house-cleaning

Wildfire Smoke and Ash Cleanup Inside Your California Home: What to Do and What It Costs

How to clean wildfire smoke and ash from inside a California home safely: first steps, wet cleaning methods, duct cleaning, when to hire a pro, and what it costs.

Wildfire Smoke and Ash Cleanup Inside Your California Home: What to Do and What It Costs

Ash from a California wildfire is not ordinary dust. It carries fine particulate, heavy metals from burned structures, and in the case of fires that have moved through neighborhoods, asbestos, lead, and chemicals from paint, plastics, and vehicles. Cleaning it out of a house that was downwind of a fire is a different job from a normal deep clean, and the approach depends on how close the fire came, how long the smoke lingered, and whether the house was sealed or open during the event.

Every part of the state has had to deal with this since 2017. The Bay Area lived under smoke for weeks during the 2020 fire season, Los Angeles neighborhoods from Altadena to the Pacific Palisades faced ash fall in January 2025, and Sacramento, the Central Valley, and the Sierra foothills see smoke most summers. Homes that never faced flames still end up with a gray film on every surface, a smell that lingers in fabrics, and HVAC filters loaded with soot.

This guide covers what to do in the first days, how to clean safely, when to hire a professional, and what the professional work costs across California.

First Steps Before Cleaning Anything

Wait until the air quality outside has improved before opening the house to ventilate, and check the local air district's readings rather than judging by the view. Opening windows while the AQI is still above 150 pulls more smoke in than it lets out. Once the outdoor air is clean, ventilating for several hours a day for a few days moves a lot of the lingering odor out.

Replace the HVAC filter before running the system, and use a MERV 13 or higher filter if the system can handle it. Running the fan with a loaded filter pushes fine ash through the ducts and back into the rooms. If the system ran during the smoke event, the ducts likely need cleaning, which is covered below.

Wear an N95 or P100 respirator, gloves, and eye protection for any ash cleanup, and keep children and pets out of the areas being cleaned. Ash from burned structures can contain lead and asbestos, and dry sweeping or vacuuming with a standard household vacuum puts it back into the air. Do not use a leaf blower indoors or out for ash.

Cleaning Ash From Surfaces the Right Way

Wet cleaning is the rule. Ash on hard surfaces should be wiped with a damp microfiber cloth or a mop and a mild detergent, rinsed frequently, and the water disposed of down a drain rather than onto the yard. Dry dusting spreads the fine particles, and feather dusters and dry Swiffers make things worse.

Vacuuming is fine with a HEPA-filtered vacuum. Standard vacuums exhaust the smallest particles back into the room, and shop vacuums without a HEPA filter are the worst offenders. Vacuum carpets, upholstery, and drapes slowly with a HEPA unit, then follow with wet cleaning where the fabric allows it.

Work from the top of each room down and from the far end of the house toward the exit, so cleaned areas stay clean. Ceiling fans, the tops of cabinets and door frames, window sills and tracks, light fixtures, and the tops of picture frames collect the most ash and are the surfaces that keep releasing it for weeks if skipped. Bag the used cloths and vacuum contents and put them in the trash, not the compost.

Fabrics, Soft Goods, and Odor

Curtains, bedding, clothing, and washable slipcovers should be laundered in the hottest water the fabric allows, with an extra rinse. Add a cup of white vinegar or a commercial smoke odor additive to the wash for items that took the most smoke. Dry cleaning handles the things that cannot be washed, and dry cleaners in fire-affected areas of California see a surge after every event.

Upholstered furniture, mattresses, and area rugs are harder. Professional upholstery cleaning with hot water extraction costs $80 to $200 per piece, and carpet cleaning runs $0.25 to $0.50 per square foot. Items that still smell after cleaning may need ozone or hydroxyl treatment by a restoration company, which is the step most homeowners cannot do themselves.

When to Hire a Professional

A house that was simply downwind of a distant fire and picked up a light film of ash is a job for a thorough deep clean, either by you or by a house cleaning company that has done smoke cleanup before. A house that sat under heavy smoke for days, or that is within a few blocks of burned structures, is a job for a restoration contractor with the equipment to handle contaminated ash and embedded odor.

