This week

Something else: the mold first aid that fits every case

Whatever the details, the order is the same. Stop the moisture, size the growth, then decide whether it is you or a contractor. None of that needs a test.

What is probably happening

Mold means moisture. The EPA and CDC both start there: find and fix the water, or the mold returns.
Size decides who does it. Under about 10 square feet on a dry surface, the EPA says in most cases you can handle it yourself. Larger, hidden, in the HVAC, or after sewage: a professional.
Health decides the pace. Asthma, allergy, lung disease or a weak immune system in the home means keep them away and move faster.

Do this in the next five minutes

Find the water. Leak, condensation, humidity, seepage. If it is still active, that is the job. Go back and pick 'after a leak'.
Measure the growth. Photograph it.
Small and dry: N95, goggles, gloves, detergent and water, dry completely. Throw out moldy porous items.
Bigger, or unsure: get two or three written quotes that name square footage, containment and the moisture fix.
Look up any state mold license yourself. Florida, Texas, New York, Louisiana and DC license this work.

Do not

Do not buy an air test as step one. The EPA says sampling is unnecessary when mold is visible, and no federal airborne limit exists to compare it to.
Do not let the tester be the remover.
Do not reach for bleach as the fix. The EPA does not recommend it as routine practice, and never mix it with ammonia.

Who to call

A mold remediation contractor, once the source is fixed and the size is known

A remediator removes growth under containment. If the water is still running you need restoration first, and if it is in the HVAC you need an HVAC contractor to find the fault.

Also: Water damage. If anything is still wet, or you do not know where the water came from, call restoration first. Questions for that call ›

Get a free shortlist The seven questions for this trade

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What it should cost

$1,223 to $3,757

Typical mold remediation, national average $2,368, or $10 to $25 per square foot

Source: Angi, mold remediation cost, July 2026. View source

National published range, not a quote for your job. The full cost table for this trade is on the mold page.

Ask this contractor, on the phone, before anyone comes out

Tap each one as you ask it.

Did your company also do the testing that found this?
What is the moisture source, and is fixing it inside this price?
What does post remediation verification look like, and who signs it?
Then the seven universal questions: license number, insurance certificate, who does the work, written scope, fees, warranty, start date.

End the call if

Expensive air testing sold before visible mold is dealt with.
A quote written against a 'safe mold level' or a code violation.
The company that tested your home also bidding the removal.

Insurance. Mold is generally covered only when it follows a covered sudden water loss. Gradual leaks and seepage are excluded, and mold from flood is excluded without a flood policy. (Texas Department of Insurance)

Where this comes from

Not my problem, tap through instead Every mold answer