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.
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AfterHow Much Does Air Duct Cleaning Cost in Seattle?
Our Air Duct Cleaning services in Seattle typically cost $350 to $600 for a standard single-family home with one heating and cooling system, and $650 to $1,100 for larger homes with two systems or heavy buildup. That’s the honest range for a real job done with negative-air equipment and a rotary brush system, not the $99 teaser you’ll see in a coupon mailer. Most Seattle homes we service fall right around $450.
If you’ve been quoted something far below that, the price usually climbs once the technician is inside your house. We put the price in writing before any work starts and it does not move at the door. Call (361) 326-5060 for a free estimate on your specific home.
Key Takeaways
- Seattle single-system homes: $350 – $600. Two-system homes: $650 – $1,100.
- The $99 special usually becomes $600-$900 once “extra” services get added at the door.
- Duct sealing, dryer vent cleaning, and severe mold or rodent contamination add to the base price.
- Every Hollis job gets a written price up front and a 365-Day Done Right Promise covering the work for a full year.
Air Duct Cleaning Cost Breakdown (2026)
Here’s what the line items actually run in the Seattle market this year. These are real ranges from work we and other legitimate crews do around King County, not national averages pulled from a database.
| Service | Typical Seattle Price | Notes |
|---|---|---|
| Standard duct cleaning, 1 system | $350 – $600 | Up to ~12 vents, single furnace or heat pump |
| Standard duct cleaning, 2 systems | $650 – $1,100 | Common in two-story homes and larger ramblers |
| Additional vent beyond 12 | $15 – $30 per vent | Finished basements and bonus rooms add up fast |
| Dryer vent cleaning (add-on) | $125 – $225 | Longer rooftop or second-floor runs cost more |
| Duct sealing (mastic + mesh) | $600 – $1,800 | Depends on how much accessible ductwork you have |
| Furnace and coil cleaning (add-on) | $100 – $200 | Worth doing at the same visit, not separately |
| Severe contamination (mold, rodent, heavy debris) | Add $250 – $700 | Requires extra labor and sometimes sanitizing |
Your house lands somewhere in those ranges based on a handful of things we check on every estimate: the number of systems, the number of accessible vents, how much flex duct versus rigid metal you have, and how bad the buildup is. A 1950s Ballard bungalow with original galvanized ducts looks nothing like a 2015-built house in Sammamish with a sealed system and a heat pump. Both need cleaning at different intervals, and both cost different amounts to do.
We don’t add line items you didn’t approve. If we open a vent and find something the estimate didn’t account for, we stop, show you, and give you a revised written price before we continue.
What Affects Air Duct Cleaning Pricing in Seattle
Six factors move the number more than anything else in this market.
- Number of HVAC systems. A single furnace or heat pump runs the base rate. A second system (common in two-story homes and daylight basements) roughly doubles the labor and equipment time, which is why two-system homes land in the $650 – $1,100 range.
- How many vents you have. Most crews price the first 10 to 12 vents into the base rate, then charge per vent after that. A finished basement, a bonus room over the garage, or an addition from a previous owner can quietly push you to 16 or 18 vents.
- Duct type and accessibility. Rigid metal ductwork is straightforward. Flex duct running through tight crawl spaces – very common in older Seattle homes with post-and-beam foundations – takes longer to reach and clean properly. Rooftop or attic runs in homes with low-slope roofs cost more too, because technicians need to move carefully.
- Condition of the system. In Seattle, we regularly see two patterns: damp buildup in crawl space ducts from our wet winters, and rodent debris in attic runs where the original installers left gaps at the boot. Both require more than a standard pass.
- Time since last cleaning. Ducts that haven’t been touched in 15 or 20 years take longer to bring back. If you’ve never had them cleaned and you’ve owned the house a while, expect to land at the higher end of the range.
- Add-ons you choose. Dryer vent cleaning, furnace and coil cleaning, and duct sealing are separate line items. Doing them at the same visit saves you a second trip charge, which most Seattle companies build into a standalone service call.
One more local factor you won’t read on competitor pages: Seattle’s humidity and our long shoulder seasons mean ductwork sits idle more than it does in, say, Phoenix. That idle time is when dust settles and moisture lingers in crawl space runs. Homes near Green Lake, in parts of West Seattle, and in the Rainier Valley with older foundations tend to show more buildup in spring. Around Bellevue, Redmond, and Kirkland, newer construction with sealed systems often needs less frequent cleaning but more attention to filter changes.
Repair or replace?
If your ducts are leaking badly – usually 20% to 30% of conditioned air lost through unsealed joints – duct sealing at $600 to $1,800 is almost always cheaper than replacing ductwork, and it pays you back in lower energy bills. Full duct replacement in a Seattle home generally runs $3,000 to $8,000, and that’s a different trade. We’ll tell you honestly when sealing solves the problem and when it doesn’t.
How to Save on Air Duct Cleaning
You don’t need to chase the lowest bid. You need to avoid the one that changes on you.
- Get the price in writing before the technician starts. This single habit saves Seattle homeowners the most money, because the “specials” are built to grow once the crew is at your door. Our written price doesn’t move.
- Bundle services. Adding dryer vent cleaning or furnace cleaning to the same visit typically costs less than booking them separately, since you’re paying for one trip and one setup.
