Find a Verified Mold Removal & Remediation Company

How to choose a mold removal company

Most homeowners hire the first contractor who picks up the phone. That's how the wrong company gets the job. Here's what to check before you sign anything.

A real state license. State rules for mold work vary. Florida, Texas, New York, Louisiana and Washington DC issue licenses specifically for mold work. A few other states cover it another way, such as Connecticut's home improvement registration, Tennessee's Mold Remediation (S-F) contractor classification, Mississippi's commercial Hazardous Materials classification and Virginia's certification requirement for residential mold remediation. Most states issue no mold license, so there, ask for insurance and certifications instead. If a company says "we don't need a license in this state," that might be true; it also means they have no licensing board to complain to if the job goes sideways. Where we hold the state's license records (Florida, Texas, New York and Louisiana), we check the license against them.

Active general liability and pollution insurance. Pollution coverage is the specific policy that covers mold work. Standard contractor insurance often doesn't include it. Ask for a certificate of insurance (COI) with both. If they balk, walk.

Mold remediation credentials, held by the people doing the work. The IICRC publishes the industry standard for professional mold remediation, ANSI/IICRC S520-2024, and offers two mold credentials: the AMRT, a course-and-exam technician credential, and the MRS, an advanced certification that requires at least 12 months of mold remediation field experience. ACAC and NORMI issue remediation credentials too. Most credentials belong to a person, not a company, and an IICRC Certified Firm needs at least one active IICRC certified technician rather than a certified crew, so ask which technicians will do or supervise your job and what each one holds.

Independence from the assessor. This is the step most people miss, and it's our recommendation rather than a universal rule: have one company assess the mold and a different company remediate it. The standard lets a remediator inspect and make its own preliminary determination, and an independent assessment may not be needed when the scope can be determined without one (S520 §1.2.1, §7.4). Florida, Texas, Louisiana, New York and Oklahoma each limit it by law in different ways, and in any state you can hire two companies. A company paid for the cleanup has a potential financial incentive to find more of it; that doesn't make every combined quote inflated, but the incentive points one way. If you need one, find a verified mold inspection company.

A written scope of work before payment. Not a verbal quote. A signed document that specifies the affected area, the protocol, the containment plan, and what "complete" looks like. If they won't put it in writing, they're not the company you want.

How much does mold removal cost?

Nationally, a typical mold remediation job costs $1,223 to $3,757, with an average of $2,369, from 7,952 project costs reported to HomeAdvisor. Small isolated spots come in lower: pros quote $287 to $755 for a small patch on Thumbtack. Whole-house jobs run $10,000 to $30,000 or more, a range HomeAdvisor prints without saying how it measured. The range is wide because the work is variable.

What drives the price:

Affected square footage. The number that matters most. HomeAdvisor prints $10 to $25 per square foot without saying how it measured it, and small jobs cost more per foot because a visit, setup and disposal do not shrink with them.

Where the mold is. Behind drywall is more work than a surface area on a basement wall. Inside HVAC ductwork is more work than behind drywall. Crawl spaces and attics can also need moisture-control work on top of removal, such as a crawl-space vapor barrier or better attic ventilation.

Whether the source is still active. If water is still getting in, the source has to be found and corrected, usually by a plumber or roofer working alongside the remediation, and that work adds cost. It isn't optional: mold problems can recur when the moisture source isn't corrected.

What it's growing on. The species doesn't set the price. CDC says all molds should be treated the same for health risk and removal, Stachybotrys (often called black mold) included. What changes the work is the material and its history: growth on drywall or insulation that has been wet a long time usually means removing the material under more careful controls, which costs more than cleaning a hard surface.

Containment. It's sized to the scope of the job and how likely the work is to spread contamination, from little or none for a small cleanup to sealed work areas under negative air for a large one. The more containment a job needs, the more plastic sheeting, air-filtration equipment and labor it takes.

Good news: a written scope makes the price predictable. Bad news: most contractors don't volunteer a written scope. You have to ask.

If three quotes come in thousands of dollars apart, the wildly different prices aren't necessarily a sign of dishonesty. They're a sign that the contractors are quoting different scopes. The scope is the contract. Get a written scope from each before comparing prices. For more detail, see what remediation typically costs, and where each figure comes from.

The mold remediation process: what to expect

A professional mold remediation job usually runs in the order below. Not every job needs every step: containment is sized to the job, an independent assessment may not be needed when the scope is already clear, and an independent verification afterwards is done when it's required, requested or the job calls for one. If a quote leaves a step out, ask why.

Does homeowners insurance cover mold remediation?

Sometimes. The honest answer is more nuanced than yes or no.

When insurance usually covers it: mold caused by a sudden, accidental water event. A burst pipe, a roof leak from a storm, an overflowing dishwasher. The water damage triggers coverage; the resulting mold is often included up to a policy cap, so check the mold limit on yours.

When insurance usually doesn't cover it: mold caused by long-term moisture, neglect, or maintenance issues. A slow leak you ignored. Condensation from poor ventilation. Flooding from rising water (which usually needs separate flood insurance).

