Whole-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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AfterHow Much Does Duct Repair & Sealing Cost in Palo Alto?
Duct repair and sealing in Palo Alto typically runs $350 to $1,200 for most single-family homes, with whole-house duct replacement landing between $2,500 and $6,500 when the system is beyond patching. A single disconnected joint or a few leaking seams to seal usually comes in under $500. Larger homes in Old Palo Alto and Crescent Park, or anything with original 1950s-era ductwork, tend to sit at the higher end because the runs are longer and the access is tighter.
The number you get depends on how much of the system is accessible, how many leaks or breaks we find, and whether the ducts are standard sheet metal or older flex and rigid combinations. We give free on-site estimates, so the range above is a starting point, not a bill.
Key Takeaways
- Most duct repair and sealing jobs in Palo Alto cost $350 to $1,200.
- Sealing a small number of leaks generally costs $350 to $600.
- Full duct replacement runs $2,500 to $6,500 depending on size and material.
- Palo Alto’s older housing stock and seasonal temperature swings make duct condition a real energy-cost issue, not just an air-quality one.
- We handle Duct Repair & Sealing in Palo Alto as a standalone service, whether or not you also get cleaning.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what the individual pieces of a duct repair and sealing job cost in the Palo Alto market. Most homes need a combination of two or three of these, which is why the total ranges span what they do.
| Service | Typical 2026 Price Range | Notes |
|---|---|---|
| Leak sealing (mastic + mesh) | $350 – $600 | Best for accessible seams and small gaps; per-leak and per-run pricing. |
| Section replacement (single run) | $600 – $1,200 | Replace a crushed, torn, or disconnected section of flex or sheet metal. |
| Whole-house duct sealing | $900 – $1,800 | Covers every reachable leak across the system; most thorough seal job. |
| Reconnect / re-hang sagging ducts | $400 – $900 | Common in older crawlspace and attic runs where hangers have failed. |
| Insulation wrap or re-wrap on repaired runs | $300 – $700 | Re-insulating repaired sections is often necessary for homes here. |
| Full duct replacement (whole house) | $2,500 – $6,500 | Used when the system is too damaged or brittle to repair safely. |
| Flex-duct upgrade (whole house) | $3,000 – $7,000 | Runs longer in larger Palo Alto homes or when runs are long and complex. |
A few things push the total up or down. Accessibility is the biggest lever: a clean attic run with good clearance is quicker to repair than a crawlspace or a vaulted ceiling that forces us to work around structure. The number of runs matters too. A 1,200-square-foot Eichler with a tight, simple duct layout prices very differently from a 3,000-square-foot two-story in Professorville. Material choice factors in as well: sheet metal lasts decades but costs more to fabricate and fit than flex, while flex is faster to install and common in retrofits. Finally, whether we’re sealing around a leak or replacing a section outright changes the labor line significantly.
What Affects Duct Repair & Sealing Pricing in Palo Alto
Pricing isn’t a flat rate per house. Here are the six factors that move the number most in this market.
- Housing age and duct vintage. Much of Palo Alto was built between the 1950s and 1970s, and original ductwork from that era has often been patched multiple times. Duct runs from that period frequently have disconnected joints and torn flex, which takes more labor to sort out than newer systems. Homes around Midtown and College Terrace in particular show these patterns often.
- Accessibility of runs. Ducts in attics and crawlspaces up here are typically harder to reach than in newer construction, especially under low sloped roofs or in homes with limited attic clearance. That’s labor, and labor is the largest share of most repair bills.
- Number of leaks or damaged sections. A handful of seams and one disconnected joint is one price. Twelve leaks across twenty feet of flex is another. We inspect first and give you a count before we quote.
- Sealing method. Mastic and mesh sealing at accessible seams is the standard approach. Sealing at junctions where ducts pass through walls or framing can require extra steps for a clean, long-lasting result.
- Insulation condition. Repaired runs usually need re-wrapping, and homes in Palo Alto where duct insulation has degraded over years of hot summers and cool winters benefit from fresh wrap. That’s an added line, not a coating over the repair.
- Whether you combine repair with cleaning. A combined cleaning-plus-repair visit on a system with real debris buildup is usually more efficient than two separate appointments. We’re set up to do both in one visit using our Air Duct Cleaning Palo Alto service and our Rotobrush and Nikro HEPA setup.
