Frequently Asked Questions
Eleven years of owner-led duct cleaning across Seattle generates a lot of questions — and we’d rather answer them clearly here than leave you guessing. Below you’ll find straight answers to what homeowners and property managers ask us most, grouped by topic so you can find what you need fast.
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Pricing & Estimates
How much does air duct cleaning cost in Seattle?
Air duct cleaning in Seattle typically ranges from $299 to $699 for a standard residential system, depending on system size, duct count, and accessibility — with most single-family homes in neighborhoods like Ballard, Beacon Hill, and Magnolia landing in the $350–$550 range. Older homes with longer duct runs, homes that haven’t been cleaned in a decade or more, or systems with significant debris accumulation can fall toward the higher end. Richard Anderson walks through pricing before any work begins, so there are no surprises when the invoice arrives. Call (877) 335-1974 for a free, no-obligation estimate tailored to your specific system.
Do you offer free estimates?
Yes — every estimate from Landmark Air Duct Cleaning is free, and we’re specific about what you’re getting quoted for before a single piece of equipment leaves the truck. We don’t use vague package pricing that balloons once we’re inside your home. Because Richard Anderson personally handles both the estimate and the work on most jobs, what you’re quoted reflects what someone with 11 years of hands-on experience actually expects the job to require — not an upsell-optimized figure from a call center. Call (877) 335-1974 to schedule your free assessment.
Are there add-on costs I should expect?
Some jobs do carry additional costs beyond the base duct cleaning price — dryer vent clearing, duct sealing, or air sanitizing treatments are priced separately because they’re genuinely separate services requiring different equipment and time. What we won’t do is manufacture add-ons mid-job. If Richard finds a duct that needs sealing or a dryer vent that’s partially blocked while he’s on-site, he’ll show you the issue and explain the cost before doing anything about it. Seattle homes with older flex duct systems — common in Capitol Hill and Columbia City renovations from the ’80s and ’90s — sometimes need minor sealing work that wasn’t visible until cleaning began; we’ll always flag that upfront.
What payment methods do you accept?
We accept all major credit cards, debit cards, checks, and cash. Payment is collected at job completion, after you’ve had a chance to confirm the work meets your expectations. We don’t require deposits for standard residential appointments.
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Service & Scheduling
How fast can you respond in Seattle?
For standard appointments in Seattle, we’re typically able to schedule within 2–5 business days, and in many cases sooner depending on the week. We serve a focused geographic area centered on Seattle and the surrounding region, which means we’re not dispatching from two counties away — scheduling is tighter and more reliable than larger regional operators. If your situation is more urgent, call (877) 335-1974 directly and we’ll tell you the earliest available slot honestly, without inflating availability to get the booking.
Do you offer emergency air duct cleaning service?
We handle urgent requests on a case-by-case basis and will always communicate availability honestly when you call. Post-construction dust infiltration, post-fire or post-water-damage duct concerns, and situations where HVAC performance has dropped sharply are the scenarios we most commonly field as priority calls. For urgent situations in Seattle, call (877) 335-1974 — if we can move you to the front of the schedule, we will.
What areas do you serve?
Landmark Air Duct Cleaning serves Seattle and the broader Washington service region, with regular work across neighborhoods including Fremont, Queen Anne, West Seattle, Rainier Valley, Northgate, and Green Lake, as well as surrounding communities. You can find the full scope of our Air Duct Cleaning in Washington coverage on our dedicated Washington service page. If you’re unsure whether your address falls in our range, a quick call to (877) 335-1974 will get you a direct answer.
How long does a typical air duct cleaning appointment take?
Most residential duct cleaning jobs in Seattle take between 2 and 4 hours, depending on system complexity, the number of supply and return vents, and how long it’s been since the system was last serviced. A mid-size home with a single HVAC system and around 15–20 vents generally runs closer to 2.5 hours. Homes in older Seattle neighborhoods — particularly Craftsman-era properties in Wallingford or Ravenna that have been modified over decades — sometimes have non-standard duct configurations that add time. We’d rather take the time to do it properly than rush a job that directly affects the air you’re breathing.
Do you guarantee your work?
Yes. If you’re not satisfied with the results of a Landmark Air Duct Cleaning job, contact us and we’ll make it right — that’s a direct commitment from Richard Anderson as both owner and the person who ran the equipment. With 732 verified reviews averaging 4.9 stars, our track record reflects consistent outcomes across hundreds of real Seattle-area homes, not a handful of hand-picked testimonials. That volume of satisfied customers is the most honest form of guarantee we can offer, and we stand behind every job individually.
What’s the step-by-step process for a typical duct cleaning appointment?
