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
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Before
After
Before
After
Before
AfterHow Much Does Duct Repair & Sealing Cost in Rancho Park?
Duct repair and sealing in Rancho Park typically runs $285 to $650 for most single-family homes, with small single-leak repairs on the low end and whole-system sealing jobs on the high end. Full attic duct replacement in a larger Westside house can reach $2,800 to $5,500 when multiple runs have collapsed or come apart at the joints. Most of the repair work we do here lands in the $300 to $550 range and is finished in a single visit.
Rancho Park is a specific kind of market. The housing stock is mostly 1940s to 1960s single-story homes with original or second-generation ductwork, and the marine layer keeps attic humidity higher than inland buyers expect. That combination is hard on flex duct, taped joints, and metal collar connections. If your ducts are 20 or more years old, the price you’re quoted should reflect real conditions in the attic, not a flat rate pulled from a chart.
Key Takeaways
- Most repairs: $285 – $650. Whole-system sealing: $600 – $1,200. Duct replacement: $2,800 – $5,500.
- Free estimates are standard here. Call (855) 974-1911 and we’ll give you a line-item quote, not a ballpark.
- Judgment call on repair versus replace: at roughly 40% of replacement cost, repair usually wins. Above that, replacement starts to make more sense.
- We use Rotobrush and Nikro equipment and Abatement Technologies containment on every job, because sealing a dirty system just traps the dirt.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s how the pricing actually breaks down for a typical Rancho Park home in 2026. Ranges are for labor and materials together, and they assume a standard forced-air system.
| Service | Typical Cost (Rancho Park) | What It Covers |
|---|---|---|
| Single leak or joint repair | $285 – $450 | One or two failed connections, re-taped and re-sealed at the collar |
| Multiple leaks / partial run repair | $450 – $780 | Several failed joints, a crushed or disconnected flex section, mastic and foil-tape rebuild |
| Whole-system sealing (mastic + mesh) | $600 – $1,200 | Every accessible joint, boot, and plenum seal at the air handler |
| Duct cleaning before sealing | $350 – $700 | Full system cleaning with Rotobrush and Nikro equipment, containment set up first |
| Individual duct run replacement | $180 – $400 per run | New flex or rigid run installed from plenum to register |
| Full attic duct replacement | $2,800 – $5,500 | Entire system replaced, including boots, plenum connection, and sealing |
| Return plenum rebuild | $400 – $900 | Panned joist or failing return rebuilt with sealed sheet metal or duct board |
| Post-repair duct cleaning + sanitation | $400 – $750 | Clean and sanitize after repair work disturbs dust in the system |
What pushes the price up in Rancho Park specifically: attic access. Older homes off Manning Avenue and along Patricia Avenue often have low-pitch roofs and cramped attics, which slows the work and forces us to use shorter flex runs and more careful routing. What brings it down: catching leaks early, sealing during a cleaning visit while the system is already open, and having a system that was installed with accessible plenums. If you want the full picture of what repair and sealing involves beyond price, our Duct Repair & Sealing in Rancho Park service covers the process step by step.
What Affects Duct Repair & Sealing Pricing in Rancho Park
Six factors move the number more than anything else. None of them are guesses, and all of them are things we check on the estimate walk-through.
- Number of failed joints. One disconnected run is a quick fix. Six failed joints across 60 feet of flex duct is a different job. Each additional leak adds labor and material, and most homes we open in Rancho Park have three or more.
- Attic accessibility and roof pitch. Homes built in the 1950s around Overland Avenue and Ashby Avenue frequently have attics with less than four feet of clearance and blown-in insulation that needs to be moved and restored. Low-clearance work takes longer, and that’s reflected in the quote.
- Duct material. Flex duct fails at the joints and sags when it’s under-supported. Rigid metal runs last longer but cost more to repair and seal. If your attic has a mix of both, we price each run separately.
- Marine layer humidity and attic condensation. The Westside’s coastal humidity accelerates degradation of duct tape and flex duct jackets. Homes closer to the ocean, like those near Pico Boulevard heading west, tend to show more taped-joint failures than inland homes. We use mastic and mesh reinforced sealing rather than tape alone for exactly this reason.
- Repair scope: clean, seal, or replace. A repair-and-seal job is meaningfully cheaper than replacement. Sealing alone, without cleaning, is a mistake we won’t make on a dirty system, and cleaning added to the job changes the total.
- Permit and code considerations. Duct sealing itself generally doesn’t require a permit in Los Angeles, but if we’re rebuilding a return plenum or replacing duct runs that connect to gas appliances, we work within current mechanical code and Title 24 requirements for duct sealing. That adds inspection-level care to the job, and it’s not something a handyman-quote price accounts for.
How to Save on Duct Repair & Sealing
There’s real money in these decisions, and most of it comes down to timing and scope. A few practical moves:
- Fix leaks before they become full failures. A $285 single-leak repair becomes a $600 partial-run job once the flex duct collapses. In Rancho Park we regularly see this play out on 1950s homes during the first hot week of summer, when the system runs hard and a tired joint finally lets go.
- Bundle sealing with a cleaning visit. When the system is already open and containment is already set up, adding sealing carries less labor. We price it that way.
- Get a written line-item estimate, not a lump sum. A quote that lists each leak and each run tells you exactly what you’re paying for and lets you decide which repairs to prioritize. Call (855) 974-1911 for a free estimate.
