Mold Remediation Cost in St. Louis: What You Will Pay

How much does mold remediation cost in St. Louis?

AES says prices typically range between $1500 to $10,000 for a home which is showing visible signs of mold. AES also says 1 to 5 days is the normal timeframe expected to complete most average jobs. Angi, a third-party site, reports an average of $2,341 for St. Louis, with a range of $1,231 to $3,492 or more.

Those numbers look far apart. They are not in conflict. They answer different questions, and the next section explains how.

Angi and ATI Restoration figures are third-party numbers, not AES prices. AES quotes each job; call (314) 865-2662 or use our contact page.

Why do AES and Angi show different numbers?

They measure different groups of jobs. AES describes a home that already shows visible mold. Angi gives an average across the jobs it tracks. Neither figure is a quote for your house, and neither source claims to be.

Read the two together. Angi’s average tells you where a typical St. Louis job lands. AES’s range tells you how far a home with visible growth can run when the problem is bigger than a small patch. Angi’s own range ends with “or more,” which admits that some jobs go past its top number. Angi also lists a whole-house infestation at $10,000 to $30,000, which sits at or above the top of the AES range.

A third point matters more than either number. A low price only helps if the quote covers the whole job. A cheap quote that cleans the surface and skips the source, the damaged material or the containment is not the same product as a full quote. You compare scopes, not totals.

Does the St. Louis climate change the odds of mold?

Yes, it raises them. Angi says the humid climate in St. Louis makes homes susceptible to mold growth, warranting additional preventative measures. The same page says the type of mold, its location and the size of the infestation are the main factors that set a St. Louis price.

Moisture is the trigger. Basements are the common place to look first, so read our mold in basement page and our post on whether all basements have mold. Our post on how fast water damage must be dried gives the drying timeline.

What sets the price of a mold job?

AES says the cost depends on the severity of the mold problem, what materials are affected and the size of the contaminated area. Those three drivers also set the schedule. Hidden growth and the water source often decide the final number.

Labor is the biggest line. This Old House says labor typically accounts for the majority of the total cost, often more than half of the overall price. The water source deserves a second look. Mold needs moisture. If a contractor removes the mold and nobody fixes the leak, the next quote is the same quote again.

Read the longer breakdown in our mold remediation cost and timeline guide and the mold remediation costs page.

What does a mold inspection cost, and do I need one first?

Angi reports that a mold inspection costs between $300 and $1,075. ATI Restoration says $200 to $600. AES does not publish an inspection price. The figures differ by source, so treat them as a range of what St. Louis buyers see, not a fee.

You may not need a separate test if the mold is plainly visible. You do want someone to find out how far it spreads before anyone prices the job. A stain on a basement wall may be the visible edge of growth that runs behind the drywall. Without an inspection, the first quote often changes once crews open the wall. Our post on mold inspection cost covers what drives that price.

Ask three things before you pay for one.

1. Does the same company inspect and remediate?
2. Is the inspection credited against the job?
3. Does the report show the affected area in square feet?

A clear scope makes every later quote easier to compare. See the mold inspection page for how AES approaches it.

Will insurance pay for mold remediation?

Sometimes. ATI Restoration says that if mold growth is due to a natural disaster or unexpected emergency, many homeowners are able to request mold remediation through the insurance company. A slow leak you ignored is a different case. The cause decides the answer.

Call your insurer before work starts, and ask what paperwork they need. Photos of the damage and the water source help. If you rent or you are buying, the question changes. Read our post on who pays for mold remediation, buyer or seller and our guide for mold in St. Louis rentals.

Can I clean the mold myself and skip the cost?

Sometimes, for a small patch. EPA says that if the moldy area is less than about 10 square feet, roughly a 3 foot by 3 foot patch, you can in most cases handle the job yourself. If there has been a lot of water damage, or mold covers more than 10 square feet, EPA points you to professional guidance.

Our post on mold over 10 square feet walks through that line. Three limits apply to the do-it-yourself path.

1. Fix the water problem first. Cleaning mold without fixing the source only buys time.
2. Porous material such as carpet and ceiling tile may have to be thrown away, per EPA. Scrubbing will not save it.
3. If the water was sewage or other contaminated water, EPA says to call a professional.

If you can see more than a 3 foot by 3 foot patch, or you smell mold and see none, plan for a professional estimate. Guessing at hidden growth is how a small problem turns into a larger one.

How do I compare two or more mold quotes?

Ask each contractor to put the scope in writing, then compare the lists line by line. This Old House suggests at least three local estimates, and it says to watch out for bids that charge substantially more or less than others. Use the same checklist on every quote.

1. Area. Does the quote name the rooms and the square footage?
2. Source. Does it say who finds and fixes the moisture?
3. Containment. Does it describe a sealed work area? Our glossary explains containment and negative air machines.
4. Material. Does it say what gets removed and what gets replaced?
5. Timeline. Does it give a number of days, and does that match the 1 to 5 days AES describes for most average jobs?
6. Testing. Are inspection and post-remediation testing included, billed separately or missing?

AES says remediation should happen in a confined area that uses negative air flow and commercial grade antimicrobials. Ask any contractor you consider how they control the spread of spores during the work. The answer tells you more than the price does.

Next step

Send AES the address, a few photos and a note about where the water came from. AES quotes each job; call (314) 865-2662 or use our contact page. The mold remediation page lists what the crews do on a job, and the mold remediation FAQs cover the rest.