Fast, Reliable Air Duct Cleaning Across Seattle
Professional air duct cleaning in Seattle typically runs $350–$850 for a full residential system, with most single-family homes in neighborhoods like Ballard, Wallingford, and Queen Anne falling in the $450–$650 range. We’re usually on-site within 24–48 hours of your call, and we carry the Rotobrush and Nikro equipment needed to handle Seattle’s unique retrofit-duct challenges right from the truck. Call (877) 335-1974 for a free estimate.
Our Air Duct Cleaning team knows Seattle’s housing stock intimately—Richard Anderson, our owner and lead technician, has spent 11 years crawling through the tight, damp crawl spaces beneath this city’s 1910s–1940s craftsman bungalows. We’ve cleaned ducts in Capitol Hill foursquares, Queen Anne condos with limited access, and Ballard cottages where the original gravity-furnace infrastructure still hides inside the walls. That local knowledge matters when your ductwork was never designed for forced air in the first place.
Why Landmark Air Duct Cleaning Service Washington Is Seattle’s Preferred Air Duct Cleaning Company
We’ve built our reputation one Seattle home at a time. 732 verified customer reviews averaging 4.9 stars—that volume paired with that rating tells you something about consistency. Richard Anderson doesn’t delegate to rotating crews; he’s owner-led on every job, running the equipment himself from arrival to final walkthrough. When a Wallingford homeowner asks why their ducts still smell musty six months after a previous cleaning, Richard can diagnose whether the issue is incomplete cleaning, moisture intrusion from a damp crawl space, or a hidden plenum box the last company never found.
Our response time to Seattle proper is same-day or next-day for standard bookings, and we maintain emergency availability when indoor air quality issues demand immediate attention. We know the difference between a quick surface cleaning and the thorough, systematic approach Seattle’s older, retrofit ductwork actually requires. Our 11 years of exclusive focus on air duct and indoor air quality services—not HVAC repair, not carpet cleaning, not a dozen other trades—means we’ve encountered virtually every duct configuration this city’s housing stock can produce.
Our Air Duct Cleaning Services in Seattle
Residential Duct Cleaning
Seattle’s residential duct cleaning demand has shifted dramatically since 2017. The annual August–September wildfire smoke season—particulate drifting from Eastern Washington and Oregon fires—now creates a predictable spike as homeowners discover fine ash and soot deposits coating their duct interiors just before heating season begins. A typical residential cleaning in Seattle runs $350–$650 for a standard single-system home, with larger foursquares or homes with basement and attic duct runs reaching $750–$850. We use Rotobrush contact cleaning for flex-duct sections and Nikro HEPA vacuum systems for rigid trunk lines, adjusting our approach based on what we find during initial video inspection.
Commercial Duct Cleaning
Seattle’s commercial buildings face a distinct challenge: many converted historic structures in Pioneer Square, Capitol Hill, and the International District contain mixed-era ductwork where original ventilation shafts connect to modern HVAC retrofits. Commercial duct cleaning in these properties typically ranges from $1,200–$3,500 depending on system complexity and square footage. We coordinate with property managers to minimize tenant disruption, often scheduling during early morning or weekend hours. Richard Anderson personally assesses access constraints in older commercial buildings before quoting—no surprises once work begins.
Supply Duct Cleaning
Supply ducts deliver conditioned air to your living spaces, but in Seattle’s retrofit homes they often terminate in wall cavities or floor registers that were never properly sealed during the original forced-air conversion. Supply duct cleaning alone typically costs $200–$400, though we rarely recommend isolated supply cleaning without evaluating the return side and trunk connections. In Ballard and Wallingford craftsmans, we frequently find supply boots disconnected from floor registers, blowing conditioned air into wall cavities instead of rooms—a energy waste and moisture problem specific to this city’s retrofit history.
