Air Duct Cleaning in San Anselmo, CA
Air duct cleaning in San Anselmo typically runs $380-$580 for a standard single-system home, with most jobs completed in one visit and verified by camera before we leave. Our crews serve San Anselmo from our San Francisco Bay Area office, and we know the crawl-space ductwork beneath the Craftsman bungalows along San Anselmo Avenue and the hillside Victorians above Red Hill Avenue. Call (855) 401-6006 for upfront pricing and a free estimate.
Why San Anselmo Homes Are Different
San Anselmo sits at the bottom of the Ross Valley along San Anselmo Creek, giving it significantly higher ambient humidity and a documented history of street-level flooding compared to the hillside and bayside towns surrounding it. Older ductwork routed through crawl spaces here accumulates mold, silt residue, and pest debris at rates that genuinely surprise homeowners accustomed to drier inland climates. Layered on top of that, the town’s hard position on Marin County’s wildland-urban interface means fine ash and smoke particulate from recurring regional fire events has repeatedly infiltrated the aging duct systems of pre-1950s homes that lack modern filtration. Most of San Anselmo’s housing stock was built between 1905 and 1950, and many still carry original sheet-metal ducts with degraded mastic joints through uninsulated crawl spaces that stay wet through winter.
Air Duct Cleaning in San Anselmo
We open every San Anselmo job with a camera inspection because the conditions inside these older systems rarely match what homeowners expect. The combination of valley-trapped moisture, creek-flood silt, and fire-season ash creates contamination profiles we don’t see in newer, drier markets. Air Duct Cleaning from Bellows includes full supply and return network cleaning, register and boot service, and main trunk line agitation with HEPA-contained vacuums.
Residential Duct Cleaning
San Anselmo’s Craftsman bungalows near San Anselmo Avenue and Victorian cottages off Center Boulevard run original or partially updated forced-air systems through crawl spaces that trap Ross Valley moisture. These older sheet-metal ducts with degraded mastic joints collect contamination, leak conditioned air, and admit pests in ways tract-home flex-duct simply doesn’t. A typical residential duct cleaning in San Anselmo runs $380-$580 for a standard single-system home up to about 2,500 square feet, while larger hillside properties with multiple zones range from $550-$780.
Supply Duct Cleaning
Supply ducts in San Anselmo push conditioned air through the same damp crawl spaces where mold colonizes and dust mites proliferate. We clean each supply branch individually, sealing registers during the process to prevent cross-contamination, then verify clearance with camera inspection. Full system cleaning including HVAC cabinet and coil cleaning adds $180-$320, and standalone video inspection runs $180-$250, credited toward full cleaning if you proceed within 30 days.
Why are San Anselmo ducts more prone to mold than those in nearby Fairfax?
San Anselmo sits at the bottom of Ross Valley, where fog and moisture pool between the Marin hills, keeping crawl spaces and ductwork measurably damper than Fairfax’s elevated, better-drained terrain. This persistent humidity accelerates mold and dust-mite growth inside ducts that Fairfax homes simply don’t experience at the same rate. If you’re seeing musty odors or allergy symptoms, call (855) 401-6006 for a free video inspection.
Dryer Vent Cleaning in San Anselmo
Dryer vent cleaning in San Anselmo typically runs $180-$260 for a standard single-story home, though properties near San Anselmo Creek often require additional time for silt and mold extraction. If your dryer takes two cycles to finish a load, or you notice a burning smell near the laundry room, you’re past due. Dryer Vent Cleaning from Bellows includes camera inspection, rotary agitation cleaning, and written documentation of the vent condition.
Vent Cleaning and Lint Removal
Standard lint removal in San Anselmo homes runs deeper than the screen you clean after each load. We use Rotobrush and Nikro power vacuums to extract packed lint from the full run, and for homes near the creek, we often pull out material that’s part lint, part mold, part fine silt from past inundation events. Standard dryer vent cleaning for a single-story, accessible run runs $180-$260, while two-story or extended runs range from $240-$340.
Vent Rerouting
Some San Anselmo homes need more than cleaning. Original vent runs through crawl spaces may be crushed, corroded, or routed in ways that violate current Marin County fire codes. We reroute through attics or interior walls using smooth-wall aluminum duct rated for dryer exhaust temperatures. Vent rerouting with new smooth-wall duct runs $340-$620, and vent cap replacement with bird guard runs $140-$260.
How often should I have my dryer vent cleaned if I live within a block of the creek?