How to Save on Duct Repair & Sealing
There’s no discount trick that beats fixing the actual problem the first time. That said, a few things consistently keep the bill lower.
- Get the free estimate before you commit. Call (833) 620-7085 and we’ll inspect the system on site at no charge. A quote based on actual measurements always beats a guess, and we’ll tell you if a repair you were expecting isn’t necessary.
- Address small leaks early. A sealed seam today prevents the crushed and disconnected section you’d pay to replace in two years. Small seal jobs run $350 to $600; replacement of that same run runs two to three times more.
- Bundle repair with cleaning. If the ducts haven’t been cleaned in years, doing both in one visit saves a trip charge and lets us seal freshly cleaned ducts rather than sealing over debris. Our dryer vent cleaning in Palo Alto can also be handled on the same day if the vent is due.
- Know when to replace instead of repair. If more than half the runs are compromised or the duct material is brittle and failing at the joints, patching becomes a false economy. We’ll give you both numbers and let you compare.
- Ask about upgrading filtration at the same time. We install and service Honeywell and Aprilaire filtration products. If you’re already having work done, adding a proper filter at the air handler addresses the source of air quality issues rather than chasing them downstream.
Why Equipment Matters for Duct Repair in Palo Alto
Repair and sealing sound simple. Cut out the bad run, seal the seams, wrap it back up. The difference between a repair that lasts and one that fails in a year comes down to what’s happening inside the duct and around the work zone while it’s open. That’s where the gear matters more than most homeowners expect.
We work with professional-grade equipment throughout the process. Our Rotobrush brush-contact system removes compacted debris other methods leave behind, so we’re sealing clean ductwork instead of locking in whatever was coating the inside. Our Nikro HEPA negative-air machines run during the work to capture particulates and keep them out of your living space, which is the standard for containment in abatement work, not a step most duct companies bother with. And we use Abatement Technologies and Guardsman products in the workflow for containment and protection, which is the level of care associated with professional remediation.
For homes with allergy sufferers, infants, elderly residents, or genuinely aging ductwork, that gear isn’t a luxury line item. It’s the reason the ducts come out of the job actually clean and the air you breathe afterward reflects the repair. Repairing a system that then blows twenty-year-old dust through the house is only half a job. We handle the air duct cleaning in Palo Alto side of it with the same equipment, so the finished system is clean from the inside.
And because we offer repair as a standalone service, not as a follow-on to a cleaning you didn’t ask for, you can call us for a repair-only visit and know we’ll do it without pressuring you into the full package. That’s the air duct repair service line we run in Palo Alto.
Is It Cheaper to Repair or Replace Ductwork?
Repair is cheaper in the short term, usually by several thousand dollars, but replacement is the better value once the system is past a certain point of failure. A single damaged section on otherwise sound ductwork should be repaired; a system where most runs are compromised, brittle, or failing at the joints should be replaced. In Palo Alto, homes built before roughly 1975 often cross that line. If the ducts have already been patched repeatedly and the material itself is degrading, patching again buys you months, not years. We’ll tell you honestly which side of that line your system sits on when we inspect it.
Does Duct Sealing Actually Lower Energy Bills in Palo Alto?
Yes, and the effect is measurable in this climate. Palo Alto homes see meaningful swings between hot summers and cool winters, so a system leaking conditioned air through disconnected joints and unsealed seams loses both cool air in July and warm air in January. Sealed ducts deliver a larger share of the air you’re paying to condition to the rooms you actually use. The savings depend on how leaky the system was to begin with; a badly leaking system sees a bigger drop than one with only a few small seams. We don’t promise a specific percentage, but we do seal every reachable leak on the system when we quote a full seal job, not just the obvious ones.
Can You Repair Ducts the Same Day You Estimate?
Often, yes, for straightforward repairs. A single section replacement, a reconnected joint, or a small seal job can usually be handled the same visit or the next business day. Larger jobs and full replacements get scheduled, both because they take longer and because we want to inspect the entire system before setting the final scope. Call (833) 620-7085 and we’ll tell you what’s realistic for your home when you book the estimate. Crawlspace-heavy jobs sometimes need two visits just for access. Free estimates, upfront pricing before any work starts.