Return Duct Cleaning
Return ducts pull air back to your HVAC system, and in Seattle they’re particularly vulnerable to crawl space contamination. Persistent marine humidity from October through May keeps crawl space air moisture-laden; when return duct seams separate or flex duct sags to contact damp soil, the system actively draws mold spores and musty air into circulation. Return duct cleaning runs $250–$450 as a standalone service, but we emphasize that cleaning without addressing moisture source and duct integrity is temporary at best in this climate. Our video inspection identifies these structural issues before we quote.
Full System Cleaning
Full system cleaning—supply, return, trunk lines, registers, and grilles—is what most Seattle homes actually need, especially after wildfire smoke exposure or in properties with visible mold concerns. Typical range: $550–$850 for residential systems, with commercial and multi-zone residential running higher. This is our recommended approach for first-time cleanings in older Seattle homes, where partial cleaning risks leaving contamination that immediately re-spreads. We include video inspection documentation so you see what we found and what we removed.
Video Inspection
Our video inspection service uses flexible borescope cameras to document duct interior conditions before and after cleaning—critical for insurance documentation, property sale disclosures, and verifying that hidden chambers like old gravity-furnace plenums have been identified. Standalone video inspection is $150–$250; we waive this fee when bundled with full system cleaning. In Seattle’s retrofit homes, this step frequently reveals surprises: disconnected flex runs, standing water in low points, or sealed plenum boxes containing decades of undisturbed debris.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Seattle
We clean ductwork connected to all major HVAC brands, and we stock sanitizing and sealing products from Aprilaire, Abatement Technologies, and Guardsman on our Seattle-area trucks for same-day installation. If your duct cleaning reveals deteriorated flex duct, failed sealant, or compromised insulation in a damp crawl space, we can source compatible replacement materials and complete repairs without a return visit. For air quality upgrades following cleaning, we install Aprilaire whole-home air purifiers and Abatement Technologies HEPA filtration systems sized to your existing HVAC capacity. Seattle’s moisture-driven air quality challenges demand products designed for persistent humidity—not the dry-climate solutions that fail here within a season.
Common Air Duct Cleaning Problems We See in Seattle Homes
- Retrofit flex duct sagging and disconnecting in tight crawl spaces. Seattle’s craftsman bungalows often have 18-inch crawl spaces where flex duct was jammed through with minimal support. Gravity and moisture degradation cause sagging that creates low points where condensation pools, or complete disconnections that dump conditioned air into the crawl space. We find this in perhaps 30% of Ballard and Wallingford homes over 80 years old.
- Persistent recontamination from unresolved crawl space moisture. Seattle’s marine rainy season keeps relative humidity elevated for eight months; cleaning ducts without addressing the moisture source that feeds mold growth is a temporary fix. We routinely recommend vapor barrier improvements or crawl space sealing alongside duct cleaning for lasting results.
- Sealed gravity-furnace plenum boxes acting as debris reservoirs. When forced-air systems were retrofitted into Seattle’s pre-1940s homes, original gravity-furnace plenums were often left in place and sealed—never connected to new airflow, never cleaned, accumulating decades of organic material. Standard duct cleaning methods miss these entirely because they’re not part of the active system. Our video inspection specifically hunts for these structural artifacts.
- Post-wildfire-smoke particulate accumulation in duct interiors. Since 2017, Seattle’s August–September smoke season has deposited fine particulate matter that standard HVAC filtration cannot capture. We see a predictable annual spike in cleaning requests each October as homeowners fire up heating systems and distribute last month’s smoke deposits throughout their homes. Proactive cleaning before heating season prevents this.
Pricing for Air Duct Cleaning in Seattle, WA
| Service | Typical Range in Seattle |
|---|---|
| Residential full system cleaning (standard home) | $450–$650 |
| Residential full system cleaning (large/multi-zone) | $750–$850 |
| Supply duct cleaning only | $200–$400 |
| Return duct cleaning only | $250–$450 |
| Video inspection (standalone) | $150–$250 |
| Commercial duct cleaning | $1,200–$3,500 |
| Dryer vent cleaning (add-on) | $125–$200 |
What moves your quote within these ranges? System accessibility (crawl space height, attic hatch location), contamination severity (light dust versus mold or smoke residue), and whether we find structural issues requiring repair before effective cleaning. We provide upfront, itemized quotes after inspection—never after work begins. Call (877) 335-1974 for your free estimate.