- Pre-job walkthrough: Richard or a Landmark technician tours the home with you, locates all supply and return vents, identifies the air handler location, and notes any visible duct concerns — loose connections, damaged flex duct, unusual configurations.
- System protection setup: Furniture and flooring near vent covers are protected. The HVAC system is set to the correct mode for cleaning access.
- Negative pressure establishment: Our Nikro professional-grade vacuum equipment creates negative pressure in the duct system, containing dislodged debris inside the ductwork and vacuum unit rather than releasing it into your living space.
- Rotary agitation cleaning: Our Rotobrush system works through each supply line, mechanically scrubbing debris, dust accumulation, and biofilm from duct walls while the negative pressure system captures it continuously.
- Return duct and air handler cleaning: Return ducts and the air handler compartment are addressed separately — this is where allergen accumulation is often heaviest and where many generalist cleaners cut corners.
- Post-cleaning inspection: Vent covers are reinstalled, the system is run briefly, and any observations about duct condition — sealing needs, visible mold, insulation issues — are communicated directly to you before we leave.
- Optional add-on services: If air sanitizing, duct sealing, or dryer vent clearing were discussed during the estimate, those are completed in sequence before job closeout.
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Licensing, Trust & Credentials
Are you licensed and insured?
Yes — Landmark Air Duct Cleaning is state-licensed and fully insured to operate in Washington. We don’t publish credential numbers on public pages, but we can provide documentation directly upon request before any work begins. For a service that involves technicians inside your home and access to your HVAC infrastructure, verifying this matters — and we take that seriously. Richard Anderson has operated this business under those credentials for 11 years in the Seattle market.
Who actually does the work — is it the owner or subcontractors?
Richard Anderson is both the owner and the lead technician, meaning he personally runs the equipment on jobs — this isn’t a business where the owner quotes the work and sends a rotating crew to execute it. That structure is deliberate: it’s the reason our 732 reviews reflect consistent, repeatable results rather than the hit-or-miss variance that comes with high crew turnover. When you book with Landmark, you know who’s coming, and that person is directly accountable for the outcome.
What equipment do you use, and why does it matter?
We clean with Rotobrush rotary brush systems and Nikro negative-pressure vacuum equipment — the same tool brands used by commercial restoration contractors and industrial IAQ specialists, not consumer or rental-grade alternatives. The difference shows in results: professional-grade agitation combined with true negative pressure containment means debris is removed rather than redistributed. For air quality treatments, we work with products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman — established names in the indoor air quality space that have documented performance behind them.
How do I know if a duct cleaning company is legitimate?
Legitimate duct cleaning companies will confirm state licensing and insurance before the job, use equipment that creates negative pressure containment (not just a shop vac), and provide itemized pricing rather than a vague package quote that changes on arrival. Warning signs include very low flat-rate offers (often called “bait and switch” pricing), pressure to add services once inside the home, and inability to name specific equipment brands. Landmark has operated for 11 years in Seattle with a verifiable review record — 732 reviews averaging 4.9 stars — and Richard Anderson stakes his name on every job. Those aren’t abstractions; they’re the working definition of accountability in this trade.
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Specific Services
Do you handle air duct cleaning for residential homes?
Air duct cleaning is our primary and most-practiced service — it’s what Landmark was built on and what Richard Anderson has focused on exclusively for 11 years. We clean supply ducts, return ducts, and the air handler compartment using Rotobrush and Nikro equipment, and we work on forced-air systems across all common configurations found in Seattle homes, from modern central systems to older partially-converted setups common in neighborhoods like Montlake and Eastlake. Visit our home page for a full overview of how we approach residential duct cleaning. For a quote on your specific home, call (877) 335-1974.
Do you handle dryer vent cleaning?
Yes — dryer vent cleaning is one of Landmark’s five core services, and it’s one we treat with the same thoroughness as full duct system work. A partially or fully blocked dryer vent is a genuine fire risk: the U.S. Fire Administration consistently identifies lint accumulation in dryer exhaust systems as a leading cause of residential structure fires. In Seattle homes — particularly those with long exterior duct runs in colder, wetter months — lint compaction accelerates faster than homeowners typically expect. We clear the entire vent run from the dryer connection to the exterior termination point, confirm airflow, and check the termination cap for bird nesting or weather damage. If your dryer is running hotter than usual, taking more than one cycle to dry a full load, or the exterior vent flap doesn’t open fully when the dryer runs, those are all signs worth acting on promptly.
Do you handle HVAC cleaning?
