Air Quality & Sanitizing Cost - One Flat Price, Nothing Applied Without Asking

Every visit starts with

Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents

Worth knowing

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.

Styles & brands we work with

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Before & after – our own jobs

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How Much Does Air Quality & Sanitizing Cost in Los Angeles?

Air quality and sanitizing service in Los Angeles typically runs $350 to $1,400 for a whole-home duct cleaning and sanitizing package, with most single-family homes landing between $500 and $900. Standalone add-ons like UV-C lights or duct sealing push a full project toward $1,800 to $2,600. The exact number depends on your square footage, the number of vents, how long it’s been since the system was last cleaned, and whether we find mold, rodent debris, or heavy buildup once we’re inside.

We price every job in writing before we touch anything. Hollis Air Duct Cleaning has been at this since 2004 as part of the Garrison Partners family, and the rule is simple: the number on the estimate is the number on the invoice. No door-step surprises.

Key Takeaways

• Whole-home duct cleaning in Los Angeles: $350 – $900 for most homes.
• Sanitizing with EPA-registered products: $150 – $400 added to a cleaning.
• UV-C in-duct air purifier install: $450 – $1,200 per unit, depending on system size.
• Los Angeles pricing runs higher than inland markets because of wildfire smoke seasons, marine-layer humidity near the coast, and older duct systems in pre-1970s housing stock.
• Every Hollis job carries the 365-Day Done Right Promise – written, not verbal.

Air Quality & Sanitizing Cost Breakdown (2026)

Below are real ranges for what we see across Los Angeles jobs in 2026. Your number will fall inside these bands, not somewhere vaguely near them.

What pushes a Los Angeles job toward the top of these ranges? Square footage above 2,500, more than 18 supply vents, a second HVAC system, visible mold growth in the plenum or on coil fins, rodent or bird debris in the return runs, and duct runs that were installed before the 1978 federal ban on asbestos-containing materials. Homes in older neighborhoods like Highland Park, Echo Park, and Boyle Heights show up with original rigid ductwork and flex runs that have never been touched, and that takes longer to clean properly. Homes in newer builds out in Porter Ranch or Playa Vista are usually faster and land at the lower end.

What keeps pricing down: a single system, under 15 vents, easy attic or crawlspace access, and a system that’s been cleaned within the last three to four years. We’ll tell you honestly if you don’t need the full package. Some homes just need a dryer vent cleared and a filter upgraded, and that’s a $200 – $300 visit, not a $1,400 one.

What Affects Air Quality & Sanitizing Pricing in Los Angeles

Six factors drive the number, and they’re specific to how Los Angeles homes are built and how the air here behaves.

• Square footage and vent count. A 1,200-square-foot bungalow in Atwater Village with 10 vents is a different job than a 3,200-square-foot home in Sherman Oaks with 22 vents and two systems. More vents mean more brush passes, more negative-air time, and more sanitizing product.
• Wildfire smoke exposure. Since 2018, we’ve seen a marked uptick in fine particulate and ash residue coating interior duct walls after major fire seasons in the San Gabriel Valley and Santa Monica Mountains. Sanitizing after heavy smoke infiltration takes more product and more runtime than a routine maintenance clean.
• Marine layer humidity and coastal mold. Homes west of the 405, from Santa Monica through El Segundo and up into the South Bay, sit in year-round coastal humidity that feeds mold growth on coil fins and duct lining. If we find active growth, sanitizing goes from optional to necessary, and that’s usually a $250 – $400 line.
• Age and material of the duct system. Pre-1970s homes often have rigid galvanized duct with mastic that’s cracked and failing. Older flex duct in the same neighborhoods tears easily and sometimes needs partial replacement, which we’ll price separately before doing any of it.
• Contaminants found during inspection. Rodent droppings in return plenums are common in hillside homes near Griffith Park and the Hollywood Hills. Nesting material, dead insects, and construction dust from nearby remodels all add handling time and containment cost.
• Sanitizing product and method. A basic EPA-registered fog treatment is the low end. A full sanitizing cycle using botanical or oxidizing agents, plus UV-C installation for ongoing control, sits at the top. The difference is duration of effect, not marketing language.

We use the trade’s real tools. A rotary brush system from Rotobrush scrubs the duct walls rather than just blowing air through them, which matters because loose debris that a vacuum alone would miss gets loosened and captured. Negative-air machines from Nikro and Abatement Technologies hold the work area under vacuum so nothing we dislodge ends up in your living room. For filtration, we install products from Honeywell, Aprilaire, and Guardsman, matched to your system’s static pressure so we don’t choke the blower.

If what you actually want is a broader look at indoor air, the details live on our Air Quality & Sanitizing in Los Angeles page. This page is about the dollars.

How to Save on Air Quality & Sanitizing

There’s no coupon trick here. The savings come from doing the right things in the right order.

