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
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Before
AfterHow Much Does Duct Repair & Sealing Cost in San Leandro?
Duct repair and sealing in San Leandro typically runs $350 to $1,500 for most homes, with small leaks and single-joint seals at the low end and larger disconnected-run repairs or full-house sealing at the high end. Larger homes with attic and crawlspace runs, or systems that have never been sealed, sit closer to $1,800 to $2,600. We give you a written estimate before any work starts, so the price you see is the price you pay.
What separates a real repair quote from a guess is knowing what’s actually failed. A duct run with a gap at a boot collar looks like a small fix until you find three more joints leaking and a crushed flex line feeding a back bedroom. That’s why we inspect first, then price the work. Call (855) 356-5880 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Duct Repair & Sealing Cost Breakdown (2026)
These are typical estimated ranges for the San Leandro market in 2026. Every job gets its own written estimate, and that document sets the final price. Your exact number depends on how much ductwork is accessible, how bad the leaks are, and whether we’re repairing or sealing.
| Service | Typical Estimated Range |
|---|---|
| Single leak or joint seal (one accessible spot) | $150 – $350 |
| Reconnect a disconnected duct run | $250 – $550 |
| Replace a section of damaged flex duct | $300 – $700 |
| Seal all accessible joints on a typical system | $600 – $1,400 |
| Boot and register collar sealing | $200 – $450 |
| Repair plus full air duct cleaning (bundled visit) | $800 – $2,000 |
| Rotted or crushed rigid trunk line repair | $700 – $1,800 |
| Full-house duct sealing with access work (attic/crawlspace) | $1,200 – $2,600 |
Two things push a quote toward the high end in San Leandro: access and system age. A lot of the housing stock near downtown and along Bancroft Avenue was built in the mid-20th century, and the ductwork in those homes has often been patched at least once, sometimes with tape that has long since failed. Older systems with crushed flex runs or disconnected joints need more labor than a newer install with clean access. Attic runs are workable here, but a low clearance or a tangle of existing repairs slows everything down. Crawlspace work is drier than you’d expect most of the year, which helps, though we still see rodent damage and sagging runs in older crawlspaces.
What keeps a quote at the low end is straightforward access and a small number of problem spots. If your ducts run through an open attic with good headroom and the leaks are concentrated near the air handler, the repair is quick and the price reflects that.
What Affects Duct Repair & Sealing Pricing in San Leandro
Local conditions shape the number more than most homeowners expect. Here’s what moves it.
- Access to the duct runs. An attic with a wide access panel and clear walkway is faster to work in than a tight crawlspace or a ceiling chase hidden behind drywall. Time is the biggest cost driver in this trade, and access is where time goes.
- Number and type of failures. Sealing a few loose joints is a different job from replacing crushed flex duct or repairing a rotted trunk line. We count and price each problem area.
- How far the leak is from the air handler. A joint near the unit in an accessible spot is easy. The same leak feeding a bedroom on the far side of the house may require more duct to reach, or more sealing to get the pressure back.
- Whether the ducts also need cleaning. Sealing over a dirty system seals debris inside it. If the ducts are heavily soiled, cleaning first is the correct order and changes the total for the visit.
- System condition and material. Flex duct, rigid sheet metal, and ductboard each fail differently and repair differently. Older rigid systems sometimes need sheet metal work, and ductboard systems near the coast (all of San Leandro, really) can show moisture damage.
- Existing air quality equipment. Homes with Honeywell or Aprilaire whole-home equipment need the sealing work done in a way that doesn’t bypass or compromise the filtration and humidification setup. We know those systems, and we work with them.
- Contamination level. Mold-adjacent or post-renovation debris in a duct system calls for our Abatement Technologies air-scrubbing gear, not a standard pass. Higher-contamination scenarios take longer and cost more.
How to Save on Duct Repair & Sealing
There’s no coupon for contractor time, but there are real ways to keep the bill reasonable.
- Bundle the work on one visit. Repairing and cleaning in a single trip costs less than two separate visits, because you’re not paying for a second setup and a second trip to your house. We’re built to do both, so this is a natural fit.
- Get the estimate before you commit. The estimate is free and itemized. Knowing exactly which joints are being sealed and which runs are being replaced lets you compare quotes fairly.
- Fix the easy stuff now, not later. A small leak sealed today stays a small leak. Neglected, it can wet the surrounding building materials in a crawlspace or attic over time, and moisture-driven damage gets expensive fast.
- Include the dryer vent if it’s overdue. Dryer vent cleaning is a fire-safety service, not an upsell, and it’s often the cheapest thing on the list. The National Fire Protection Association flags the dryer vent as a leading fire-hazard point in the home, and we treat it that way.
- Don’t tighten the whole house if the damage is localized. A good contractor will tell you when a full-house seal is overkill and a targeted repair solves it. We price per job, and the estimate reflects what the system actually needs.
If you’re comparing this against a full cleaning quote, the baseline for a standard Duct Cleaning San Leandro visit is worth knowing before you start adding items.
What Equipment Does a Duct Repair and Sealing Job Need?
