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 Monrovia, CA
Chimney repair in Monrovia means dealing with what the San Gabriel foothills do to a masonry chimney. We work on early-1900s Craftsman homes near downtown, mid-century ranches in the flats, and hillside houses in 91016 where Santa Ana winds carry ash, charred debris, and grit straight into flues. Most of our Monrovia calls start with either a cracked crown, a damaged cap, or a clay tile liner that’s spalling after sixty-plus years of heat cycling. If you need someone to look at your chimney, call Ontario Chimney at (833) 467-7685 and we’ll tell you what you’re actually dealing with.
Why Monrovia Homes Are Different
Monrovia sits at the bottom of the San Gabriels, and that changes chimney work in ways flatland crews don’t always recognize. The 91016 hillside neighborhoods are full of homes built with open fireplaces and masonry chimneys in the early-to-mid 20th century, and many of those original flues were never fitted with a modern liner. Clay tile cracks. Mortar joints erode. When a Santa Ana wind event blows through, it drags wildfire ash and charred debris off the foothills and deposits it on rooftops and into uncapped chimneys. We’ve swept Monrovia flues after wind events and pulled out handfuls of ash that blew in from fires ten miles away.
The housing stock itself splits into three distinct jobs. Near downtown, you have Craftsman and Spanish Colonial homes where the chimney is often original to the structure, built before stainless liners were standard. In the flatland ranch houses, you see chimneys that were added in the 1950s and 1960s, sometimes with undersized flues for the fireplace they serve. Up in the hills, custom homes have masonry fireplaces with caps that get battered by wind and sun. After a Santa Ana event or a nearby brush fire, we routinely find caps that are dented, missing, or rusted through. That’s not a flatland problem. It’s a Monrovia one.
Styles & brands we work with
Our Main Monrovia Services
Most Monrovia homeowners call us for one of two things, and both are fire-safety work first. Here’s what each involves locally.
Chimney Sweep in Monrovia
A chimney sweep in Monrovia is seasonal in a way it isn’t in the LA basin. Cool winter evenings push heavy fireplace use, and the dry heat of summer bakes creosote into a hard, glassy glaze that’s harder to remove than the flaky deposits you get in humid climates. We sweep the full flue, check the cap and crown while we’re up there, and tell you what we found with photo evidence. Chimney Sweep in Monrovia covers the full scope of what a sweep includes locally, including how often you should expect to do it with regular fireplace use.
Dryer Vent Cleaning in Monrovia
Dryer vents in Monrovia homes run through attics, crawlspaces, and exterior walls, and lint builds up regardless of how clean the laundry room is. The NFPA identifies failure to clean dryer vents as a leading cause of home dryer fires, and the ducting in older Monrovia ranch houses is often ribbed plastic or foil, which traps lint faster than rigid metal. We clean the full vent run from dryer to exterior termination and check for crushed or disconnected sections. Dryer Vent Cleaning in Monrovia explains the fire-risk side of this service and what a proper cleaning involves.
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 Monrovia
Chimney repair in Monrovia is usually about age and exposure. The hillside homes in 91016 were built when clay tile liners were the standard, and after decades of heat from winter fires and the dry Santa Ana season, those tiles crack and spall. Crowns, which take direct sun and wind-driven rain, erode until water gets into the masonry and starts the freeze-thaw cycle that crumbles bricks. What starts as a small crack becomes a structural problem if it’s ignored. Chimney Repair is the full service line, but here’s what it means for Monrovia specifically.
Chimney Cap Installation
Signs you need it
You don’t have a cap, the cap you have is rusted through or bent, or you find twigs, ash, or birds in the flue.
What it costs in Monrovia
A standard cap with installation in Monrovia typically runs $225 to $400 depending on flue size and the condition of the crown it mounts to.
How we do it
We measure the flue, remove the old cap if one’s there, clean and prep the crown surface, and install a properly sized cap that blocks debris without restricting draft.
Chimney Liner Installation
Signs you need it
Your inspection shows cracked or missing clay tile, you have a gas appliance venting into an unlined flue, or you smell combustion gases in the house.
What it costs in Monrovia
Stainless steel liner installation in Monrovia typically runs $2,500 to $5,000 depending on the flue height, roof access, and whether the old liner needs breaking out first.
How we do it
We inspect the existing flue, clean it, pull a DuraFlex flexible liner through if the flue has offsests, insulate as needed, and connect the liner to the appliance or fireplace with proper terminations.
Chimney Flashing Repair
Signs you need it
Water stains appear on the ceiling around the chimney, the flashing pulled away from the masonry, or you see rust and gaps where the roofing meets the chimney.
What it costs in Monrovia
Chimney flashing repair in Monrovia typically runs $350 to $750 for partial replacement, with full replacement and masonry sealing going higher.
How we do it
We remove the old flashing, cut a fresh reglet into the masonry, install step flashing and counter-flashing, and seal the joints with a roofing-grade sealant that holds up to sun and Santa Ana grit.
