Mold remediation
Somebody wants to sell you an air test. Read this first.
Mold work is the easiest home repair to be oversold. Here is what it actually costs, the conflict of interest to watch for, and a free call to a licensed local remediation contractor.
BestHonestPro is a free comparison resource, not a contractor. There is nothing to sign up for and we do not sell your details. When we begin connecting callers to contractors, we will be paid a referral fee by the contractor, never by you, and this line will say so.
Published cost ranges
What mold remediation should cost
These are national published ranges, not a quote for your job. Use them to judge whether the number in front of you is in the right ballpark.
National average $2,368. Typical range $1,223 to $3,757, or $10 to $25 per square foot.
| Bathroom | $500 to $1,000 |
|---|---|
| Basement | $500 to $3,000 |
| Attic | $1,000 to $4,000 |
| Crawl space | $500 to $2,000 |
| HVAC system | $3,000 to $10,000 |
| Whole house | $10,000 to $30,000 |
Source: Angi, mold remediation cost, updated July 2026. View source
What moves the price
- Affected area. The EPA treats about 10 square feet, roughly a 3ft by 3ft patch, as the line above which you want a professional.
- Where it is. An HVAC system runs $3,000 to $10,000 against $500 to $1,000 for a bathroom.
- How much has to come out. Surface cleaning is cheap. Cutting out drywall, insulation and subfloor is not.
Insurance. Mold is generally covered only when it follows a covered sudden water loss. The main exclusion is mold from gradual leaks or seepage, and mold from flood is excluded entirely without a flood policy. (Texas Department of Insurance)
Or have us do the legwork
Tell us the job. We will do the checking and send you the shortlist.
Free, and there is nothing to buy. A few taps, and you get the same research we would do for ourselves, written down.
Got it. The clock has started.
We will come back to you within one business day at the email you gave. If it is not there, check the spam folder before assuming we forgot.
What comes back to you
Up to three names we would call ourselves
Licensed for your state and trade, checked on the state board the day we send it, with the licence number so you can check it too.
What we verified on each one
Licence status and classification, how long the business has been registered, and whether anything shows on the state board or attorney general. If something looks wrong, we say so.
What your job should cost where you live
The published national range narrowed with what we can find for your area, so the first quote has something to sit against.
The questions to ask them, for your job
The same seven on this site plus the ones specific to your trade, in the order to ask them.
What this is not. We are not inspecting your property and we are not standing behind anyone's work. This is desk research done properly and handed to you, nothing more and nothing less.
Step one
Where to get your three names
Telling you to compare three contractors is useless if you only have one. These are the five places the three names actually come from, in the order we would use them. None of them involve us.
Your state licensing board
Every US state runs a free public search of licensed contractors, and most let you filter by trade and county. Starting here means all three of your names are licensed before you dial, which removes the single most common problem in one step.
The supply house
Call the plumbing, roofing or HVAC supply counter nearest you and ask who they would use. They know exactly who pays their bills on time and who does not, they have no stake in your job, and almost nobody thinks to ask them.
Maps, filtered properly
Search the trade plus your town, then keep only businesses with a real street address, a landline, and photographs of actual work. Skip anything with a stock photo and a mobile number only, which is what a lead broker looks like.
Your insurer, if a claim is involved
Most carriers keep a preferred contractor list. Use it as one of your three, not as the only one: the list is chosen partly for the carrier's convenience, and your interests and theirs are not identical.
The neighbour with the same problem
The most reliable source there is, and the least scalable. If someone on your street had this exact job done in the last two years, that is your best single name.
Your three calls
Call three. Ask all of them the same seven questions.
You cannot tell an honest contractor from a dishonest one by looking, and neither can we. What you can do is ask every one of them the same things in the same order, and watch where the answers stop matching. That is a comparison you can run yourself in twenty minutes, and it is worth more than anybody's badge.
Are you licensed for this work in my state, and what is your licence number?