• Bundle the work. Adding dryer vent cleaning to a duct cleaning is dramatically cheaper than booking it alone six months later. Same trip, same setup, less labor time.
• Skip sanitizing if you don’t need it. Routine cleaning every three to five years keeps most ducts clean enough that sanitizing isn’t warranted. We’ll say so. A written estimate that tells you “no” is worth more than a pitch that says “yes” to everything.
• Upgrade your filter instead of chasing add-ons. A properly sized high-MERV filter or a media cabinet from Aprilaire or Honeywell catches most of what irritates people, and it works every day the system runs, not just on service day.
• Fix the source before the symptom. If your return plenum has a gap pulling attic air, cleaning the ducts today won’t matter much. Duct sealing costs $450 – $1,200 and pays for itself in efficiency over a couple of seasons.
• Book during off-peak months. Late spring and early fall are the slowest weeks in Los Angeles, and scheduling is easier. We don’t run surge pricing, but you’ll get a better choice of appointment windows.
• Ask for the written estimate. Every Hollis estimate comes in writing before work starts. That’s not a discount, but it’s the single most reliable way to avoid a price that moves at the door – which is the most common complaint we hear from Los Angeles homeowners about other companies.

Estimates are free. Call (361) 326-5060 and we’ll give you a range over the phone, then a written number after we see the system.

FAQs – Air Quality & Sanitizing Cost

How much does air duct cleaning and sanitizing cost in Los Angeles?

Expect $500 to $1,000 for a combined cleaning and sanitizing on a typical single-family home in Los Angeles, with larger homes or heavier contamination reaching $1,400 to $1,800. Homes under 1,500 square feet with a single HVAC system often land at $450 to $650. Call (361) 326-5060 for an exact quote – estimates are free.

Is it cheaper to clean my ducts or replace them?

Cleaning is almost always cheaper. A full duct replacement typically runs $3,500 to $8,000 in Los Angeles, while cleaning and sanitizing stays between $500 and $1,400. Replacement only makes sense when the ductwork is crushed, severely water-damaged, or made of materials that can’t be salvaged. We’ll tell you which situation you’re in before we quote anything.

How much does UV-C air purifier installation cost in Los Angeles?

UV-C in-duct units run $450 to $1,200 per unit installed, with most single-system homes coming in around $650 to $900. If you have two air handlers, you need two units, so double that. The price includes a licensed install, wiring, and a filter check. Call (361) 326-5060 to schedule a walkthrough.

Can you come the same day for air quality and sanitizing?

In most cases, yes. We answer the phone with a live person 24 hours a day, seven days a week, and same-day service is commonly available across Los Angeles when you call before mid-afternoon. Emergency calls after a fire, water intrusion, or a rodent problem get priority. Call (361) 326-5060 and we’ll tell you what we’ve got open today.

Does air duct cleaning actually help with allergies in Los Angeles?

It helps most when the ducts are loaded with particulate, mold spores, or pest debris – which is common in Los Angeles homes after wildfire seasons and in humid coastal neighborhoods. Cleaning removes the reservoir; sanitizing and a proper filter keep it from rebuilding. For homes that are already clean, the measurable benefit is smaller than the marketing suggests, and we’ll say that too. Call (361) 326-5060 for a straight assessment.

What does the 365-Day Done Right Promise cover?

It covers the work we did, in writing, for a full year. If a duct sealing job fails, if a sanitizing treatment doesn’t hold, or if a connection we made comes loose, we come back and make it right at no charge – including a free second visit. That’s standard on every Hollis job, not an upgrade you pay for.

Why are Los Angeles prices higher than other California markets?

Three reasons: labor costs, coastal humidity that drives mold remediation demand, and the frequency of wildfire smoke events that push sanitizing from optional to necessary. Add older housing stock in central and east Los Angeles, where ducts were installed decades ago and have never been cleaned, and the average job takes longer than a comparable home in the Central Valley or Inland Empire.

Written Pricing, Every Time

Hollis Air Duct Cleaning has been serving homeowners since 2004 as part of the Garrison Partners family, operating under The Garrison Standard. That means we arrive inside the quoted window in uniform, the price is written down before any work begins, the job is done by the book, and the site is left clean. Our technicians are background-checked, and every job carries the 365-Day Done Right Promise in writing.

If you’ve been burned before by a crew that quoted one number and charged another, that’s exactly the problem we built our process to eliminate. We’ll give you a written range for Los Angeles air quality and sanitizing work, explain what each line covers, and let you decide. Call (361) 326-5060 for a free estimate – a live person answers, day or night.

Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Los Angeles since 2004.

Pricing reflects the Los Angeles market as of 2026. Hollis Air Duct Cleaning offers free estimates – call (361) 326-5060.