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How Much Does It Cost to Do a Mold Inspection?

Average Cost
(inspection for a 2,500 sq. ft. home with two lab tests)

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How Much Does It Cost to Do a Mold Inspection?

Average Cost
(inspection for a 2,500 sq. ft. home with two lab tests)

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Mold inspection 1 is one of the most important steps for keeping your family members healthy inside your home. Mold spores in a home are linked to serious medical issues, such as respiratory distress, asthma, and increased allergy symptoms. Mold inspectors perform professional tests to confirm the presence of mold in a residence and propose remediation strategies.

The average cost of a mold inspection is $400-$800, with the average customer paying around $500 for a walkthrough inspection of a 2,500 square foot home, two samples, and laboratory testing.

Mold Inspection

Mold inspection
National average cost$500
Average range$400-$800
Minimum cost$300
Maximum cost$1,000

Updated: What's new?

Mold Inspection Cost by Project Range

Inspection for a 1,000 sq. ft. home with two lab tests
Average Cost
Inspection for a 2,500 sq. ft. home with two lab tests
Inspection for a 3,500 sq. ft. home, two lab tests, and drywall removal for testing purposes

Mold Inspection Cost by Type of Mold

There are varying types of mold that can be found within the home. Some molds may cause mild allergic reactions, while others can produce toxicity to those exposed, such as black mold. Most mold inspections cost a standard price while toxic forms are at a slightly higher price point due to the increased need for safety equipment. The following average prices reflect the cost of inspection for 2,500 square feet with two lab tests.

Type of MoldCharacteristicsHealth Issues




40 different species

Greenish blue coloring


Hay fever




Type of fungus

Airborne spores

Blue-green or gray coloring

Difficulty breathing

Lung infections

Sinus infections




Airborne and found on soil and water surfaces

Black and yeast-like in appearance







Airborne and found in soil and plant matter

Dark olive brown color

Allergic reactions

Upper respiratory infections

Brain abscesses (rare)




Indoor and outdoor spores


Olive green and dark brown color

Sinus infections

Allergic reactions

Asthma attacks



Toxic potential

Common in crops

Light pink, white, or gray color

Toxic if certain species are ingested






More than 350 species

Some forms produce penicillin used in medicines

Green color in bunches


Shortness of breath

Stachybotrys Chartarum


Toxic potential

Known as black mold

Black color with green spots

Grows under moist conditions

Extremely toxic potential in sensitive and immune compromised individuals

Dermatological, respiratory, and eye illnesses can occur

Serpula Lacrymans



Grows on wood as dry rot

Brown color

Skin irritation



Toxic potential

Present in soil

Light green color

Lung infections

Asthma Attacks

Allergic Reactions




Present in plants and spoiled foods

Dark brown and black color


Allergic Reactions

Respiratory distress

Mold Inspector Costs

Housemold inspections should always be done by a professional. Due to poor accuracy levels, DIY mold testing kits are recommended against by numerous consumer advocacy agencies, including Consumer Reports.

A basic inspection by a mold remediation specialist involves reviewing potential spots of mold growth in the home, pinpointing moisture control issues, and suggesting a remediation plan. The inspector can offer advice on how to stop future mold growth by fixing plumbing issues such as leaking pipes and faucets or damaged sealing around bathroom fixtures. Roof leaks and other structural problems need to be resolved, too, to fix a mold problem.

On average, a mold inspection takes one hour to complete. For larger homes, the inspection could last as long as two hours. Mold testing samples are usually overnighted to a laboratory with results available in one to three business days. Typically, hourly rates are not charged by mold inspectors, but a charge may be implemented based on how many samples are collected and tested. Two samples are usually included in the base charge of $300 to $700.However, each additional sample is subject to a fee between $60 and $80. Costs may vary from state to state, but since inspections are a widespread service, rates are usually standard in most areas.

When To Do a Mold Inspection

Mold inspections are required when the homeowners suspect mold is impacting areas of their home. You could also decide to inspect for mold before buying or selling a home. Mold inspections are also important as part of water damage restoration services. Although you should always have an inspection when you see visible mold, inspections are also recommended in many other cases. The following are the most frequent reasons to arrange a mold inspection.