- Time it right. Late summer and early fall are quieter for HVAC work in Seattle than the spring allergen rush. You’re more likely to catch flexible scheduling.
- Change your filters on schedule. A $20 filter change every few months keeps dust out of the ducts and pushes your next cleaning out further. Ask the technician which filter your system takes – Honeywell, Aprilaire, and Guardsman all make filters we install regularly, and we’ll match one to your setup.
- Ask what the guarantee actually covers. A warranty that only covers the day of service isn’t worth much. Ours runs a full 365 days in writing: if the work fails, we come back at no charge, including a free second visit.
Free estimates make this easier. Call (361) 326-5060 and we’ll give you a written number for your Seattle home before anyone shows up.
Why Seattle Prices Land Where They Do
A quick word on why the cheap quotes don’t hold. The equipment to do this work correctly isn’t inexpensive to run. A proper job requires a negative-air machine to pull debris out of the system rather than stir it into your living room, and a rotary brush system to knock buildup off the duct walls. We use Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. That’s commercial-grade gear, and it’s part of why our price is what it is.
A $99 coupon doesn’t cover that setup. So companies that advertise it make up the difference in add-ons, or they run a shop vac through two vents and call it done. Neither one serves you. When you see a number that seems too low for a real Seattle job, ask what equipment they’re running and whether the price is locked in writing. That question alone will sort out most of the field.
We’ve been in business since 2004 as part of the Garrison Partners family, and every location is independently owned and operated under The Garrison Standard. That standard requires four things on every job: arriving inside the quoted window, pricing the work in writing before it starts, completing the job by the book, and leaving the site clean. Technicians are background-checked and uniformed, so you know who’s coming to your door before they knock. Phones are answered by a live person 24 hours a day, seven days a week – no voicemail loop, no waiting until Monday.
What the 365-Day Done Right Promise covers
Every job we do is backed in writing for a full year. If the work fails within 365 days, we come back and make it right at no charge, including a free second visit. No phone tag, no argument about whose fault it is, no mystery fees. That’s the part most outfits in this trade don’t put in writing, and it’s the part that matters most when something goes wrong. Learn more about how we work.
How does air duct cleaning in Seattle compare to other cities?
Seattle sits in the middle-to-upper range nationally. It’s cheaper than San Francisco or Boston, where labor rates push single-system cleanings past $700, and more expensive than most of the South and Midwest, where How Much Does Air Duct Cleaning Cost in Tampa, FL? (2026 Price Guide) shows the same job might run $250 to $450. Our higher costs trace back to King County labor rates, the cost of running a licensed, insured crew here, and the crawl space and attic work that older Seattle housing stock requires. It’s not a markup for the zip code – it’s what the work actually costs to do in this market.
Can you clean ducts the same day in Seattle?
Often yes. Same-day and next-day appointments are regularly available depending on the season and your neighborhood. Because our phones are answered live 24/7, you’re not waiting on a callback to find out. Call (361) 326-5060 and we’ll tell you the soonest slot we have for your area – not a recorded message, not a form.
FAQs – Air Duct Cleaning Cost
How much does air duct cleaning cost in Seattle?
Expect $350 to $600 for a single-system home and $650 to $1,100 for homes with two systems or heavier buildup. Duct sealing adds $600 to $1,800, and dryer vent cleaning adds $125 to $225. Most Seattle homes land near $450. Call (361) 326-5060 for an exact written quote – estimates are free.
Is it cheaper to repair or replace air ducts in Seattle?
Repair and seal is almost always cheaper. Duct sealing runs $600 to $1,800, while full duct replacement in a Seattle home typically runs $3,000 to $8,000. Sealing also cuts the 20% to 30% of conditioned air that leaking joints waste, so it lowers your heating bills too. Call us and we’ll tell you honestly which one your ducts need.
Why is the $99 air duct cleaning special so cheap?
Because it isn’t a real price. A $99 special usually becomes $600 to $900 once the technician is inside and starts adding line items for vents, sanitizing, and “heavy buildup.” A legitimate Seattle job on proper equipment costs what it costs, and we quote it in writing before anyone starts. Call (361) 326-5060 for a number that doesn’t move.
How long does air duct cleaning take?
A single-system Seattle home takes 2 to 3 hours; two-system homes run 3 to 5 hours. If you’re adding dryer vent cleaning or duct sealing, plan for the longer end. We don’t rush a job to fit more appointments into the day, and we don’t leave until the site is clean.
Do you charge extra to come back if the work fails?
No. Our 365-Day Done Right Promise covers the work for a full year in writing. If it fails, we return and fix it at no charge, including a free second visit. That’s the difference between a written guarantee and a verbal “we’ll take care of you.” Call (361) 326-5060 if you’d like a copy of the guarantee before you book.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, part of the Garrison Partners family, serving Seattle since 2004.
Pricing reflects the Seattle market as of 2026. Hollis Air Duct Cleaning offers free estimates – call (361) 326-5060.
What Our Customers Say
"No sales pitch. Told me which parts of the system were fine and only cleaned what needed it."
- Ted L."They checked each section with a camera and showed me the dust before and after. Thorough and honest."
- Nicole H."Duct sealing along with the cleaning cut our summer bill. Straight talk and fair price."
- Gwen O.