- Ask about repair vs. replace honestly. If a system needs more than about 40% of replacement cost in repairs, replacement is usually the better long-term decision. We’ll tell you when that’s true.
- Don’t skip the cleaning. Sealing over debris traps dust and allergens inside the system. If your ducts haven’t been serviced in years, cleaning first extends the life of the repair and keeps the air in your home cleaner.
If you want a broader view of what cleaning alone costs, our air duct cleaning service in Rancho Park page covers it, and the air duct cleaning cost guide breaks down those numbers in detail.
Repair or Replace? The Math We Use
The rule of thumb: if repair and sealing costs more than 40% of what replacement would run, replacement usually makes more sense. For a 15-run attic system at $4,200 replacement, that’s about $1,680. A $600 sealing job is clearly worth doing. A $2,000 repair on a system that’s already 25 years old is money spent on ductwork that’s already near the end.
That said, duct material and installation quality matter more than age alone. Rigid metal duct from the 1970s can outlast flex duct installed in 2005. We look at the condition of the ducts, not just the date on the house. The ducted vs. ductless comparison is worth reading if you’re already weighing a bigger change.
Why We Seal Ducts Differently
Two things separate a repair that lasts from one that fails again in a year: what you use to seal, and what state the system is in when you seal it.
We clean the system first using Rotobrush and Nikro duct cleaning equipment, the same professional-grade systems remediation contractors rely on. Then we set up Abatement Technologies containment and negative-air equipment so that dust and contaminants don’t spread through the house while we work. Only then do we seal with mastic and mesh, not tape alone. Guardsman-level surface protection is standard on every visit. It’s not glamorous work, but it’s the difference between a repair that holds through a few Westside damp seasons and one that peels off by August.
We don’t install HVAC systems, fix furnaces, or handle mold remediation. We clean ducts, we clean dryer vents, and we repair ducts. That focus is the reason we can give you an accurate number on the phone rather than a wide range that doubles once we’re in the attic. If you’re in the neighborhood, the West Los Angeles air duct cleaning page and the Cheviot Hills service area page cover nearby markets, and the Santa Monica page and Culver City page explain how pricing shifts block by block.
For a full picture of how we handle dryer vent work separately, the dryer vent cleaning page covers it, and the dryer vent cleaning cost guide explains how that pricing compares. If you’re dealing with persistent dust or suspect your ducts haven’t been touched in decades, the complete air duct cleaning guide answers the questions we hear most. Homeowners near the Westfield Century City side of the neighborhood should also see the Century City guide, and the Beverly Hills service page if you’re just over the line to the east.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in Rancho Park?
Most duct repair jobs in Rancho Park run $285 to $650, with whole-system sealing at $600 to $1,200 and full attic duct replacement at $2,800 to $5,500. The total depends on how many joints have failed and how accessible your attic is. Call (855) 974-1911 for an exact quote – estimates are free.
Is it cheaper to repair or replace ducts in Rancho Park?
Repair is almost always cheaper than replacement, and usually the right call when the cost comes in under about 40% of replacement. A $500 sealing job on a 15-run system that would cost $4,200 to replace is worth doing. Above that 40% line, replacement usually wins. Call (855) 974-1911 and we’ll give you an honest number, not a push.
Can you seal duct leaks without cleaning the ducts first?
You shouldn’t, and we won’t. Sealing over dust and debris traps contaminants inside the system, and they get pushed into your living space every time the air handler runs. Cleaning first using Rotobrush and Nikro equipment, then sealing, is the only sequence that holds up. Cleaning adds $350 to $700 to the total, but it’s what makes the repair last. Call (855) 974-1911 for a combined quote.
Can duct repair and sealing be done in one day?
Most duct repair and sealing jobs in Rancho Park are finished in a single day, typically 3 to 6 hours for sealing work on an accessible system. Jobs that involve cleaning first, or full-run replacement, usually run into a second visit. Call (855) 974-1911 and we can tell you on the estimate whether your job fits in one day.
Why do ducts in Rancho Park fail faster than in other parts of LA?
The marine layer and coastal humidity on the Westside accelerate deterioration of duct tape and flex duct jackets, and the 1940s-1960s housing stock here often still has original or second-generation ductwork in low-clearance attics. We regularly see taped joints failing on homes near the ocean side of the neighborhood that would still be holding up in the Valley. Mastic and mesh sealing holds up far better in these conditions. Call (855) 974-1911 for an assessment of your system.
Do I need to be home during the duct repair?
Yes, we ask that you’re home for the start of the visit so we can walk the attic access and confirm the scope before work begins. You don’t need to stay the whole time, but the initial walk-through matters. Call (855) 974-1911 to schedule.
Ready to find out what your ducts need? Call (855) 974-1911 for a free estimate on duct repair and sealing in Rancho Park. We’ll walk your attic, give you a line-item quote, and tell you honestly whether repair or replacement is the smarter spend. No upsells, no vague numbers, and no seal-over-dirt shortcuts.
Pricing reflects the Rancho Park market as of 2026. Air Duct Cleaning Rancho Park offers free estimates – call (855) 974-1911.
What Our Customers Say
"Fair price and thorough work. They ran about an hour and a half past the estimated finish time, so don't schedule anything tight after."
- Eduardo Delgado"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."
- Veronica Hernandez"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."
- Brian Novak