Mold Remediation Cost 2026: $1,500–$3,000 for 100 Sq Ft

Removing mold from about 100 square feet of affected surface in a US house — the area contained, colonized porous material cut out, the air cleaned with a HEPA unit, an antimicrobial treatment applied, and that debris hauled away — often clusters around $1,500–$3,000. That is the typical mold remediation cost. How much does mold remediation cost in that scope? It is the size row below. Mold removal cost, for that same contained job, is the same band. Mold removal cost per square foot is typically $15–$30. Basement mold removal cost for a partial basement is typically $1,500–$6,000, and the typical band is the 100 square foot part of that span. The wider national spread, about $500–$30,000, covers one corner at the low end and a whole house, about 1,000 square feet at $30 a square foot, at the high end. A wet wall is often a basement waterproofing job. Standing water is a sump pump. A damp crawl is crawl space encapsulation. These are typical planning ranges, not a survey and not a quote.

This page is contained mold remediation in an existing single-family house. A bid may call it mold remediation, mold removal, or mold abatement. It is not a drain and a coating on a basement wall, which is the basement waterproofing guide. It is not the liner and the sealed vents, which is the crawl space encapsulation guide. It is not the pump in the pit, which is the sump pump guide. A fogger in an uncontained room, and a test kit with no removal, are different products.

The price of the job is the containment, the removal, the cleaning, and the haul. Square feet of affected surface are the first cut. Access is the second. A per-foot rate is a way to check a row. It is not a second bill. Price the surface you can measure after the crew says what has to come out.

The rows below are ways to read one job. They are not added together. The size table is contained removal on an open surface the crew can reach, at $15–$30 a square foot. The situation table replaces that size row when the job is a bathroom, a crawl space, the HVAC, or a full attic or basement. Use an add-on row only for a line the size row does not include. An inspection the proposal already names is not a second inspection. Drywall the proposal already hangs is not a second wall.

Affected surface	Square feet	Typical cost
A small patch	50	$750–$1,500
One contained area	100	$1,500–$3,000
A larger area	200	$3,000–$6,000
A full room	500	$7,500–$15,000
Whole house	1,000	$15,000–$30,000

Situation	Typical cost
One bathroom	$500–$2,000
Crawl space	$1,500–$4,000
HVAC system or ducts	$2,000–$10,000
Full attic or full basement	$6,000–$15,000

Add-on	Typical planning range
Inspection, when the bid leaves it out	$300–$650
Drywall replacement, when the bid leaves it out	$1.50–$3.50 per sq ft

The situation rows replace the size row. Do not add a crawl-space price on top of 100 square feet, and do not add the HVAC row on top of a full basement. The add-on rows are lines the size row left out. A rebuild the proposal already includes is not the drywall row on top.

About 50 square feet is typically $750–$1,500. Fifty times $15 is $750, the floor. Fifty times $30 is $1,500, the top, and that top is the typical floor. Fifty times $20 is $1,000, inside the row and under the typical band. The whole row except that $1,500 top sits under the typical band. The $1,500 top touches the typical floor and is still 50 square feet. Ten square feet at $15 is $150, under the wider floor of $500. Twenty square feet at $15 is $300, under that floor. A corner the crew still has to contain often lands at $500, which is why a real small visit does not shrink to a closet price. From $500–$750 the job is smaller than this row and stays inside the wider spread. From $750–$1,500 the job is the 50 square foot row. Do not add the 100 square foot row on top of it.

About 100 square feet is typically $1,500–$3,000, and that row is the typical band. One hundred times $15 is $1,500, the floor. One hundred times $20 is $2,000, inside the row. One hundred times $30 is $3,000, the top. Eighty square feet at $15 is $1,200, under the row and inside the wider spread, because an area that has not reached 100 square feet is not the crew this row assumes. The overlap of the size row with the typical band is the whole row. This is the surface the typical band describes: contained, porous material out, HEPA cleaning, antimicrobial treatment, debris hauled. Do not add a per-foot rate on top of this row. The per-foot reading is how the row was built.