The signs that you need a restoration company are a smell that returns after cleaning, visible soot on walls and ceilings, ash inside closets and cabinets that were closed, and any ash that came from a fire that burned homes rather than only vegetation. Restoration firms use HEPA air scrubbers, dry-ice or soda blasting for soot on framing, thermal fogging or ozone for odor, and containment to keep the contamination from spreading during the work.

Testing is worth the money when the fire burned structures nearby. An industrial hygienist can sample for lead, asbestos, and heavy metals in the ash and tell you whether the house needs a hazardous materials protocol or a standard cleanup. Testing costs $500 to $2,000 and often determines whether insurance covers a full remediation.

Ducts and HVAC

Duct cleaning after a smoke event costs $400 to $1,200 for a typical California home, and it should include the air handler, the blower, and the coil, not just the duct runs. A company that only vacuums the registers is not doing the job. If the system ran during the smoke, the evaporator coil is often coated in soot and needs to be cleaned or replaced, which adds $300 to $1,500.

Replace the filter again after the duct cleaning and again a month later. A portable HEPA air purifier sized for the largest room, running continuously for a few weeks, removes a large share of the particulate that keeps settling out of the air.

What Professional Cleanup Costs in California

A deep clean of a three-bedroom home by a house cleaning company after light ash exposure costs $400 to $900 in most of California, with the Bay Area and Los Angeles at the top of that range. Companies that specialize in post-fire cleaning charge more and take longer, often two visits at $600 to $1,500 total. These prices are approximate.

Restoration contractor work for a home with heavy smoke and soot but no fire damage runs $3,000 to $15,000 depending on size and severity. That covers HEPA cleaning of every surface, duct cleaning, odor treatment, and cleaning or disposal of soft goods. Homes near burned structures that require a hazardous materials protocol, with containment and worker protection, cost $10,000 to $40,000 or more.

Insurance often covers smoke and ash cleanup under the dwelling or personal property coverage of a California homeowners policy when the damage came from a fire event, and the FAIR Plan covers it in many cases as well. Document everything with photos before cleaning, keep receipts, and call the carrier before hiring a restoration company, since many insurers have preferred vendor lists and pricing agreements. You can compare house cleaning and post-fire cleanup services in your part of California to find companies that have handled smoke events before.

Preventing the Next Round

Sealing the house before the smoke arrives makes the cleanup smaller. Weatherstripping on doors and windows, closing fireplace dampers, and running the HVAC on recirculate with a MERV 13 filter keep most of the ash out. Homes in the Sierra foothills, the Santa Cruz Mountains, and the Los Angeles and San Diego canyons that face smoke most years benefit from a whole-house filtration upgrade at $1,500 to $4,000.

Keep a supply of N95 masks, replacement HVAC filters, and a HEPA air purifier on hand before fire season, since stores sell out during events. Our home care and disaster recovery guides on the blog cover the outdoor side of ash cleanup, including roofs, gutters, pools, and gardens.

Frequently Asked Questions

Is wildfire ash in my house dangerous?

Ash from vegetation fires is an irritant and should be cleaned with a mask and wet methods. Ash from fires that burned structures can contain lead, asbestos, and heavy metals, and homes near burned neighborhoods should be tested before a full cleanup.

Can I vacuum wildfire ash with a regular vacuum?

No. Standard vacuums exhaust the finest particles back into the room. Use a HEPA-filtered vacuum, and wet-wipe hard surfaces rather than dry dusting.

How much does professional smoke cleanup cost in Los Angeles?

A deep clean after light ash exposure runs $500 to $1,000 for a three-bedroom home. Restoration work for heavy smoke and soot runs $4,000 to $15,000, and hazardous materials protocols near burned structures can exceed $20,000.

Does homeowners insurance cover smoke and ash cleanup in California?

Often yes, when the damage results from a fire event, including under the FAIR Plan. Photograph the ash before cleaning, keep receipts, and call your carrier before hiring a restoration company.