Annually, and we recommend inspection every six months if you’ve had past flooding or visible mold. The 2019 flood event left silt residue in vents we’re still finding in homes that haven’t been serviced since. Our $89 Seasonal Tune-Up includes a quick camera check and lint-screen cleaning. Call (855) 401-6006 to schedule.
HVAC Cleaning in San Anselmo
Professional HVAC cleaning in San Anselmo typically runs $380-$580 for a complete system service, and most jobs are finished in a single visit. The same valley moisture and fire particulate that contaminates ducts also coats coils, blowers, and cabinets, reducing efficiency and recirculating debris every time the system cycles. HVAC Cleaning from Bellows addresses the full mechanical system, not just the duct network.
Evaporator Coil Cleaning
The evaporator coil is where your system meets San Anselmo’s damp valley air, and it’s where we find the most trouble. In homes near San Anselmo Creek, we’ve pulled coils caked with a paste of dust, mold, and fine silt left by past flooding. Evaporator coil cleaning with treatment runs $220-$340, and we follow with Guardsman biocide to slow regrowth in this moisture-heavy climate.
Blower Cleaning
The blower wheel moves every cubic foot of air through your house, and in San Anselmo’s older homes, that air carries crawl-space debris, rodent droppings, and ash particulate from regional fire events. We remove the blower assembly, clean the wheel and housing with HEPA-contained vacuums, and balance it before reinstall. Most blower cleanings in San Anselmo run $180-$320 as part of a larger service.
My 1920s Craftsman bungalow has original sheet-metal ducts-can they be cleaned without damage?
Yes, original sheet-metal ducts clean well with controlled agitation and HEPA vacuum pressure. The risk is not the metal itself but the degraded mastic at the joints, which we inspect first. If seals are failing, we recommend duct sealing after cleaning to prevent recontamination. We’ve cleaned hundreds of these systems in San Anselmo without damage. Call (855) 401-6006 to discuss your home.
Duct Repair & Sealing in San Anselmo
Most duct repair calls we take from San Anselmo are not about loud noises or complete failures. They’re about air that smells wrong, rooms that never reach temperature, and energy bills that climb without explanation. If your home was built before 1950 and still runs original or partially updated ductwork through a crawl space, you’re probably living with problems that developed slowly enough to feel normal. Duct Repair & Sealing from Bellows starts with camera inspection and pressure testing, then delivers one honest price before we lift a tool.
Duct Sealing
San Anselmo’s pre-1950s homes were built with sheet-metal ducts joined by mastic that has dried, cracked, or washed out over decades. In the damp crawl spaces near San Anselmo Creek, we’ve found mastic joints so degraded that daylight shows through from the living space above. We reseal with modern mastic compounds and reinforced tape rated for wet conditions, then pressure-test to verify. Duct sealing for a whole system runs $450-$850.
Flex Duct Repair
Flex duct is common in additions throughout San Anselmo, but the valley-floor humidity causes the inner insulation layer to delaminate from the plastic core, creating pockets where mold colonies establish and spread. Near the creek, we’ve replaced flex ducts compressed by silt deposits left after inundation events, cutting airflow to bedrooms by half. Flex duct repair or section replacement runs $180-$340 per run.
My home near San Anselmo Creek flooded last winter. How do I know if my ductwork was damaged?
If your crawl space took water, your ducts almost certainly did too. Look for musty odors when the system runs, uneven heating or cooling between rooms, or visible rust on floor registers. We recommend a camera inspection to check for silt lines, mold growth, and collapsed flex-duct sections. Call (855) 401-6006 for a free estimate.
Air Quality & Sanitizing in San Anselmo
Air quality and sanitizing service in San Anselmo typically runs $280-$650 for most residential duct systems, with appointments coordinated through our San Francisco Bay Area office for Marin County scheduling. The same moisture, silt, and wildfire residue that demands mechanical cleaning also requires targeted antimicrobial treatment once the debris is extracted. Air Quality & Sanitizing from Bellows is never a surface spray; it’s EPA-registered fogging followed by mechanical agitation and HEPA extraction.
Mold Treatment
San Anselmo’s valley-floor humidity creates persistent moisture conditions in crawl spaces where most of the town’s ductwork lives. We treat mold with EPA-registered antimicrobial fogging followed by mechanical agitation and HEPA extraction, not just surface spraying. For homes near San Anselmo Creek where flooding has occurred, we also inspect for biofilm colonies that standard dry-air sanitizing cannot reach. Typical mold treatment in San Anselmo runs $340-$580.
