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 Northridge?
Duct repair and sealing in Northridge typically runs $350 to $1,500 for most homes, with a single disconnected joint or small leak repaired for around $180 to $400 and a full-home duct sealing job landing near $1,100 to $2,400. The wide spread comes down to how much ductwork is accessible, how many leaks or breaks we find, and whether the job is a spot fix or a system-wide seal. Most Northridge homes we inspect fall in the $450 to $1,200 range once we’ve sealed every gap that’s dragging down airflow and pulling attic dust into your living space.
Call (833) 968-4871 for a free estimate. We clean, repair, and seal in one visit using professional-grade equipment, not improvised tools, so you get a verifiable fix instead of a temporary patch.
Key Takeaways
- A single duct joint repair in Northridge usually costs $180 to $400.
- Full-home duct sealing averages $1,100 to $2,400 depending on the number of accessible leaks.
- Reconnecting a detached return or supply run runs $250 to $600.
- Combining cleaning with repair typically saves $100 to $250 versus booking each separately.
- Diagnostics and a camera inspection generally run $75 to $150, often credited toward the repair.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what the line items look like for the Northridge market heading into 2026. These are real ranges for the work, not vague ballparks, so you can compare quotes with confidence.
| Service | Typical Cost Range |
|---|---|
| Diagnostic inspection and camera scope | $75 – $150 |
| Single duct joint repair or reseal | $180 – $400 |
| Reconnect disconnected supply or return run | $250 – $600 |
| Repair of crushed or damaged flexible duct | $200 – $500 per section |
| Whole-home duct sealing (accessible ductwork) | $1,100 – $2,400 |
| Sealing plus duct cleaning combined | $1,300 – $2,700 |
| Rerouting or extending a duct run | $400 – $900 |
| Mastic and foil-tape sealing per joint | $25 – $75 |
What pushes a quote up? More leaks means more labor. Ducts buried behind drywall, in a tight attic, or under the slab cost more to reach. In Northridge, many homes built in the 1950s through the 1970s around Reseda Boulevard and the older stretches near California State University Northridge still have original rigid metal ductwork with taped seams that have dried out and failed. That tape fails predictably after decades of heat cycling, so a “quick reseal” turns into a multi-joint job. Newer construction out toward Porter Ranch and the North Hills side is more often flexible duct work, which is easier to access but can be crushed or kinked at tight turns and needs replacement rather than a patch.
What brings a quote down? More accessible ductwork, fewer failed joints, and combining repair with cleaning so the technician’s already on site. A single obvious leak in an open attic is the best-case scenario. A home full of hidden gaps is the worst. Either way, we match the equipment to the job: Rotobrush brush-fed cleaning, Nikro HEPA-rated extraction, and Abatement Technologies negative-air containment so debris stays contained while we work.
What Affects Duct Repair & Sealing Pricing in Northridge
Six factors move the number more than anything else. If you understand these before you call, you’ll know why one quote is $300 and another is $1,800.
- Number and location of leaks. A single loose joint is a small job. Ten failed seams across the system is not. The more inaccessible the leak (crawlspace, chase, behind a soffit), the more labor it takes to reach and seal it properly.
- Duct material and age. Older rigid galvanized ductwork common in mid-century Northridge homes develops loose joints and failing tape. Flexible duct from newer builds can tear, sag, or crush. Each material needs a different repair method and sealant.
- Access and layout. A rambling single-story ranch with a low attic is faster to work in than a two-story with a tight chase. Northridge’s ranch-style inventory generally helps here, but split-level and two-story homes cost more because access is slower.
- Whether you combine with cleaning. Sealing an already-dusty duct system traps contaminants. Combining cleaning and sealing in one visit is the right order and typically saves $100 to $250 against booking them separately.
- Sealant method. Mastic plus foil tape at each joint is the standard. Aeroseal-style internal sealing, when appropriate, adds cost but reaches leaks you can’t get to by hand.
- Local climate and pest pressure. Northridge summers push attic temperatures well past 130°F, which dries out tape and degrades sealant faster than in cooler markets. Rodent activity in attic duct runs is also common in the area, and gnawed flex duct gets replaced, not patched.