The equipment matters, and not in the vague way that “state-of-the-art” suggests. A proper duct job uses a rotary brush system like Rotobrush to clear the ducts, a HEPA vacuum rig like Nikro to contain what comes out, and a sealing approach matched to the failure type. For higher-contamination work, mold-adjacent or post-renovation debris, our Abatement Technologies air-scrubbing units go in first. That’s the same tier of equipment used on commercial contracts.
We don’t show up with a shop vac and a flashlight. We show up with Rotobrush and Nikro rigs, and the ability to repair what the cleaning turns up. Most duct cleaners clean and leave; if they find a disconnected run, they tell you to call a separate contractor. We clean it and fix it on the same visit, which is the reason many homeowners near Washington Avenue and Dutton Avenue call us in the first place.
Do Ducts Really Need Sealing in San Leandro’s Climate?
Yes. San Leandro’s mild, dry summers and wet winters still put real stress on ductwork, because the ducts sit in attics and crawlspaces where temperature swings and winter moisture slowly degrade the materials. The bigger issue in older homes is simply age. Ducts that were sealed with tape decades ago have failed, joints have separated at the plenum, and boot collars at the registers have pulled loose. None of that shows up as dramatic damage. It shows up as rooms that never feel right and an energy bill that keeps climbing.
Here’s the part that matters most: your ducts carry every breath your family takes indoors. A leaking return line in an attic can pull in dust, insulation fibers, and whatever the attic itself holds. Sealing the duct system is partly an efficiency fix and partly an indoor air quality fix. That’s the framing we use with property managers in San Leandro, and it’s the framing that holds up.
How Do We Find the Leaks Before We Quote?
We inspect the accessible duct system, check the joints, boot collars, and connections at the air handler, and look for visible gaps, disconnected flex, and collapsed or crushed runs. If the ducts are dirty enough to obscure the condition, a cleaning pass with Rotobrush and Nikro equipment is the first step. The estimate comes after the inspection, not before it. That’s why our numbers tend to hold. If you want to know what a cleaning alone costs before repairs are added, the cleaning service details are worth a look first.
For higher-contamination situations, Abatement Technologies equipment lets us work safely in spaces most cleaners won’t enter. We’d rather see the problem clearly and price it honestly than guess and adjust later.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in San Leandro?
Most San Leandro homes land between $600 and $1,400 for sealing all accessible joints on a typical system, with larger or harder-to-access homes running $1,200 to $2,600. Small single-leak seals run $150 to $350. The written estimate fixes the final price. Call (855) 356-5880 for an exact quote, and the estimate is free.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper than replacement for localized damage, and most jobs we see fall in the $250 to $1,800 range. Full replacement of a duct system is a bigger project and isn’t something we scope without an inspection. If the damage is confined to a few runs or joints, repair and seal is the right call.
Can you repair and clean my ducts on the same visit?
Yes. That’s the whole point of calling us rather than a cleaner who only cleans. Sealing over a dirty system traps debris inside, so when cleaning and repair are both needed, we do them together in one dispatch. Bundled visits generally run $800 to $2,000 for a typical home.
Do you offer same-day duct repair in San Leandro?
Same-day repair is often possible when the work is accessible and dispatch has room. Call (855) 356-5880 to check. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. A call outside dispatch hours is booked into the next opening, Sunday through Friday, 7am to 7pm.
Why do so many duct jobs cost more on the final invoice from other companies?
Usually because the initial quote was a phone estimate, not an inspection. Access problems, crushed flex, and unexpected contamination all add labor that a phone quote can’t see. Our free estimate is written after we’ve looked at the system, so the number on the estimate is the number on the invoice.
What Happens When You Call
You describe what’s going on. We ask a few questions about the system and the symptoms, and we set up a free estimate. A technician inspects the accessible ductwork, identifies the leaks and failures, and writes up the scope and price. From there, you decide. If it’s a go, we schedule the work, and on larger jobs the cleaning and repair happen on the same visit. If your ductwork needs both cleaning and repair, duct cleaning San Leandro and sealing are handled by the same crew.
One word on safety: we don’t recommend digging into duct systems yourself. Attic and crawlspace ductwork sits near electrical runs and gas lines, and a wrong pull on a joint can disconnect a run you can’t see. A trained technician handles this work correctly and safely, and it’s the reason we inspect before we quote.
Ready for a number? Call (855) 356-5880 for a free estimate on duct repair and sealing in San Leandro. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday, and we’re closed Saturday. We show up with Rotobrush and Nikro rigs, not a shop vac and a flashlight. One visit. Clean ducts, sealed repairs, safer dryer vent.
Pricing reflects the San Leandro market as of 2026. Duct Cleaning San Leandro offers free estimates – call (855) 356-5880.
Written by the team at Duct Cleaning San Leandro, serving San Leandro since 2018.
What Our Customers Say
"Told me straight that our ducts were in decent shape and didn't need doing every year like the mailer companies claim."
- Divya Singh"My wife's allergies had been bad in this house since we moved in. It's been two months since they did the ducts and it's noticeably better. Not a miracle, but real."
- Brian Parker"I'd use them again. Not the cheapest option in San Leandro and the first appointment got pushed by a day, but the work was clean and they stood behind it."
- Neil Fletcher