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.
Before
After
Before
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Before
AfterAir Duct Cleaning Company in Mill Valley, CA
Air duct cleaning in Mill Valley typically runs $350 – $650 for a whole-home system, with most jobs completed in a single visit. We’re Hollis Air Duct Cleaning, and we’ve learned that Mill Valley homes present a specific set of challenges you won’t find in standard suburban tract housing. Between the pre-1960 galvanized ductwork, hillside crawlspaces, and wildfire smoke infiltration from the Marin Headlands, this town’s HVAC systems require a methodical approach and equipment that can handle fine particulate loads. If you’re ready to talk through what your home needs, call us at (361) 326-5060.
Why Mill Valley Homes Are Different
Mill Valley sits in a canyon-floor bowl beneath Mount Tamalpais, and that geography shapes every duct cleaning job we do here. Smoke from wildfires in the Marin Headlands doesn’t pass over this town; it settles and lingers in low-lying neighborhoods like Tamalpais Valley and Almonte, getting drawn into return ducts through outdoor air intakes. After the 2020 Woodward Fire, we found layers of ash inside return ducts in Sycamore Park and Cascade Canyon that standard cleaning wouldn’t touch. Those jobs required HEPA vacuuming with Nikro negative-air machines followed by duct sealing to block recontamination.
The housing stock compounds the problem. Most Mill Valley homes were built before 1960 with original galvanized steel or early flex ductwork that’s brittle, poorly insulated, and routed through hillside crawlspaces that are difficult to access. Multi-level homes on slopes often have duct runs that sag, separate at joints, or serve as rodent pathways. Cool, damp winters create condensation inside those crawlspace ducts, which means we’re regularly addressing mold and musty odors alongside particulate buildup. Dry summers and frequent Red Flag Warnings keep the ash coming. It’s a cycle that demands more than a quick brush-and-vacuum.
Our Main Mill Valley Services
Mill Valley homeowners call us for three core jobs, each with its own page and pricing.
Air Duct Cleaning in Mill Valley
Our air duct cleaning in Mill Valley starts with a rotary brush system from Rotobrush to dislodge buildup from galvanized or flex duct walls, followed by negative-air extraction with Nikro equipment to pull debris out of the system rather than pushing it deeper. In Mill Valley, we pay particular attention to return ducts that have drawn in wildfire smoke and ash. We seal registers before we start, run the system under containment, and show you before-and-after photos of your own ducts. Air Duct Cleaning in Mill Valley is priced as one flat fee per system, agreed in writing before we touch anything.
Dryer Vent Cleaning in Mill Valley
Dryer vent cleaning in Mill Valley matters more than most homeowners realize. Hillside homes often have long, vertical vent runs through multiple stories, and lint accumulates in elbows and transitions that standard brushes can’t reach. We use rotary whip systems and inspect the full run with a camera. In older Mill Valley homes with original venting through walls or roof terminations, we check for proper clearance and airflow. Dryer Vent Cleaning in Mill Valley is a scheduled service with a written price confirmed before arrival.
Duct Sealing in Mill Valley
Duct sealing in Mill Valley addresses the leaks and separations common in pre-1960 systems, especially in crawlspaces where joints have worked loose or rodents have compromised flex runs. We apply mastic sealant and mechanical fasteners at accessible joints, then pressure-test the system to verify results. For homes affected by wildfire smoke, sealing the return side is critical to preventing recontamination. Duct Sealing in Mill Valley includes a written guarantee and before-and-after pressure readings.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Mill Valley
We stock parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies for Mill Valley jobs, with same-day or next-day turnaround on most filter replacements and component repairs. For the full list of equipment we carry and service, see our brands.
Pricing for Air Duct Cleaning Company in Mill Valley, CA
| Service | Typical range in Mill Valley |
|---|---|
| Whole-home air duct cleaning (single system) | $350 – $650 |
| Whole-home air duct cleaning (dual-zone system) | $550 – $950 |
| Dryer vent cleaning (standard through-wall run) | $120 – $180 |
| Dryer vent cleaning (multi-story or roof termination) | $180 – $280 |
| Duct sealing (partial, accessible joints only) | $400 – $700 |
| Duct sealing (whole-system with pressure test) | $800 – $1,400 |
| Mold remediation in ductwork (localized treatment) | $500 – $900 |
| HEPA filtration upgrade (whole-system) | $250 – $450 |
| Return duct smoke/deep particulate cleaning | $200 – $350 add-on |
What pushes Mill Valley prices toward the higher end: multi-level hillside homes with difficult crawlspace access, systems requiring rodent damage repair before cleaning, and jobs needing specialized HEPA containment after wildfire exposure. What doesn’t change the price: the number of vents. We quote one flat price per system, written down before any work starts, and that number doesn’t move at the door.
Neighborhoods We Serve in Mill Valley
We schedule Mill Valley jobs with routing that keeps crews in the area for full days, not scattered across the Bay. Most appointments are available within three to five business days, with dispatch coordinated from our San Francisco Bay Area office.
- Tamalpais Valley
- Almonte
- Sycamore Park
- Cascade Canyon
- Strawberry Village
Service Area – Cities Near Mill Valley
Our crews work throughout southern Marin County and reach Corte Madera, CA, Larkspur, CA, Sausalito, CA, and Kentfield, CA on regular routing days. If you’re unsure whether your address falls inside our service area, call (361) 326-5060 and we’ll confirm before booking.
Serving Mill Valley, CA - Our Local Coverage Area
We’re based in the Mill Valley 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 About Air Duct Cleaning Company in Mill Valley
No permit is required for standard duct cleaning or dryer vent cleaning in Mill Valley. Duct sealing that involves structural modification or new duct installation may require a permit from the Mill Valley Building Department; we’ll flag this during your estimate and handle the paperwork if needed. Call (361) 326-5060 to discuss your specific job.
We prioritize Mill Valley appointments within one week of major smoke events, scheduling permitting. We dispatch from our San Francisco Bay Area office and route crews to stay in Marin rather than crossing bridges multiple times. For urgent post-fire cleaning of return ducts, call (361) 326-5060 and we’ll fit you into the next available slot.
Some Mill Valley neighborhoods, particularly gated or condominium communities near Strawberry Village, have HOA rules about service vehicle parking and weekday-only work hours. We coordinate with your HOA directly when you provide contact details, and we schedule inside whatever window they allow. Call (361) 326-5060 and we’ll handle the logistics.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Mill Valley Customers Say
"Duct sealing along with the cleaning cut our summer bill. Straight talk and fair price."
- Gwen O."Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W."Dryer vent was packed with lint and took two hours to dry a load. Cleaned it out from the roof cap down. One cycle again."
- Paula Q.