Quick answer
Choose a mold removal company by its written scope, not its price. It should name the moisture source and how it will be fixed, describe containment and HEPA air filtration, list the porous material it will remove rather than spray, and say how clearance will be checked. Ask for IICRC mold training, insurance and a state licence where required, and have someone independent do the final test. Most residential jobs run $1,500–$12,000, depending on scale. Call (888) 840-6512 to reach a certified water damage restoration company in your area; the line is answered 24/7.
Written & reviewed by Marcus ReedIICRC WRT
Reviewed September 30, 2026· Next review Mar 2027
A mold removal company should be able to tell you, before it starts, what caused the mold, how it will keep spores from spreading, what it will remove, and how you will know the job worked. A company that cannot answer those four questions in writing is guessing. Most homeowners compare mold quotes on price alone, and the price is the least useful thing on the page.
What to Do Before You Hire
- 1Find and stop the moisture first. Mold grows where something stays wet. Ask every company where the water is coming from. A company that removes mold without fixing the moisture will be back.
- 2Get a written scope from at least two companies. It should list the rooms, the square footage, what is being removed, containment, air filtration, and how clearance is checked.
- 3Check the certification and the licence. Ask for IICRC mold remediation training (AMRT) or an equivalent, liability insurance, and a state mold licence where your state requires one.
- 4Agree how the job will be cleared before it starts. Decide who tests after the work and what result counts as done. Ideally that is someone independent of the company doing the removal.
Questions to Ask Every Company
| Ask | A good answer | A warning sign |
|---|---|---|
| What caused this mold? | Names the moisture source and how it will be fixed | "Mold is everywhere," no source named |
| How will you contain it? | Plastic sheeting, negative air with HEPA filtration | No containment for anything larger than a small patch |
| What will you remove? | Porous material (drywall, insulation, carpet) removed, not sprayed | Spraying or fogging instead of removal |
| How will I know it worked? | Visual check, moisture readings and clearance testing | "You'll be able to tell" |
| Are you licensed and insured? | Gives the numbers so you can check them | Vague, or says it is not needed without checking your state |
| Who is doing the testing? | An independent tester, or they explain their conflict | Same company tests, finds mold and quotes removal |
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Why the Tester and the Remover Should Be Different
A company that tests your home and then quotes to remove what it found has a reason to find more. Some states require the assessor and the remediator to be separate companies for that reason. Where your state does not, it is still worth hiring an independent inspector for large jobs, or at least for the clearance test at the end. The certified mold inspector page covers what an independent inspection involves, and the licence lookup shows which states license mold work.
What It Costs
Most residential mold jobs run $1,500–$12,000. The scale decides where in that range a quote lands:
| Scale | Typical range |
|---|---|
| Under 10 square feet, one wall cavity or bathroom | $1,500–$3,500 |
| One room, with containment and HEPA filtration | $2,000–$5,000 |
| Several rooms or a crawl space | $4,000–$9,000 |
| HVAC involvement or structural framing | $6,000–$20,000 |
A quote far below the others often leaves out containment or clearance. One far above may include rebuilding, which is a separate job. Compare the scopes line by line, not the totals. The mold remediation process page explains each step a proper quote should include.
Red Flags
- A price given over the phone without anyone seeing the mold.
- Pressure to sign the same day, or a "special" that expires.
- A plan built around fogging, sealing or painting over mold instead of removing it.
- No written scope, or a scope with no square footage.
- A promise that the mold will never come back. It will if the moisture does.
If you want a certified company to look at the mold and write up a scope, (888) 840-6512 is answered 24/7 and connects you with a certified company that serves your area. The company gives you an arrival window for your address on the call, and there is no charge for the referral.
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Frequently Asked Questions
What should I look for in a mold removal company?
A written scope that names the moisture source, containment with HEPA filtration, removal of porous material, and a clearance test at the end. Also IICRC mold remediation training, liability insurance, and a state licence where your state requires one.
Should the mold tester and the mold remover be the same company?
Ideally not. A company that tests and then quotes removal has a reason to find more mold. Some states require them to be separate; elsewhere an independent inspector for large jobs or the final clearance test is worth it.
How much does a mold removal company charge?
Most residential jobs run $1,500–$12,000. A small contained area is usually $500–$1,500, one room $1,500–$4,000, several rooms or a crawl space $4,000–$8,000, and HVAC or structural jobs more.
What are red flags when hiring a mold company?
A price over the phone without an inspection, pressure to sign the same day, a plan based on fogging or painting over mold, no written scope, and any promise that mold will never come back.
Do mold removal companies fix the water problem too?
Not always. Remediation removes the mold, but the moisture source may need a plumber, roofer or HVAC contractor. The company should name the source and say who fixes it.
Who do I call right now for water damage?
Call (888) 840-6512. The line is answered 24 hours a day, seven days a week, and connects you with an IICRC-certified water damage restoration company that serves your area. Describe what you can see — where the water is coming from, how long it has been there, and whether it smells — the more specific you are, the faster the right company is on the line.
If the source is a pipe or an appliance, shut the main water valve first. Have four things ready and the call goes quickly: the address, when the water started, what is wet now, and whether you have filed an insurance claim.
Still not sure which of these is your situation? (888) 840-6512 · toll-free · answered 24/7
Sources
- IICRC S500 Standard for Professional Water Damage Restoration
- EPA — A Brief Guide to Mold, Moisture and Your Home
- IICRC S520 Standard for Professional Mold Remediation
Methodology: How we source and verify data · Report an error
Disclaimer: HearthDry is an independent educational resource. This article is for informational purposes only and does not constitute professional, legal, or insurance advice. Consult licensed professionals before making decisions about your property or insurance claims.
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