Odor Removal
The combination of wildfire smoke residue, creek-flood sediment, and persistent humidity creates layered odor problems unique to San Anselmo’s valley-floor homes. Our process includes source identification through camera inspection, particulate removal with Rotobrush mechanical scrubbing, and activated carbon or ozone treatment as appropriate. Odor removal service in San Anselmo typically costs $320-$520.
Do I need a different sanitizing approach if my house is within the San Anselmo Creek flood zone?
Yes, homes within a block or two of the Creek routinely require enzymatic fogging for clay-rich silt deposits that trap odor-causing bacteria, plus inspection for warped flex-duct collars and moisture-wicking joints. Standard dry-air sanitizing cannot neutralize these flood-specific contaminants. We adjust our protocol and pricing accordingly, and we’ll tell you before we start. Call (855) 401-6006 for details.
Brands We Service in San Anselmo
Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same brands serious HVAC contractors specify. We stock Guardsman biocide treatments and Honeywell UV-C systems locally, so most San Anselmo jobs need no ordering delay. See our brands for the full list.
Pricing for Air Duct Cleaning in San Anselmo, CA
| Service | Typical range in San Anselmo |
|---|---|
| Standard residential air duct cleaning (single system) | $380-$580 |
| Larger homes or dual-zone systems | $550-$780 |
| Full system cleaning with HVAC cabinet and coil | Adds $180-$320 |
| Standalone video inspection | $180-$250 |
| Dryer vent cleaning (single-story) | $180-$260 |
| Dryer vent cleaning (two-story or extended run) | $240-$340 |
| Evaporator coil cleaning with treatment | $220-$340 |
| Blower cleaning (standalone) | $180-$320 |
| Whole-system duct sealing | $450-$850 |
| Flex duct repair / section replacement | $180-$340 per run |
| Mold treatment | $340-$580 |
| Odor removal | $320-$520 |
Prices in San Anselmo run slightly higher than inland Bay Area markets because crawl-space access is often tighter in these older homes, and flood or moisture damage frequently requires more extensive material replacement. We disclose the full price before starting; the number on the phone is the number on the invoice.
Neighborhoods We Serve in San Anselmo
We work across the full 94960 and 94979 ZIP codes. Most San Anselmo calls are scheduled within 24-48 hours.
- San Anselmo Knolls
- The Flats near Sir Francis Drake Boulevard
- Creek Road corridor
- Red Hill Avenue area
- Sleepy Hollow
Service Area - Cities Near San Anselmo
Our crews serve San Anselmo, CA and the surrounding Marin County communities including Fairfax, CA, Kentfield, CA, San Rafael, CA, Larkspur, CA, and Lucas Valley-Marinwood, CA. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, with local crews assigned to minimize drive time and keep appointment windows reliable.
Serving San Anselmo, CA - Our Local Coverage Area
Bellows Air Duct & Vent Co. of California crews serve San Anselmo and the communities around it; dispatch is coordinated from our San Francisco Bay Area office. The map shows the San Anselmo coverage area; if your address is on it, we can help.
Also serving nearby: San Anselmo, CA, Fairfax, CA, Kentfield, CA, San Rafael, CA, Larkspur, CA, Lucas Valley-Marinwood, CA.
FAQs About Air Duct Cleaning in San Anselmo
No permit is required for standard residential air duct cleaning in San Anselmo. Duct repair, modification, or new installation may trigger Marin County building department requirements, and we’ll advise if your job crosses that line. We handle the paperwork when needed. Call (855) 401-6006 to discuss your specific situation.
Every 3-5 years for most pre-1950s San Anselmo homes, though homes on the floodplain near San Anselmo Creek or with known moisture issues may need more frequent inspection. The original sheet-metal ducts and degraded mastic joints in these houses accumulate contamination faster than modern systems. We recommend starting with a video inspection to establish a baseline. Call (855) 401-6006 to schedule.
Ready to see what’s inside your ducts? Call Bellows Air Duct & Vent Co. at (855) 401-6006 for a free estimate. We’ll show you the camera footage, give you one honest price before we start, and back the work with our 90-Day Done Right Promise in writing.
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 San Anselmo Customers Say
"Did the dryer vent while they were here for a small add on price. The dryer finishes a load in one cycle now instead of two."
- Adam Pruitt"The allergies in this house had been bad since we moved in. It has been a couple of months since they did the ducts and it is noticeably better. Not a miracle, but real."
- Vikram Rao"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Grace Chen