What’s the Difference Between Duct Repair and Duct Sealing?
Sealing fills leaks in ductwork that’s otherwise intact. Repair fixes ducts that are actively failing: crushed, torn, disconnected, or sagging runs. Sealing typically costs $350 to $600; a repair on a single damaged run runs $600 to $1,200 because it involves cutting out and replacing the failed section. Most older Palo Alto homes need some of each. We inspect the full system and tell you where each applies rather than quoting one blanket service.
FAQs – Duct Repair & Sealing Cost
How much does duct repair and sealing cost in Palo Alto in 2026?
Most duct repair and sealing jobs in Palo Alto cost between $350 and $1,200, with whole-house sealing at $900 to $1,800 and full duct replacement at $2,500 to $6,500. The low end covers small seal jobs on a handful of seams; the high end reflects larger homes with older ductwork and multiple damaged runs. Call (833) 620-7085 for an exact quote – estimates are free.
Is it cheaper to repair or replace ductwork in Palo Alto?
Repair is almost always cheaper up front, typically saving several thousand dollars over replacement. But replacement wins once more than half the runs are compromised or the duct material has become brittle and fails at the joints, which is common in pre-1975 homes here. Replace at $2,500 to $6,500 when repair would only be a temporary patch. Call (833) 620-7085 and we’ll tell you which path makes sense for your system.
Why does duct repair cost more in some Palo Alto homes than others?
Accessibility is the main reason. Ducts in low-clearance attics and tight crawlspaces take more labor to reach, and labor is the largest share of the bill. Housing age matters too: original 1950s and 1960s duct runs in older Palo Alto neighborhoods often need more section replacement than newer construction. Expect the mid-to-high end of the range, $700 to $1,200, in homes with those conditions. Call (833) 620-7085 for a free on-site inspection.
Can I just seal the ducts myself and skip the repair cost?
No, not for actual damage. Sealing tape and mastic on an accessible seam is one thing, but disconnected, crushed, or sagging runs need to be physically repaired, and sealing over a broken joint won’t hold. Ductwork in attics and crawlspaces also involves working around HVAC components that aren’t a DIY-safe surface to touch. Sealing is a genuine repair service that costs $350 to $600 when we do it properly across the system. Call (833) 620-7085 for an estimate instead of a temporary fix.
Will duct sealing save me money on my energy bills in Palo Alto?
Yes, meaningfully, especially if the system was leaking badly. Sealing returns conditioned air to the rooms you’re paying to heat and cool instead of losing it to attics and crawlspaces. Homeowners with badly leaking systems see the biggest difference. We seal every reachable leak when we quote a full job, so you get the full benefit. Call (833) 620-7085 for a free estimate and we’ll show you what needs sealing.
Get a Free Duct Repair & Sealing Estimate in Palo Alto
If you’ve noticed rooms that don’t heat or cool evenly, dust that keeps returning after cleaning, or higher energy bills than this time last year, the ducts are worth a look. We serve homeowners, landlords, and property managers across Palo Alto – from Old Palo Alto to Midtown to the neighborhoods near Stanford – with repairs, sealing, and cleaning done on professional-grade equipment. Our Rotobrush and Nikro HEPA systems and Abatement Technologies containment mean the job is done properly, and our Honeywell and Aprilaire filtration work solves air quality at the source. No subcontracting, no referrals out.
Call (833) 620-7085 for a free estimate. We’ll inspect the full system, walk you through what we find, and give you upfront pricing before any work begins. Licensed, insured, and set up to handle repair-only jobs if that’s what your home needs.
Pricing reflects the Palo Alto market as of 2026. Air Duct Cleaning Palo Alto offers free estimates – call (833) 620-7085.
What Our Customers Say
"Found a disconnected run in the crawlspace while they were in there and told me about it rather than cleaning around it."
- Carlos Ramirez"Honest people. That's getting rare."
- Scott Rhodes"Our tenant called us in a panic on a Friday afternoon, which is the worst possible timing for a property 200 miles away. I called these guys at four, they were on site by six, and they sent me photos and a written summary the same night so I could approve the work without driving down. Tenant said the technician was polite and cleaned up. Invoice came in slightly under the estimate. I have now made them our default for anything in that area."
- Tim Miller