What helps your claim:

• Photos of the original water source, taken before cleanup
• Receipts for any emergency mitigation (dry-out service)
• A written protocol from a qualified mold assessor, licensed where your state requires it (not a verbal quote)
• Filing within the timeframe specified in your policy (often 72 hours from discovery)

An independent assessor's written protocol is usually easier to support with an insurer than a contractor's quote alone, because the assessor isn't the company being paid for the work. That's another reason we recommend separate assessment and remediation. Find a verified, independent mold inspection company near you to handle the assessment side of your claim.

Mold removal services we cover

Verified providers on the site handle the full range of mold removal and mold remediation services. Most jobs fall into one of these categories.

Attic mold removal services

Attics are mold magnets. Roof leaks, poor ventilation, and the temperature swings between heated living space below and cold attic air create exactly the condensation conditions mold needs. Attic jobs often involve not just remediation but ventilation repair and sometimes new sheathing.

Basement mold removal services

Basements stay damp because they're below grade and below average HVAC reach. Basement mold remediation often pairs with dehumidification and sometimes interior waterproofing. Basement mold removal cost typically runs higher than other rooms because of the combined work.

Crawl space mold remediation

Crawl spaces are the most-missed source of household mold. The clues often show up upstairs, such as a musty smell from the floor vents that's worth investigating, but the work happens in a 3-foot tall dirt space few homeowners ever enter. Leaks and drainage get fixed first; in humid climates, a closed crawl space kept dry usually works better than a vented one.

Black mold removal services

Black mold (Stachybotrys chartarum) is the species most homeowners worry about. You can't confirm it by color, and you don't need to: CDC says all molds should be treated the same for health risk and removal, so the work follows the material, how far the growth has spread and how long it has been wet, not the name. Our own precaution, not a CDC or IICRC requirement: leave dark, slimy growth on material that has been wet a long time alone until it can be contained, and don't scrape or dry-brush it.

Emergency mold response

A 24/7 line matters when water is still coming in. Wet materials should be dried as quickly as possible, ideally within 24 to 48 hours, because prompt drying can prevent or limit mold growth. Ask a company whether it answers overnight before you count on it.

Residential mold removal: what homeowners should know

Most residential mold problems show up in the same few places. Basements, bathrooms, attics, crawl spaces, and behind kitchen cabinets near the dishwasher or sink. The pattern is consistent because mold needs moisture, and those are the moist places. The corner of the closet you never open is another one.

Where a homeowner can start: EPA's A Brief Guide to Mold, Moisture, and Your Home says that if the moldy area is less than about 10 square feet, in most cases you can handle the job yourself. That figure is a benchmark, not a cutoff, and EPA doesn't say a professional is required above it. Whatever the size, find and fix the moisture source first. Our recommendation is to bring in a professional at any size when the growth is on porous material that has been wet a long time, inside walls or the heating and cooling system, or after contaminated water. See when DIY makes sense and when it doesn't for the full breakdown.

The signs you should call a pro now, not later:

• Growth spreading beyond a small patch, or on drywall, carpet or insulation that has stayed wet
• A musty smell that won't go away with no visible source, which is worth investigating for hidden moisture or growth
• Someone in the household has asthma, COPD, a mold allergy or a weakened immune system
• Mold returning after you cleaned it yourself
• Water damage from flooding or a long-term leak

Browse by state below or enter your ZIP code to find a mold remediation company near you.

Commercial mold remediation: solutions for business owners

Commercial mold work is a different job from residential, even when the mold itself is the same. The stakes shift. Tenant safety. OSHA compliance. Business continuity. Lease obligations. Insurance coverage that may differ from a homeowner's policy. The remediation protocol is the same, but the surrounding work is heavier.

What's different for commercial:

• Tenant or employee notification often required by lease or state law
• After-hours scheduling to avoid business disruption
• Documentation for insurance, regulatory bodies, and potential litigation
• Coordination with property management, HVAC contractors, and sometimes industrial hygienists
• HVAC-specific remediation when contamination has entered the ductwork

Some companies list commercial work on their profile. Look for the "Commercial" tag or contact the company directly to confirm its commercial experience. Depending on the state and the size of the job, commercial work can also need a state contractor license, and in Mississippi the contractor board's commercial Hazardous Materials classification includes mold remediation. Ask which license the job needs and which certifications, such as the IICRC's, the people on the job hold.

Why choose a verified mold removal company

Most contractor-matching services sell your contact info to anyone who pays. The model is different from HomeAdvisor or Angi. We don't sell your contact info, so no company pays us for the chance to cold-call you.

What we check, and where:

• Identity. Every listing is identity-checked.
• License, where we hold the state's records. In those states the license is matched to the state's records, and we check license expiration dates every day. In other states, most listings have no license record on file with us.
• Insurance, when a company supplies a certificate. We verify the certificate of insurance (COI). Tier A and Tier B require it.
• Google rating and review count. Shown as Google reports them, not submitted by the contractor.

The Trust Tier System ranks providers A, B, or C based on which checks they pass. Tier A (Clinical Grade) providers have verified insurance and a Google rating of 4.0 or higher from at least 5 reviews, and get top placement. Tier C (Verified Pro) listings have no verified insurance yet and are listed below them. A contractor can't pay to skip the check. That's the difference.