About 200 square feet is typically $3,000–$6,000. Two hundred times $15 is $3,000, the floor, and that floor is the typical top. Two hundred times $20 is $4,000, inside the row and $1,000 past the typical band. Two hundred times $30 is $6,000, the top of the row. The overlap with the typical band is the $3,000 floor. From $3,000–$6,000 the job has left the typical band except at that floor, and it stays inside the wider spread. The $3,000 floor is still 200 square feet, not the 100 square foot job. One hundred fifty square feet at $30 is $4,500, inside this row and above the typical band, without being 200 square feet. Do not add the 100 square foot row to this one.

About 500 square feet, a full room of affected surface, is typically $7,500–$15,000. Five hundred times $15 is $7,500, the floor. Five hundred times $20 is $10,000, inside the row. Five hundred times $30 is $15,000, the top. The whole row sits above the typical band. The gap under the floor is real: 200 square feet at $30 is $6,000, and 400 square feet at $15 is also $6,000. Three hundred square feet at $25 is $7,500, the floor of this row, without being 500 square feet. Three hundred times $30 is $9,000, inside the row. A quote of $7,500 should say the square feet. Do not add the 200 square foot row to this one.

About 1,000 square feet, a whole house of affected surface, is typically $15,000–$30,000. One thousand times $15 is $15,000, the floor, and that floor is the top of the 500 square foot row. One thousand times $20 is $20,000, inside the row. One thousand times $30 is $30,000, the top of the row and the top of the wider spread. The overlap with the 500 square foot row is the $15,000 floor. From $15,000–$30,000 the job has left every smaller row except at that floor. Nothing in this row is 100 square feet someone multiplied by ten and then charged ten times for the trip. Do not add the 500 square foot row to this one.

Mold removal cost per square foot

Mold removal cost per square foot is the contained job, not a bottle of cleaner. The size rows use $15–$30. That rate includes the containment, the removal of colonized porous material, the HEPA cleaning, the antimicrobial treatment, and the haul-away of that debris. On 100 square feet, $15 is $1,500 and $30 is $3,000. On 200 square feet, $15 is $3,000 and $30 is $6,000. On 1,000 square feet, $15 is $15,000 and $30 is $30,000.

Hidden growth inside a wall is still square feet once the wall is open. It sits toward the top of the size row and can leave it. It is not a second rate stacked on a row that already priced the opened wall. A species name is not a second table. Black mold and ordinary household mold are two ways a bid can describe one surface. A total stated as $2,000–$10,000 for a black-mold job should name the square feet. Two thousand dollars is inside the typical band, because one hundred times $20 is $2,000. Ten thousand dollars is inside the 500 square foot row and above the 200 square foot top. One hundred square feet at $100 is $10,000, which has left the $30 rate, left the 100 square foot row, and left the 200 square foot row. Ask what that $10,000 includes before you treat it as a species surcharge on a size row you already have.

Drywall replacement, when the bid leaves the rebuild out, is typically $1.50–$3.50 a square foot. One hundred times $1.50 is $150. One hundred times $3.50 is $350. Add this row only when the written price stops at removal and the wall still needs board. On the typical band, removal plus that drywall is $1,650–$3,350. Fifteen hundred plus $150 is $1,650. Three thousand plus $350 is $3,350. The floor of that sum stays inside the typical band. The top has left it by $350 and stays inside the wider spread. A rebuild the hired price already includes is not a second wall. Paint on the new board is a different trade. It is not this row.

An inspection, when the bid leaves it out, is typically $300–$650 for an average-sized house. Add it only when the written price is the removal and the inspection is named as extra. On the typical band, removal plus that inspection is $1,800–$3,650. Fifteen hundred plus $300 is $1,800. Three thousand plus $650 is $3,650. The floor stays inside the typical band. The top has left it by $650 and stays inside the 200 square foot row. A large house can leave $650 and reach $1,000, which stays inside the wider spread. An inspection the bid already includes is not this row on top. A lab sample the same visit already covers is not a second inspection.