  • New home purchase. Although brand new construction projects are not likely to have a mold or excess moisture problem, an older home or residence that has been occupied for a prolonged period requires a mold inspection. If you are planning to sell an older home, you should also book a home inspection with a mold check.
  • Leaks. If you have experienced leaks currently or in the past, it’s important to arrange for a mold inspection in your home. Leaks could have occured from the roof, pipes, or slab.
  • Wood. Any type of wood structure with visible dry rot is prone to mold growth and should have an inspection.
  • Moisture buildup. Mold grows in extremely damp areas. If you have any condensation within the home, on your windows, flooring, or doors, then mold could become a problem.
  • Post-flood. Flood cleanup services should include both mold inspection and mold remediation before the building is once again occupied.
  • Visible mold. If you see mold growth anywhere on the walls, ceilings, and floors of the home, arrange a mold inspection. Often, mold has a slimy or fuzzy appearance with different coloring. Common colors associated with mold growth are white, green, blue, black, and gray.

Prep Work Before Mold Inspection And Testing

Before an inspector arrives, you should take steps to improve accessibility. In addition, the inspector performs many of the steps needed to test mold samples, but the service agency may ask you some initial questions before your appointment. To prepare for your service visit, complete the following tasks:

  • Inspect your home for rooms that are showing signs of elevated moisture levels so you can point those out to the inspector.
  • Move around any furniture in a room or multiple rooms that block wall and/or floor areas that the technician needs to inspect.
  • Remove any soft furnishings and floor coverings that could be hiding mold. This includes throw rugs. If mold is suspected due to a flood, you should arrange for a cleanup service crew to remove any wet carpeting.
  • Pull out any appliances that may have hidden mold behind them, like your refrigerator.
  • Clear away any tools and cleaning supplies in cabinets that the inspector is likely to check like underneath sinks.
  • Dispose of any cardboard boxes or newspaper piles that have been collected in areas where mold is suspected.

Mold Inspection Process

An inspection by a service professional involves confirming that mold is present in the home. During the inspection, a complete walkthrough of the basement, living floors, and attic is done to note any problematic areas. The inspector searches for visible mold spores and also evaluates any areas with high humidity, such as the basement, kitchen, and bathrooms. The inspector may rearrange furnishings to check for hidden spots where mold is thriving. Attics, crawlspaces, HVAC vents, and even behind drywall 2 may be examined during a mold inspection appointment. The inspector notes visible mold growth, as well as any areas with the mildewy scent of mold. Mold damages wood and other building materials it grows on, so the inspector will report any construction problems found related to the mold. In some cases, the inspector may need to damage a small area of drywall to inspect for mold. In addition to checking for mold, inspectors evaluate the areas for potential water sources contributing to mold growth.

For professional mold testing purposes, an inspector takes a sample of mold spores found within the air or surface areas. The spores are then sent to a laboratory to analyze both the type of mold and its potential for growth in the area. The mold counts are also calculated, which are very important in determining if spore levels are elevated inside the home when compared to outdoor levels.

Mold Air Testing

Mold air testing involves sampling air particles to determine if mold spores are present which are not visible to the naked eye. Inspectors can use different types of devices for mold air testing. Mold air sampling devices include cassette sampling, air pump sampling, and particle collector sampling. Cassette sampling traps spores in a plastic cassette to send out for lab analysis, with an average inspection and testing price of $500. Air pump 3 sampling uses a calibrated air pump to force mold spores onto slides and costs an average of $600 for the inspection and test. Particle collectors trap spores directly onto a petri dish for analysis and has an approximate testing and inspection cost of $700.

Professional Mold Testing

After the inspection, there are three different methods service professionals have available to them for testing. Mold testing is typically ordered at multiple intervals. For instance, a mold inspection and testing is usually done again post-remediation. That test determines if spore counts have decreased significantly since treatment.


Staining is the most popular type of mold testing done by professionals. Mold spores are trapped from the air or taken from the surface of an affected area. Air samples are taken in plastic cassettes, while surface samples are derived from swabs or tape lifts. At the laboratory, stains that mold can absorb are added to the samples as a way to determine the type of spores, counts, and growth patterns.


In this type of laboratory test, mold cultures removed from a home or business are grown within sterile conditions. Larger mold colonies help determine the type of mold and growth rates. Only live mold samples are able to be grown in a laboratory. However, dead mold spores can still cause health problems.

HVAC Testing

A specialized test done for mold inspection jobs is evaluating the potential for mold in HVAC systems. When mold is located within the ductwork of a home, residents may have unexplained allergy symptoms. Common symptoms related to mold including wheezing, runny nose, itching in the eyes and throat, and frequent headaches. A blend of testing protocols are done to check for mold in a HVAC system. First, air samples are collected by the inspector, followed by samples collected through tape. Tape samples are collected from the ductwork and filter of the HVAC system. Particles are measured in the laboratory along with stain applied for analysis.