We Also Serve Cities Near Seattle
Our service radius extends to White Center, Mercer Island, Bellevue, and Boulevard Park—each with their own housing stock characteristics and ductwork challenges. Mercer Island’s mid-century ramblers present different retrofit issues than Ballard craftsmans; Bellevue’s newer construction has its own patterns. Richard Anderson adjusts his approach based on local building era and typical system configurations.
Serving Seattle, WA — Our Local Coverage Area
We’re based in the Seattle area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Air Duct Cleaning in Seattle
Yes—if your home was exposed to significant smoke during August–September wildfire season, duct cleaning before heating season is strongly advisable. Fine particulate matter from Eastern Washington and Oregon fires infiltrates homes through gaps and standard ventilation, then deposits in duct interiors where it remains dormant until your heating system distributes it room-to-room. We see this pattern annually since 2017; proactive cleaning in October prevents your first heating cycle from becoming a contamination event. Call (877) 335-1974 to schedule post-smoke cleaning—we’ll inspect for particulate load and quote accordingly.
We can clean the active forced-air ductwork in your retrofit system, and critically, we can locate and address sealed original plenum boxes that previous cleaners likely missed. Last fall we cleaned a 1920s Ballard craftsman whose forced-air retrofit had left the original gravity-furnace plenum box sealed like a time capsule. Inside that dead-air chamber we found decades of debris—dust, pollen, mouse nests—that the HVAC system never touched, a structural artifact unique to Seattle’s retrofit-heating history. We used our Rotobrush to clear the main lines and recommended a full system cleaning and video inspection to ensure no hidden chambers remained. Call (877) 335-1974 to discuss your specific configuration.
Seattle’s eight-month marine rainy season creates conditions that actively work against lasting cleanliness if moisture sources aren’t addressed. Crawl spaces under pier-and-beam and slab-on-grade homes maintain elevated humidity year-round; cleaned ducts reconnect to this environment and can recontaminate within months if flex duct is contacting damp soil or vapor barriers are compromised. We address this by inspecting for moisture intrusion points during every cleaning, and we recommend crawl space moisture mitigation alongside duct cleaning when conditions warrant. The cleaning itself is effective; the longevity depends on controlling that persistent dampness. Call (877) 335-1974 for an inspection that includes moisture assessment.
Standard homeowners insurance typically does not cover routine duct cleaning, but may cover cleaning necessitated by specific covered perils—water damage from burst pipes, smoke damage from structure fires, or mold remediation following covered water intrusion. We document our findings with video inspection and detailed reports to support insurance claims when applicable. For wildfire smoke damage, some policies are evolving; we recommend reviewing your specific coverage with your agent. We’re happy to provide documentation for any claim. Call (877) 335-1974 and we’ll explain what documentation we can supply.
Yes—we’ve developed specific approaches for Seattle’s multi-family and condo buildings where access is constrained by shared walls, limited parking, and building management protocols. Our Nikro portable HEPA systems and compact Rotobrush configurations fit through standard doorways and operate without the truck-mounted equipment that requires curbside access. We coordinate with building management for parking, elevator use, and notification to neighboring units. Queen Anne’s older condo conversions often have original duct shafts serving multiple units—cleaning requires coordination and specialized equipment we carry routinely. Call (877) 335-1974 to discuss your building’s specific access constraints.
Ready to breathe cleaner air in your Seattle home? Richard Anderson and our team are standing by to inspect your system, identify the hidden issues that generic cleaners miss, and deliver the thorough cleaning your retrofit ductwork actually needs. Every estimate is free, every quote is upfront, and every job carries direct owner accountability from start to finish. Call (877) 335-1974 now—same-day and next-day appointments available across Seattle, from Ballard to Capitol Hill to Queen Anne and beyond.
Written by Richard Anderson, Owner and Lead Technician at Landmark Air Duct Cleaning Service Washington, serving Seattle since 2013.