Basement, attic, crawl, and ducts

Basement mold removal cost depends on how much of the basement is in the bid. A partial basement is typically $1,500–$6,000. That span is the 100 square foot row through the 200 square foot row. Fifteen hundred is one hundred times $15. Six thousand is two hundred times $30. The typical band, $1,500–$3,000, is the 100 square foot part. From $3,000–$6,000 the partial basement has left the typical band and stays inside the wider spread. A quote of $1,500 on a basement should say whether the affected surface is about 100 square feet or one corner. One corner can sit at $500, the floor of the wider spread. That corner is not the partial-basement row with a discount.

A full basement, or a full attic, is typically $6,000–$15,000. That reading replaces the size row. The $6,000 floor is the top of the 200 square foot row. The $15,000 top is the top of the 500 square foot row and the floor of the whole-house row. Do not add the partial-basement span under this one. A partial attic is the same $1,500–$6,000 reading as a partial basement. Insulation that has to come out can sit toward the top of that span and can leave it into the full-attic row. The crawl space under the same house is not the attic.

A crawl space is typically $1,500–$4,000. That replaces the size row. The $1,500 floor is the typical floor. The $4,000 top has left the typical band by $1,000 and sits inside the 200 square foot row. A crawl at $1,500 and an open wall of 100 square feet at $15 can land on the same dollar. Ask which one the bid is. Access is why the crawl has its own reading. Do not add the 100 square foot row under a crawl price. The liner, the sealed vents, and a dehumidifier are the crawl space encapsulation guide. They are not inside $1,500–$4,000.

An HVAC system or the ducts are typically $2,000–$10,000. That also replaces the size row. The $2,000 floor is inside the typical band. One hundred times $20 is $2,000. The $10,000 top is inside the 500 square foot row and above the 200 square foot top. The floor is a limited system. The top is central air with the ductwork in the job. Do not add the $15–$30 rate under this reading. Do not run the system while the ducts are the project. Air from a moldy air handler is how one room becomes the whole-house row.

A whole house is the 1,000 square foot row, $15,000–$30,000, not a second line under a full basement. A flood that soaks drywall in several rooms is that row when the affected surface is about that size. Carpet, furniture, and a basement waterproofing system are still other bids. The pump that should have kept the floor dry is the sump pump guide.

One bathroom is typically $500–$2,000. That replaces the size row when the job is that room. The $500 floor is the floor of the wider spread. The $2,000 top is inside the typical band, because one hundred times $20 is $2,000, and it is above the 50 square foot top of $1,500. The overlap with the 50 square foot row is $750–$1,500. From $500–$750 the bathroom sits under that row. From $1,500–$2,000 it has left the 50 square foot row and stays inside the typical band. A bathroom with a wet wall behind the tile can leave $2,000. The pipe that caused it is not this row.

What the range includes

The typical band assumes about 100 square feet of affected surface at a single-family house. The area is contained. Colonized porous material comes out. The air is cleaned. An antimicrobial treatment is applied. The debris is hauled. An open 100 square feet at $15 a foot is the $1,500 floor. The same surface at $30 is the $3,000 top. Furniture, in this band, is a simple shift the owner does, or a shift the bid already names.

How long the work takes depends on the square feet, the tear-out, and the access, and the bid’s schedule is the one that counts. A small patch is often a day or less. About 100 square feet is often one to three days. A full attic, a full basement, or a whole house is often longer, and a large job can run about a week. These are typical planning spans, not a warranty.