HVAC cleaning — including the air handler, blower assembly, and coil surfaces — is part of our service scope and is often performed in conjunction with duct cleaning for a complete system result. The ductwork and the HVAC equipment function as one system, and cleaning the ducts thoroughly while leaving a dirty blower wheel or debris-coated evaporator coil partially undoes the work. Richard’s 11 years of exclusive focus on this trade means he understands where the HVAC system and the duct system intersect, and he addresses both as part of a coordinated job rather than treating them as unrelated tasks.
Do you handle duct repair and sealing?
Duct repair and sealing is part of Landmark’s full-service capability. Leaking duct connections, collapsed flex duct sections, and poorly sealed joints are among the most common findings in Seattle homes that haven’t had duct work evaluated in several years — especially in crawl space systems where flex duct is exposed to temperature swings and pest activity. Duct leakage forces your HVAC system to work harder and pulls unconditioned air (potentially carrying moisture, insulation fibers, or crawl space contaminants) into your living space. We use professional-grade mastic and foil tape systems for lasting seals, not off-the-shelf duct tape that degrades within a year or two. If a cleaning inspection reveals sealing needs, Richard will document what he found and quote the repair separately before proceeding.
Do you offer air quality and sanitizing services?
Air sanitizing and indoor air quality treatments are the final tier of Landmark’s service arc — from cleaning to sealing to sanitizing, all under one specialist company. We work with products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman to address microbial contamination, odor sources, and particulate concerns that persist after mechanical cleaning. This service is particularly relevant for homes recovering from water intrusion events, homes with documented mold concerns in the duct system, or multi-pet households where odor treatment alongside cleaning delivers a more complete result. These aren’t products we throw in as an upsell — they’re applied when the specific conditions in a home call for them.
How often should Seattle homeowners have their ducts cleaned?
Most Seattle homes benefit from air duct cleaning every 3 to 5 years under typical conditions, though several local factors can shorten that interval. Seattle’s damp climate means moisture can enter duct systems — particularly in crawl spaces and basements — faster than in drier markets, which accelerates biofilm and mold risk in lined ductwork. Homes near the I-5 or SR-99 corridors also show higher particulate accumulation in ducts due to traffic pollution infiltration. Homes with pets, recent renovations, allergy-sensitive occupants, or systems that went 7–10 years without service often warrant a shorter cleaning cycle going forward. When Richard completes a job, he’ll give you a straightforward recommendation based on what he actually found in your system — not a sales-driven timeline.
What’s the difference between a legitimate duct cleaning and a $99 special?
A $99 or flat-rate discount duct cleaning typically involves a light vacuum pass at each vent opening without negative pressure containment — dislodging debris into the air rather than capturing it, and leaving the majority of duct-wall accumulation untouched. It’s a marketing approach, not a cleaning method. Legitimate duct cleaning requires professional equipment (Rotobrush-style rotary agitation, Nikro-grade vacuum containment), enough time to work through each duct run properly (typically 2–4 hours for a residential system), and a technician experienced enough to identify what actually needs attention. With 11 years of exclusive focus in this trade and 732 reviews averaging 4.9 stars, Landmark’s pricing reflects what it actually takes to deliver a result — not a price point designed to get in the door and upsell from there.
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Key Takeaways
- Residential duct cleaning in Seattle typically costs $299–$699, with most standard homes landing between $350 and $550.
- Free estimates are available — call (877) 335-1974 for a quote specific to your system.
- Richard Anderson serves as both owner and lead technician, bringing direct accountability to every job.
- Landmark uses professional-grade Rotobrush and Nikro equipment — not consumer-grade alternatives.
- Services span the full indoor air quality arc: air duct cleaning, dryer vent cleaning, HVAC cleaning, duct repair and sealing, and air sanitizing.
- 732 verified reviews averaging 4.9 stars reflect consistent results across hundreds of Seattle-area homes.
- Most Seattle homes benefit from cleaning every 3–5 years; damp climates and high-traffic-area homes may need more frequent service.
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Ready to Book or Have More Questions?
If something here didn’t fully answer what you needed, the fastest path to a real answer is a direct conversation. Richard Anderson and the Landmark team have 11 years of experience with Seattle’s specific housing stock, duct configurations, and climate conditions — and we’d rather spend five minutes answering your questions accurately than have you make a decision based on incomplete information. Call (877) 335-1974 for a free estimate or to talk through what you’re seeing in your home. No pressure, no scripts — just a specialist with 732 customers’ worth of experience ready to give you a straight answer.
Written by Richard Anderson, Owner & Lead Technician at Landmark Air Duct Cleaning Service Washington, serving Seattle since 2013.
Have a question we didn’t cover? Call Landmark Air Duct Cleaning Service Washington at (877) 335-1974.