Chimney Crown Repair
Signs you need it
The concrete crown is cracked, spalling, or missing pieces, and you see water intrusion in the firebox or attic.
What it costs in Monrovia
Crown repair in Monrovia typically runs $450 to $900 for a resurface with a proper crown mix, with full rebuilds pricing higher on larger chimneys.
How we do it
We clean and prep the old crown, build a bond break, apply a new properly sloped crown mix so water runs off, and seal the masonry around it.
What Chimney Repair Costs in Monrovia
| Chimney cap installation | $225 – $400 |
| Chimney liner installation | $2,500 – $5,000 |
| Chimney flashing repair | $350 – $750 |
| Chimney crown repair | $450 – $900 |
These are the prices we see most often in Monrovia for straightforward jobs. Hillside access, second-story flues, and liner breakouts in chimneys built before 1940 all push the number toward the upper end or beyond. We give you a flat quote before work starts, so the number doesn’t move on you.
How long does a chimney liner last in a Monrovia home?
A properly installed DuraFlex stainless liner typically lasts 20 to 30 years, but Monrovia’s dry heat and the thermal cycling from heavy winter use shorten the life of the mortar joints around it. Annual inspection catches issues before they become replacements. Call (833) 467-7685 for an inspection.
Can you repair a chimney without rebuilding it?
Yes. HeatShield ceramic resurfacing restores a cracked or spalled flue without tearing out the old liner, and crown and flashing repairs stop water intrusion without touching the masonry below. Rebuilds are only needed when the brick itself has failed.
Brands We Service in Monrovia
We use DuraFlex stainless liners on relining work, Famco caps and dampers, and HeatShield ceramic resurfacing. Parts come through Copperfield, so we’re installing the same materials specified by chimney professionals, not what’s on the shelf at a big-box store. Lead time on most parts is days, not weeks. Learn more about our brands.
See the difference
Before
After
Before
After
Before
AfterPricing for Chimney Company in Monrovia, CA
| Chimney sweep | $175 – $325 |
| Dryer vent cleaning | $125 – $250 |
| Chimney cap installation | $225 – $400 |
| Chimney liner installation | $2,500 – $5,000 |
| Chimney flashing repair | $350 – $750 |
| Chimney crown repair | $450 – $900 |
| HeatShield resurfacing | $2,000 – $4,000 |
| Masonry tuck-pointing | $500 – $1,200 |
Prices in Monrovia run slightly higher than the flatland LA average because of hillside access, older masonry that needs more prep, and the extra travel time up into 91016. Whatever the quote is, it’s flat and agreed before we start. The price you approve is the price you pay.
Neighborhoods We Serve in Monrovia
We work across both Monrovia ZIP codes, from the Craftsman blocks near Old Town up into the canyon-adjacent streets where driveways get steep and roof access takes longer. You’ll usually get us out within a few days, and hillside jobs don’t slow us down the way they do flatland-only crews.
- Old Town Monrovia and the Craftsman blocks around it
- The foothill streets above Foothill Boulevard in 91016
- Mid-century ranch neighborhoods in the flatlands
- Hillside custom homes near the canyon mouths
- Duarte-adjacent neighborhoods along the eastern edge of 91017
Service Area – Cities Near Monrovia
We serve the whole Foothill corridor, and plenty of our Monrovia customers ask us to look at rental properties and family homes in the neighboring cities. We cover Mayflower Village, CA, Duarte, CA, Bradbury, CA, and Arcadia, CA with the same pricing and the same flat-quote promise.
Serving Monrovia, CA — Our Local Coverage Area
We’re based in the Monrovia 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 Monrovia
Chimney sweeping and dryer vent cleaning don’t require a permit anywhere in Monrovia. Structural repairs like liner installation or a crown rebuild may need city review depending on scope, and we handle that paperwork as part of the job. Call (833) 467-7685 and we’ll tell you what applies to your house.
We’re based in Ontario and serve Monrovia weekly, so a standard sweep or dryer vent cleaning usually gets scheduled within a few days. Repair work depends on parts lead time, but most common caps, liners, and flashing materials are stocked or arrive within a week.
Yes. If you’re under contract on a house in 91016 or 91017, we can do a Level 2 chimney inspection with a camera, which is what most real estate transactions call for. You’ll get a written report with photos so you know exactly what you’re buying. Call (833) 467-7685 to schedule it before your inspection window closes.
Ontario Chimney has served Monrovia since 2014. If your chimney needs a sweep, an inspection, or a repair, call (833) 467-7685 for a free estimate and a straight answer.
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 Monrovia Customers Say
"Swept it, capped it, and installed a proper damper. The downdraft smell in the summer that we'd lived with for years is gone."
— David Park"Drop cloths everywhere, HEPA vac, and not a speck of soot on the carpet. I'd been dreading the mess for nothing."
— Bethany Padgett"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