Black Mold Testing and Inspection

Black mold testing is very important to schedule if you suspect this toxic mold could be found in your residence. Black mold tends to form on structural surfaces such as drywall, carpets, insulation, and concrete. Any type of porous surface that was exposed to long-term moisture could form toxic black mold. Toxic black mold’s scientific name is stachybotrys chartarum and it particularly impacts the respiratory system. Chronic coughing, sneezing, fatigue, rashes, and headaches could indicate toxic mold exposure. Quick remediation is important to protect the health of any family members adversely affected by the mold.

Basements, crawlspaces, bathrooms, and kitchens are common areas that may need to be inspected for black mold. Due to the toxic nature of the mold, professionals may charge slightly more to inspect and test for these types of spores. Black mold testing and inspection will cost the average homeowner $700.

Mold Inspection Cost Factors

Cost factors are determined by the type of mold found present in the home, the size and accessibility of the service area, and what type of services are needed to complete the job. For instance, testing and inspection services are a separate cost from remediation appointments. A remediation specialist will charge upwards of $1,500, while an inspection usually costs around $500.

The size of the house is the largest determinant in the cost for a mold inspection. A smaller home measuring less than 1,000 square feet will cost around $300, while a larger home measuring more than 3,500 square feet costs upwards of $700.

If any type of construction work is required to perform a mold inspection test or accessibility becomes an issue, then the cost increases. The amount of drywall or construction materials which need to be removed determines the final cost of the test. For instance, if you are paying $500 for an inspection, two lab samples, and a report on a 2,500 square foot home, you can expect to pay an extra $16-$20 per square foot of drywall removal.

Find a Good Mold Inspector

To find a good inspector, take the time to review the company’s background and qualifications. Consider the following points before signing an inspection contract:

  • Licensing and certifications. There is no official licensing body governing mold inspectors. However, home inspection organizations provide certifications to ensure inspectors meet industry standards. The International Association of Certified Home Inspectors provides a comprehensive certification program for mold inspectors.
  • Years of experience. Ask the inspection agency about their business’ history. How many years have they been operational? Is each technician trained and certified before performing inspections? Ask about any references they are able to provide.
  • Removal capabilities. Inspection agencies for mold frequently offer removal services, too. In fact, if mold is visible you can save time and money by hiring a company that provides inspection, testing, and remediation.
  • Recommendation process. Inspectors provide a detailed report and should include referrals for remediation firms. If plumbing or construction issues are causing mold to thrive, the company may refer you to local repair agencies or builders.

What to Do After Mold Inspection

Your response to a mold issue depends on the test results. If mold is found and spreading through the home, a plan of attack should be outlined. In cases that mold isn’t a problem, a watch and wait strategy is best.

  • Review your detailed report to see what type of remediation strategies are recommended. After removal, there is likely to be a recommendation for re-testing.
  • Seek out assistance from plumbers, repair service companies, or builders if leaks are causing the mold to form. Humidity levels may also be contributing to the mold problem in your home. Dehumidifiers and other devices may be needed to reduce the humidity level in areas like the basement.
  • Cleanup operations are done by certified mold remediation specialists. Removing mold is dangerous to your health and can trigger allergic reactions and asthma attacks. Specialists use biohazard masks and gloves to protect them during remediation of your mold problem.

Enhancement and Improvement Costs

Damage Repairs

Mold will damage wood, flooring, drywall, paint, and other building construction materials. After removal of the mold and stopping any type of water exposure that could be leading to mold growth, any repairs can be made. The damaged building materials typically require complete removal and replacement due to concerns of structural soundness. As an example, minor drywall repair can cost around $180, while fixing a water main break is upwards of $800. Contact a local contractor to receive quotes on projects.

Replacement of Furniture and Flooring

Any type of soft furnishings typically need replacement due to mold exposure. It’s extremely difficult to completely remove mold spores from any type of fabric with a porous surface. Remove any type of carpet, area rugs, soft bedding materials, cushions, pillows, and more if you suspect mold exposure. Replace the items after mold remediation efforts are done. Carpet installation jobs usually start at $980, while couch reupholstering work is a minimum of $850.