The floor of the wider spread, near $500, is one corner the crew still has to contain. It is not 100 square feet someone discounted. The top, $30,000, is about 1,000 square feet at $30. It is not the 100 square foot row plus every add-on. One hundred square feet at $3,000, an inspection at $650, and drywall at $350 is $4,000. Three thousand plus $650 plus $350 is $4,000. That sum sits inside the 200 square foot row and under the top of the wider spread. Stacking those lines does not build the $30,000 job. The $30,000 job is the whole-house row.

None of the bands include a new drain or coating, which is the basement waterproofing guide, a liner and sealed vents, which is the crawl space encapsulation guide, or a pump, which is the sump pump guide. A wet wall and the mold on it are two projects. A pit that overflows and the drywall it soaked are two projects. A whole-house chemical termite treatment on that damp wood is the termite treatment guide, often $500–$2,000. The overlap with this typical band is $1,500–$2,000. Fifteen hundred is this typical floor and $1,000 above the termite floor. Two thousand is the termite top and $1,000 under this typical top. Those can be the same dollars and not the same job. Do not fold the waterproofing, the encapsulation, the pump, or the treatment into the remediation price.

Warranties are part of the contract, and this page is not a reading of one company’s form. A remediation warranty, when there is one, is often about the work the crew did, and the term is short. Mold that returns because the wall is wet again, a clearance the bid never included, and a stain on material the crew left in place are questions for that form. Read it. The warranty is not a dollar line in the planning range.

Homeowners insurance and a home warranty are contracts too. A standard homeowners policy is built around sudden and accidental damage. Mold that follows a covered burst pipe or another covered sudden leak is the kind of loss those policies sometimes respond to. Removal is included only as far as the form says. Many forms cap mold or exclude it. Mold from humidity, a basement that was never dry, and a crawl that has been damp for years are the kind of loss those policies commonly treat as maintenance. Read the form before you treat the policy as the budget. A home warranty may name the house and still exclude mold. Neither contract is inside the planning range.

As a cross-check, not a bid: 100 square feet at $15–$30 is $1,500–$3,000, the typical band. One hundred times $15 is $1,500. One hundred times $30 is $3,000. Fifty square feet at $30 is $1,500, one small patch at the top of its row. Two hundred square feet at $30 is $6,000, the top of that row and the top of a partial basement. One thousand square feet at $30 is $30,000, the top of the wider spread. If a bid and that reading are far apart, the bid is a crawl, the ducts, a full attic or basement, an inspection, drywall, or a wall the crew has to open to find the edge.

What moves the price

Driver	How it changes the bid
Size	Fifty square feet is $750–$1,500. About 100 square feet is $1,500–$3,000, and that row is the typical band. About 200 square feet is $3,000–$6,000. About 500 square feet is $7,500–$15,000. About 1,000 square feet is $15,000–$30,000.
Place	One bathroom is $500–$2,000. A crawl space is $1,500–$4,000. The HVAC or the ducts are $2,000–$10,000. A full attic or a full basement is $6,000–$15,000. Those readings replace the size row. A partial basement is the 100 and 200 square foot rows, $1,500–$6,000.
Rate	The open-surface rate is $15–$30 a square foot. Hidden growth sits toward the top of the size row and can leave it. The species is not a second price on top of the square feet.
Inspection and drywall	Both are outside the size row. Left out, an inspection is $300–$650, and a large house can reach $1,000. Drywall left out is $1.50–$3.50 a square foot. A line the bid already includes is not a second line.
The water	A basement that stays wet is the waterproofing guide and the sump guide. A damp crawl is the encapsulation guide. Leaving the leak is how the next bid is the same wall.
Region and access	Labor and disposal vary widely. A high-cost metro can clear the top of the typical band on a straightforward 100 square feet. A tight attic or a crawl the crew has to crawl through is labor, too.

Square feet are the first cut, and they are not a rate times the whole house if only one wall is in the bid. Measure the affected surface. One hundred square feet at $30 is $3,000. Two hundred square feet at $15 is also $3,000. The larger, cheaper surface can cost the same as the smaller, higher-rate one. The crew does not scale in a straight line from a spot the size of a magazine, which is why a real visit often does not land under $500.

