Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
See the difference
Before
After
Before
After
Before
AfterHow Much Does Duct Repair & Sealing Cost in Mission Viejo?
Duct repair and sealing in Mission Viejo typically costs $450 to $2,800, with most single-family homes landing between $650 and $1,400. A straightforward sealing job on accessible attic ductwork runs $450 to $850, while repairing crushed flex runs, disconnected joints, or rodent-damaged sections pushes the total higher. The number that matters most is how much of your system is actually compromised, and we can tell you that after a short inspection.
Before the price means anything, the diagnosis has to be right. We run Rotobrush and Nikro equipment through the system to see what’s happening inside the ducts, because leaks and tears you can’t see from the attic hatch are usually the ones costing you money on your energy bill. Better air starts inside the ducts, and so does an accurate quote.
Key Takeaways
- Most Mission Viejo duct sealing jobs run $450 to $850; repair plus sealing on damaged systems runs $900 to $2,200.
- Full or extensive duct replacement climbs to $1,800 to $2,800 for a typical 1,800 to 2,400 sq ft home.
- Homes built before the mid-1980s in neighborhoods like Madrid and Casta del Sol often have original rigid metal ductwork that outlasts the flex type used in newer construction, which changes the repair approach.
- Attic heat in South Orange County runs duct systems harder than most of the country, and sealant failure along with flex duct degradation are the two most common findings we see in Mission Viejo.
- We clean it, and if it’s damaged, we fix it – sealing a dirty system just traps the debris you were trying to remove.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what the work actually bills out at across Mission Viejo in 2026. Ranges reflect a mix of single-story and two-story homes, with the low end for easy attic access and the high end for tight crawlspaces, vaulted ceilings, or runs buried behind finished drywall.
| Service | Typical Price Range | Notes |
|---|---|---|
| Full duct system inspection and leak test | $120 – $280 | Camera inspection plus pressure testing; credited toward repair if you proceed |
| Sealing accessible joints and seams (mastic + mesh) | $450 – $850 | Covers most single-story attic systems |
| Aerosol sealing of leaks up to 3/8 inch | $1,400 – $2,200 | Best for hard-to-reach runs and wall cavities |
| Flex duct run replacement (per run) | $180 – $400 | Price varies with run length and attic access |
| Rigid metal duct section repair | $250 – $600 | Common in older Mission Viejo construction |
| Repair of crushed, disconnected, or rodent-damaged ducts | $300 – $900 per area | Includes reconnection and re-insulation |
| Full duct replacement (1,800 – 2,400 sq ft home) | $1,800 – $2,800 | When more than 40% of runs are compromised |
| Insulation wrap upgrade on exposed attic runs | $150 – $450 | Reduces heat gain in summer |
| Air-quality upgrade install (Aprilaire or Honeywell filtration) | $350 – $1,200 | Bundle with sealing to save a visit |
What pushes a job toward the high end? Attic temperature and access are the biggest factors in Mission Viejo. A summer afternoon in an unvented attic here hits 140°F and above, which means a two-tech crew working a sealed-off system takes longer and the labor line reflects it. Two-story homes with duct runs sharing space with plumbing chases cost more to reach. If we find crushed flex duct behind a soffit, we open a small access panel and patch it afterward, and that drywall work shows up in the price. Damage from rodents is another upward driver; roof rats are common in neighborhoods bordering the foothills and open space, and chewed flex duct is one of the calls we get most often.
What Affects Duct Repair & Sealing Pricing in Mission Viejo
Six things move the number up or down more than anything else. Understanding them now will save you some sticker shock when the crew arrives.
- Home age and construction type. Homes built through the 1970s and early 1980s in Mission Viejo (a large share of the Madrid and Casta del Sol housing stock) often have rigid galvanized metal ductwork that needs section repair rather than full replacement. Newer construction leans on flex duct, which is faster to replace but fails sooner when it’s crushed or separated at the collar.
- Attic access and configuration. A single-story home with a walkable, unobstructed attic is the low end. Vaulted ceilings, low-pitch rooflines, and ductwork routed through soffits and wall cavities all add labor time, and labor is where most of the cost sits.
- How many leaks and how big. Hairline seams leaking a few percent of airflow can be sealed with mastic in under a day. Disconnected joints, tears over 3/8 inch, and collapsed sections need physical repair before any sealing happens, and that’s where the price difference between a $450 job and a $1,400 job lives.
- Rodent or pest damage. We see this a lot in homes near Oso Creek and the open-space edges around the city. Chewed duct wrap and contaminated flex duct require removal, not just sealing, and often the affected run has to be replaced outright.
- Whether cleaning is included. Sealing over a dirty duct system is throwing money at the wrong problem. When we find heavy debris or contamination, we recommend cleaning first. The added duct cleaning Mission Viejo cost typically adds $350 to $650 depending on system size and number of vents, and it’s the right order of operations.
- Air-quality upgrades bundled in. If you’re already up in the attic, installing an Aprilaire or Honeywell filtration system with the sealing work is genuinely cheaper than doing it separately. We carry and install both brands, so it’s one visit, one crew, one invoice.
