they can’t explain. We operate differently. Every sweep includes a camera inspection in our Level 2 service, and we’ll show you the photo evidence before we recommend anything. Al Vickers runs the company, and the standard he set from day one is that we don’t recommend work you don’t need. If your flue has a season or two left in it, we’ll say so plainly.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Chimney Services in Duarte
Chimney Services in Duarte cover everything from a simple annual sweep to a Level 2 camera inspection when you’re buying a home or haven’t had the flue checked in years. A standard chimney sweep in Duarte runs $189 – $310 depending on what you’re burning and how much creosote has accumulated. We serve all three Duarte zip codes, 91008, 91009, and 91010, and we’re familiar with the housing stock in each.
Creosote and Soot Removal
When you burn wood regularly, creosote condenses on the flue wall. In Duarte’s foothill homes, where cool winter nights mean steady burning, we regularly see first-degree creosote turn into second-degree glaze inside a single season. Our sweep removes the buildup mechanically and reports what stage it was in, which tells us how often you should schedule based on how you actually burn.

Fireplace Cleaning and Annual Sweeps
A fireplace used casually on weekends still needs an annual sweep, but Duarte homes with wood-burning inserts as a primary heat source often need two sweeps per heating season. We’ll give you a straight recommendation based on what we pull out of the flue, not a generic yearly reminder. Our team leaves the hearth clean, the damper working, and the firebox free of ash and debris.

Chimney Sweep Certified in Duarte
Chimney Sweep Certified work in Duarte means the tech who arrives at your home has been trained to inspect as well as clean, and to know the fire-safety code requirements specific to the San Gabriel foothills. We check spark arrestors and chimney screens on every single sweep in the 91008 area because WUI compliance isn’t optional there. A standard certified sweep with us in Duarte runs $189 – $310, and we stand behind the work with a satisfaction guarantee.
Level 1 and Level 2 Inspections
A Level 1 inspection is a visual check of the accessible parts of your chimney, which is what most annual sweeps include. A Level 2 inspection uses a camera to look inside the flue, at the smoke chamber, and at the crown, and we push for it in Duarte when a house is changing hands or when a fireplace hasn’t been used in years. The camera does not lie, and we’ll show you exactly what the inside of your flue looks like.
Wood Stove and Insert Sweeps
Duarte’s foothill tracts are full of wood stoves and Heatilator-style inserts running as primary heat. These burn hotter, load more creosote into the flue, and need attention more often than a decorative fireplace. We sweep these thoroughly and check the baffle, door gaskets, and ash pan so the unit works as it should through the winter.
Trusted Brands We Service in Duarte
We work with a curated set of professional-grade brands, and that includes the components we install in Duarte homes. When a flue needs relining, we use DuraFlex flexible stainless steel liners, which handle offset flues that rigid liners can’t navigate. For flues that haven’t degraded to the point of full replacement, we offer HeatShield ceramic resurfacing as a code-compliant alternative. Chimney caps and dampers come from Gelco and Famco, specified by chimney professionals, not picked off a hardware-store shelf. We keep common Duarte parts on the truck, which means fewer second trips and faster turnaround.
See the difference
Before
After
Before
After
Before
AfterCommon Chimney Sweep Problems We See in Duarte Homes
- Glazed creosote in wood-stove flues. Homeowners in the foothill tracts push past the safe sweeping interval, and first-degree creosote bakes into a hard, shiny glaze. That’s a chimney fire waiting for an ignition source, and it won’t brush out, it takes chemical treatment or mechanical removal.
- Missing or non-compliant spark arrestors. Foothill and WUI homes often run an open flue or an old cap that doesn’t screen embers. During Santa Ana wind events, a single ember from an uncapped chimney is the exact failure mode Duarte’s fire-safety rules are written to prevent.
- Spalled mortar and cracked flue tiles in 1960s ranches. The masonry flues in Duarte’s older tract homes are reaching the end of their usable life. Water intrusion, heat cycling, and time break down the mortar joints, and a camera inspection typically reveals the damage before any smoke or odor problem shows up.
- Dry, caked creosote from burning unseasoned wood. Duarte’s dry climate means green wood actually dries slower in the open air, and plenty of homeowners burn wood that hasn’t seasoned long enough. That loads the flue faster and forces a shorter sweeping interval than the textbook once a year.
Pricing for Chimney Sweep in Duarte, CA
A standard fireplace sweep in Duarte runs $189 – $310. A wood stove or insert sweep with the same creosote removal and inspection runs $229 – $360. If we’re adding a Level 2 camera inspection, expect $349 – $475 total for a typical single-flue home. What moves the number is how much creosote has built up, whether the flue has an offset that takes more time, and whether you’re in a 91008 foothill property where we’re also checking WUI compliance and spark-arrestor condition. We don’t charge by the scare. The price we quote is the price you pay, and every estimate is free. Call (833) 467-7685 for an exact quote based on your fireplace or stove.
We Also Serve Cities Near Duarte
Our crews regularly cover the neighborhoods around Duarte, including Chimney Sweep in Duarte and the surrounding foothill communities. We run routes through Bradbury, Monrovia, Baldwin Park, and Mayflower Village, so if you’re just over the city line, the drive time is short and we’ll quote you the same honest pricing. Call us and we’ll fit you into the nearest scheduled day.
Serving Duarte, CA - Our Local Coverage Area
We serve Duarte and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs About Chimney Sweep in Duarte
Yes, if your home is in the WUI zone along the 91008 foothill edge, a compliant spark arrestor or screened chimney cap is required by local fire-safety code, and we check it on every sweep. The rule exists because an ember from an uncapped flue landing in dry brush during a Santa Ana event is how a house fire starts a hillside fire. If your cap is damaged, missing, or doesn’t meet the mesh-size requirement, we can install a Gelco spark arrestor the same visit. Call (833) 467-7685 and we’ll check your WUI compliance as part of the sweep.
Every six to eight weeks of heavy burning, which for most Duarte wood-stove households means twice per heating season. Foothill properties burn more hot, steady fires, and we consistently pull second-degree creosote from flues that ran seven or eight months between sweeps. The shorter interval is not us being cautious, it’s what the loading rate requires. When we’re out at your place, we’ll base a schedule on what we actually removed, not a calendar guess.
Expect a Level 2 camera inspection, because the flue tiles in a 1960s Duarte ranch have had decades of heat cycling and they’re the most likely component to be cracked, spalled, or separated. We ran a camera on a ranch off Mount Olive Drive where the Heatilator insert was working fine but the liner behind it was coated in second-degree creosote and the firebox mortar was spalling. That homeowner got a sweep, a report with photos, and a clear list of what could wait and what couldn’t. Call (833) 467-7685 and we’ll walk you through the same process.
Yes, we run routes up toward Bradbury and the foothill edges beyond the main Duarte city grid, and we service rural properties on larger lots with longer driveways and outbuildings that have their own flues. The drive is not a problem, we plan Duarte days around the whole service area, and we’ll tell you up front when to expect us. We also handle multiple structures on one property in the same visit.
Burn dry, seasoned hardwood that’s been split and stacked under cover for at least six months, and build fires hot enough to maintain a clean burn instead of smoldering low overnight. Smoldering fires in a Duarte foothill winter are the quickest way to load a flue with sticky first-degree creosote that turns to glaze. We’ll show you what your wood is doing to your flue at the time of the sweep, and we’ll tell you honestly if your burning habits are causing the buildup faster than the average. Call (833) 467-7685 and we’ll schedule a sweep and a walkthrough.
Written by Al Vickers, Owner at Ontario Chimney, serving Duarte and the San Gabriel foothills.