Can you email me a certificate of insurance for general liability and workers compensation?
Who actually does the work, your own employees or subcontractors, and are they covered by your policy?
Will you put the scope in writing before any money changes hands, including what is NOT included?
What is your call-out or diagnostic fee, and does it come off the job if I go ahead?
What is your workmanship warranty in years, and is that yours or the manufacturer’s?
When can you start, and what is the most likely thing that would delay it?
Then the ones that only matter for this job
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?
Ask all three the same questions in the same order. The spread in the answers tells you more than the spread in the prices. Two quotes cannot tell you who is wrong. Three can.
The comparison sheet
Screenshot this, or copy it onto paper before you dial. Fill one column per contractor while you are still on the call, never afterwards from memory.
Swipe the table sideways to reach columns two and three.
| Pro 1 | Pro 2 | Pro 3 | |
|---|---|---|---|
| Licence number (and did it check out) | |||
| Certificate of insurance received | |||
| Own crew or subcontractors | |||
| Written scope, with exclusions | |||
| Call-out fee, credited or not | |||
| Workmanship warranty, in years | |||
| Earliest start date | |||
| Total price |
Before you say yes
Five things to check yourself
You can verify all five without a single phone call to us. That is the point. An honest contractor will hand you every one of these without being asked twice.
State mold licence, where your state requires one
Florida licenses mold assessors and remediators separately under chapter 468. Texas licenses assessment consultants and remediation contractors under 16 TAC chapter 78. Ask which licence they hold and look it up.
That the tester is not the remover
Florida law bars a mold assessor from remediating a structure they assessed in the last 12 months, and from taking any payment or reward from a remediator for a referral. Where your state has no such rule, apply it yourself.
IICRC AMRT or Certified Firm status
Check it on the IICRC Global Locator and ask that the work follow ANSI/IICRC S520, the accredited mold remediation standard.
A written protocol and post-remediation verification
In Texas the licensed consultant and contractor jointly sign a Certificate of Mold Damage Remediation, which the owner must receive within ten days of the stop date, with before and after photographs.
That the moisture source is found and fixed
The EPA is direct about this: there is no practical way to eliminate all mold indoors, so the way to control it is to control moisture. Remediation without a moisture fix is a repeat visit.
Warning signs
Three things that should end the conversation
Each of these is documented by a regulator, a state agency or a consumer protection body, not by us.
Expensive air testing sold before visible mold is dealt with
EPA: in most cases, if visible mold growth is present, sampling is unnecessary.
A quote written against a safe mold level or a code violation
EPA: no threshold limit values for airborne mold have been set, there are no federal standards for airborne mold contaminants, and sampling cannot be used to check compliance with standards that do not exist.
The company that tested your home also bidding the removal
Florida bans this outright for licensed assessors. It is the arrangement that most reliably inflates a mold job.
Why waiting costs more
The 24 to 48 hour rule is a drying deadline, not a mold clock. The EPA and CDC both say to dry or remove wet items within 24 to 48 hours to prevent mold growing, and the EPA adds that growth will not always occur after 48 hours, this is only a guideline.
Source: US EPA and CDC. View source
How this works
Free for homeowners. No sign-up, nothing to buy.
Know the number first
Every page publishes the national cost range for that job with its source named and linked, so the quote in front of you has something to sit against.
Call three, ask the same seven things
The questions are written out, in order, with what a real operator says and what the tell sounds like. Fill the comparison sheet while you are on the call.
Verify it yourself, in five minutes
Licence number on the state board, certificate of insurance from the insurer, written scope with the exclusions named. Nobody has to take our word for anything.
Three names, seven questions, five minutes of checking
That is the whole method, and you can run it this afternoon without us.
BestHonestPro is a free comparison resource, not a contractor. There is nothing to sign up for and we do not sell your details. When we begin connecting callers to contractors, we will be paid a referral fee by the contractor, never by you, and this line will say so.