One thing worth flagging: sealing is a good investment, but it’s not where the work stops if your system is also dirty. We treat cleaning and repair as two parts of the same job. If we’ve sealed a system that’s carrying years of construction dust, you’ll notice it the first time the AC runs. Worth reading our home page for how the full visit works.
How to Save on Duct Repair & Sealing
You can’t negotiate the physics, but you can structure the job to get more out of each dollar. Here’s what we tell customers who want to be smart about timing and scope.
- Get the inspection done before the work is scheduled. A $120 to $280 inspection tells you whether you need a $450 sealing job or a $2,200 repair, and that number is credited toward the repair if you hire us. Guessing is expensive; diagnosing isn’t.
- Bundle cleaning, sealing, and air-quality work into one visit. Three separate visits means three separate mobilization charges. One crew doing all of it is almost always cheaper than the sum of the pieces, and the Aprilaire or Honeywell install is cheaper while the attic is already open.
- Schedule in the shoulder months. Spring and fall are easier on attic work than a July afternoon in Mission Viejo, and the labor line reflects that. Not a discount we advertise, but it’s real in the quote.
- Fix the small leaks before they become a replacement. A $600 sealing job on a system 60% of the way through its life is genuinely cheaper than the $2,400 replacement you’ll face in two years. Sealing buys time.
- Ask for upfront pricing in writing. A free estimate should give you a line-item number you can hold the company to. We don’t quote ranges that magically grow once the truck arrives.
Free estimates are how we start every job. Call (833) 593-4407 and we’ll schedule the inspection.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in Mission Viejo?
Duct repair in Mission Viejo typically costs $300 to $900 per affected area, and a full repair-plus-sealing job on a typical home runs $900 to $2,200. The number depends on how many runs are damaged and how accessible the attic is. Call (833) 593-4407 for a free estimate – we’ll tell you the number before any work starts.
Is it cheaper to repair or replace my ductwork?
Repair is almost always cheaper if less than 40% of your duct runs are compromised. A repair-and-sealing job runs $900 to $2,200 versus $1,800 to $2,800 for full replacement, and aging metal ductwork in older Mission Viejo homes often has decades of life left after repair. We quote both options so you can decide.
How long does duct sealing take, and does it raise my bill?
Standard sealing on an accessible attic system takes one day, and no, sealing lowers your bill over time – the Department of Energy puts typical duct leakage at 20% to 30% of airflow, and sealing that gap translates to a real percentage off your energy cost. Call (833) 593-4407 for a free inspection.
Why does sealing cost more in some Mission Viejo homes than others?
Access and home age are the two big drivers. Single-story homes with open attics run toward the $450 to $650 end; two-story homes with vaulted ceilings and ductwork in wall cavities run toward $1,400 to $2,200 because every leak takes longer to reach. We inspect before we quote, so the number reflects your actual system.
Can I just seal the ducts myself?
No – and this is the safety note that matters. Duct sealing done wrong means working around attic heat, insulated electrical wiring, and in some cases the flue of a gas appliance. A sealed duct joint that’s leaking combustion gases back into the supply air is a serious hazard, and it’s not a job for foil tape and a Saturday afternoon. We carry Abatement Technologies equipment and Guardsman-grade protective products specifically so contamination and safety concerns get handled correctly. Call (833) 593-4407 for a free estimate.
If you’ve been putting off a repair because you don’t know what it will cost, we get that. A free estimate is the way to find out without committing to anything, and the inspection is the part that tells you whether you’re looking at $450 or $2,400. We’re a dedicated air-duct specialist – cleaning, repair, and air-quality work under one company, with the equipment and brand relationships to back it up.
Call (833) 593-4407 to schedule your free estimate for duct repair and sealing in Mission Viejo. We’ll inspect the system, tell you exactly what’s wrong, and give you a written, line-item price before any work starts.
Related Pages
- Duct Repair & Sealing in Mission Viejo – the full service page for this city
- Dryer Vent Cleaning in Mission Viejo – fire-safety service, cleaned by the same crew
- Duct Cleaning Cost in Mission Viejo – what cleaning adds to your total
- Duct Cleaning in Laguna Niguel – nearby city service
- Duct Cleaning in Lake Forest – nearby city service
- Duct Cleaning in Rancho Santa Margarita – nearby city service
- Duct Cleaning in Irvine – nearby city service
- Duct Cleaning in Dana Point – nearby city service
- Dryer Vent Cleaning Cost Guide – pricing for the sister service
- Air Duct Cleaning vs Duct Repair – which one your system actually needs
- Signs Your Ductwork Needs Repair – how to diagnose before you call
- Air Duct Repair Cost Guide – national context for local pricing
Pricing reflects the Mission Viejo market as of 2026. Duct Cleaning Mission Viejo offers free estimates – call (833) 593-4407.
What Our Customers Say
"Job was done well and the house smells better. There was some dust knocked loose around a couple of the registers that I had to wipe down afterward."
- Jennifer Delaney"Ran a negative air machine on the whole system rather than the shop vac on a stick that the cheap outfit down the road uses. Showed me the before and after photos from inside the trunk line and it was genuinely disgusting."
- Renee Padgett"Quoted per system rather than the bait and switch per vent pricing everybody else in town uses. The number I was told on the phone was the number on the invoice."
- Ruben Guzman