Access is the second cut, and it is a substitute, not a stack. An open wall, a bathroom, a crawl space, the ducts, and a full attic or basement are ways to price one job. Adding the 100 square foot row, then the crawl row, then an inspection the bid already named, is how one wall becomes a number nobody can compare.

The same 100 square feet in a lower-cost area and in a high-labor city can sit at opposite ends of $1,500–$3,000 without either bid being wrong. Ask whether the old drywall leaves, and ask whether the inspection is in. A basement that still takes water, a sump pump that has failed, and a crawl space you are closing in the same season are the projects that show up beside this one. Price them on their own pages. Two bids that disagree about the square feet, the ducts, and whether the drywall is in are not the same job.

DIY or hire

Hire the job when the affected surface is past about 10 square feet, when the growth is inside a wall, when the HVAC is in it, or when the space is a crawl. The containment, the HEPA equipment, and the disposal are the job. A weekend clean is most likely to miss the wet edge and to spread what was on the wall into the rest of the house.

A hard-surface spot under about 10 square feet, with the moisture already stopped, can be a careful clean if you will not open the wall to do it. Ten square feet at $15 is $150, which sits under the wider floor of $500. That $500 floor is a hired corner, not the small clean. A spot you have not found the edge of, anything that smells from inside a wall, and any duct are a hire. Wiping a visible stain and leaving the leak is how the 100 square foot row starts.

Do not open a wall to save a service call. If you are pricing containment, a dumpster, and a clearance test, you are pricing a contractor’s job without the crew.

Repair or replace

Clean a hard surface when the spot is under about 10 square feet and the water is already gone. That clean replaces a remediation of those few feet. It is not added to a size row. If the spot is on porous material that is soft, stained through, or still damp, a wipe is the wrong purchase.

Remediate when the colonized material is porous, when the area is past about 10 square feet, or when the growth is in a crawl, an attic, or the ducts. The size row, or the situation row that replaces it, is the price of that removal. A second visit to the same wall, because the first bid stopped at a spray, is still the same square feet. It is not a discount on the first trip.

Fix the water or the remediation does not hold. A basement that takes groundwater is the basement waterproofing guide. A pump that has failed is the sump pump guide. A crawl that stays damp is the crawl space encapsulation guide. Leaving a wet wall to save the $1,500–$3,000 is how the next bid is a larger row. Those projects are not inside the remediation price, and the remediation is not inside theirs.

Leave the remediation when the material is sound and the only project is the leak you have not fixed. New drywall on a wall that is still wet buys a season. How long a cleaned surface stays clean is not a number on this page. The bid’s scope is the work you bought.

How to use this number

Ask two or three remediators for a written price that names the square feet, what material comes out, whether the area is contained, whether the debris is hauled, whether an inspection is included, whether drywall is included, and what happens if the edge is past the first opening. Compare about 100 square feet of contained removal with $1,500–$3,000. Compare the size with $750–$1,500 for 50 square feet, $1,500–$3,000 for 100, $3,000–$6,000 for 200, $7,500–$15,000 for 500, and $15,000–$30,000 for 1,000. Compare a bathroom with $500–$2,000, a crawl space with $1,500–$4,000, the HVAC with $2,000–$10,000, and a full attic or full basement with $6,000–$15,000. Keep the haul inside those rows. Put a left-out inspection at $300–$650 and left-out drywall at $1.50–$3.50 a square foot on their own lines.

A very low bid on 100 square feet is a reason to ask whether containment and haul-away are included, not a reason to celebrate. A quote near $500 should say one corner, not a wall and a ceiling. A high bid should point at square feet, a crawl, the ducts, a full attic or basement, an inspection, drywall, access, or the labor market. Two or three local bids on the same surface, the same tear-out, and the same haul-away are the number that matters. How this site sets the band is explained on the methodology page.