Additional Considerations and Costs

  • Mold removal professionals may advise against an inspection alone if mold is visible. In these cases, the professional could recommend immediate removal and cleaning of the affected areas in the home.
  • DIY inspections are never recommended. Homeowners may not think to check all the required areas to confirm if mold is present or not in the residence. Also, DIY kits have questionable reliability.
  • Prevent future mold outbreaks by monitoring humidity levels in the home. The ideal relative humidity level should fall between 40 and 50 percent based on readings from a hygrometer. If your area experienced a major flood, arrange for cleanup services from a professional agency. Keep humidity levels stable by having all rooms properly ventilated and using a dehumidifier as needed.
  • Remember to take steps to avoid water seeping into the home from the foundation. Divert rainwater away from your home to avoid water accumulation by sloping the yard. Rain gutters are also helpful in controlling how dry your home remains. Remember to maintain the gutters and have them cleaned on a regular basis. Repair any leaks promptly and replace rotted wood immediately to decrease the chances of mold growth.
  • Extra fees may be added for tests in hard to reach areas. For instance, HVAC mold inspection and testing is likely to cost at least $1,500.
  • House mold inspections and remediation may be included in some homeowner insurance plans. However, the mold must have occured due to a covered peril on the policy, such as floods or storms, though flood insurance is almost always a separate policy from standard homeowners insurance.


  • Are mold inspections free?

Mold inspections are not free, but companies may include the service with a remediation appointment. The average cost​ is $500 for mold inspection of a residential building.

  • Who inspects for mold in houses?

Certified mold inspectors are hired to check for mold in the home. Home inspection agencies may also have contractors who perform this service.

  • What are signs of mold in your house?

Warning signs you have a mold problem include visible mold and a musty or mildewy smell. Mold on the walls and floor look slimy and/or fuzzy with different colored spots, including white, black, blue, or green. Unexplained allergic reactions may also be a sign of mold in the house.

  • Is mold covered by homeowners insurance?

Mold removal is usually covered by homeowners insurance if it resulted from a covered peril listed on your policy. For instance, if you have flood coverage and mold occured due to a flood, you may be able to file a claim.

  • Can I have my apartment tested for mold?

Any type of home or business can be tested for mold, but renters should check with landlords before ordering the inspection and test.

  • How do you know it's black mold?

Black mold isn’t always solid black and could have green spots in it, too. Black mold has a dirt and damp odor. However, professional lab tests confirm if it’s truly black mold.

  • What does mold smell like in a house?

Mold has a mildew odor that smells like laundry that has been left in the wash for several days.

  • What do professionals use to kill mold?

Professionals use antimicrobial cleaning products to remove mold from an area. The remediation team may also seal the area to protect it from recurrences.

  • Is it safe to stay in a house with black mold?

Black mold is toxic to some, but not deadly to most. However, you may want to steer clear of areas of the home with black mold until the area is cleaned and sterilized.

  • Should you buy a home with mold?

Mold is able to be removed and controlled and doesn’t make a house uninhabitable on a permanent basis unless a widespread problem is on site.

  • Do air purifiers help with mold?

Air purifiers with HEPA filters can be useful in removing mold spores from the air.

  • How do you know if mold is in the walls?

Mold may or may not be visibly growing on the walls of the home. However, you may want an inspection if the room has condensation on the windows or walls.

  • Is it legal to sell a house with mold?

You are legally able to sell a home with mold as long as you disclose to buyers that mold is present within the residence.

  • Can a home be condemned for mold?

A home can be condemned for mold, but the incidence is rare. As long as mold issues are remedied before the problem spreads, a home can still be safe for occupants.

Remodeling Terms Cheat Sheet

Definitions in laymen's terms, cost considerations, pictures and things you need to know.
See full cheat sheet.
1 Mold inspection: An assessment of the mold levels in a home. It can be carried out by a qualified professional, or it is also possible to test for mold with a kit sold at a home improvement store
glossary term picture Sheetrock 2 Drywall: Type of plasterboard, commonly used to build walls and ceilings, composed of gypsum that is layered between sheets of heavy paper
glossary term picture Pump 3 Pump: A device used to move air, liquid, or gas by mechanical means

Cost to do a mold inspection varies greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.

The information provided by our cost guides comes from a great variety of sources, including specialized publications and websites, cost studies, U.S. associations, reports from the U.S. government, contractors and subcontractors, material suppliers, material price services, and other vendor websites. For more information, read our Methodology and sources.
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Cost to do a mold inspection varies greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.

The information provided by our cost guides comes from a great variety of sources, including specialized publications and websites, cost studies, U.S. associations, reports from the U.S. government, contractors and subcontractors, material suppliers, material price services, and other vendor websites. For more information, read our Methodology and sources.