Our Duct Repair & Sealing in Northridge service covers each of these conditions in detail and what a proper repair looks like for each. If you’re starting from scratch on your whole system’s health, it’s also worth understanding how cleaning, repair, and sealing fit together before you book anything. Reading our duct cleaning overview for the area is a reasonable place to start.
How to Save on Duct Repair & Sealing
You can’t avoid a real repair, but you can avoid paying twice for the same job. Here’s what actually works.
- Book cleaning and sealing together. Combining the two in one engagement is cheaper than two separate visits, and the sequence is correct: clean first, then seal. Ask for both in a single quote.
- Get the inspection credited. Many companies apply the diagnostic fee toward the repair. Ask up front so you know whether a $100 camera inspection is a throwaway cost or a credit.
- Fix the obvious leaks now, plan the rest. If your budget only covers a spot repair this month, seal the biggest gap that’s hurting airflow and schedule the full seal later. Don’t let it slide through a Northridge summer, when attic heat accelerates sealant failure.
- Don’t skip the repair and just clean. Cleaning a system with visible leaks means you’ll be recleaning it soon. The leak lets attic dust and outdoor air straight back in. Repair first, clean second, seal third is the lower-cost path over time.
- Ask what equipment is used. A quote built around a shop vac and a roll of duct tape is not a durable repair. We bring Rotobrush, Nikro, and Abatement Technologies systems because the right tool for the job is the one that holds up. If a quote is dramatically cheaper than the rest, ask what equipment is on the truck.
We offer free estimates on duct repair and sealing, so there’s no cost to get a real number and a clear scope before you decide. Call (833) 968-4871 to book one.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Northridge?
Full-home duct sealing in Northridge typically costs $1,100 to $2,400, depending on the number of accessible leaks and the condition of your ductwork. A single-joint reseal is far less, usually $180 to $400. Call (833) 968-4871 for a free estimate that reflects your actual system, not a phone-quote range.
Is duct repair worth it, or should I replace the ducts?
For most homes, repair is worth it when the ductwork is structurally sound and only has failed joints, loose seams, or small tears. Repair runs $200 to $600 per major issue, while full duct replacement often runs $2,500 to $6,000 or more. If the ductwork is crushed, badly contaminated, or collapsing, replacement makes more sense than patching. Call (833) 968-4871 and we’ll tell you honestly which side of that line you’re on.
What causes duct leaks in Northridge homes?
The most common culprit here is heat: Northridge attic temperatures routinely exceed 130°F in summer, which dries out the foil tape and mastic on older duct seams and causes them to fail. Rodent activity and shifting foundations in older ranch homes also contribute. Because the same climate stress hits every home, we see seal failures most often in houses built before 1980 that still have original duct tape. Call (833) 968-4871 if you suspect leaks.
Can you combine duct cleaning and sealing in one visit?
Yes, and it’s the right way to do it. Cleaning first clears out the debris, then we seal every leak we found. Combined jobs typically run $1,300 to $2,700 depending on system size and condition, which is usually $100 to $250 less than booking each separately. Call (833) 968-4871 to schedule both in one appointment.
How long does duct repair and sealing take?
A single joint repair takes one to two hours. A full-home sealing job typically takes four to eight hours, depending on the number of leaks and attic access. We use Abatement Technologies negative-air containment during the work so the rest of your home isn’t exposed to dust and debris while we’re sealing. Call (833) 968-4871 to get a time estimate for your system.
Your ducts are part of your home’s health system, not a one-time fix. Keeping them sealed means better airflow, lower energy bills, and cleaner air inside your Northridge house through every summer. If you suspect leaks, crushed runs, or disconnected joints, don’t wait for the problem to grow. Call (833) 968-4871 for a free estimate on duct repair and sealing in Northridge, and we’ll clean, repair, and seal the system properly the first time.
Pricing reflects the Northridge market as of 2026. Air Duct Cleaning Northridge offers free estimates – call (833) 968-4871.
What Our Customers Say
"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Alma Ramirez"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."
- Neil Shah"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Norma Garcia