How Much Does It Cost to Do a Mold Inspection?

Average range: $400-$800
Average Cost
(Inspection of 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 range: $400-$800
Average Cost
(Inspection of a 2,500 sq. ft. home with two lab tests)

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A mold inspection is essential for your family’s health and well-being. Mold is a fungus and requires moisture to grow and flourish. Even in small quantities, the mold spores can quickly become airborne in the home and lead to health problems (especially of the respiratory tract) for the inhabitants. The mold can spread and cause extensive structural damage. This situation requires repairs and mold remediation.

The national average cost of a mold inspection ranges from $400 to $800, with most people paying around $500 to inspect a 2,500 square foot home, obtain two samples, and conduct laboratory testing. Typically, the price depends on the home’s square footage and how many mold samples are obtained. At the low end of the spectrum, you pay $300 for a 1,000 sq.ft. home, one sample, and laboratory testing. At the high end, you can expect to pay $1,000cfor a larger home, two samples, laboratory testing, and drywall removal for testing purposes.

Mold Inspection Costs

Mold Testing Costs
National average cost$500
Average range$400-$800
Minimum cost$300
Maximum cost


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Mold Inspection Cost by Project Range

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

Mold Inspection Cost by Type of Mold

Various types of mold are found within the home. Some molds cause mild allergic reactions, while others produce toxicity to those exposed, such as black mold. Most mold inspections cost a standard price, while toxic forms are slightly higher 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.

Below is a table showing the various types of mold and how much it costs for an inspection. The mold specialist cost varies based on the mold variety. Different lab tests are needed to identify the mold type correctly and are factored into the mold inspection price.

Mold Inspection Cost by Type of Mold

Mold Inspection Cost by Type of Mold

Mold TypeCost (Labor and Testing)
Serpula Lacrymans$500
Stachybotrys Chartarum$700

Alternaria Mold

There are 40 varieties of Alternaria mold. Typically, it occurs outdoors during the spring and summer months and accounts for major plant damage on trees and bushes. When the mold spores become airborne, it quickly spreads both outdoors and indoors. The spores may settle on your clothing, furniture, and houseplants. The spores also invade the area beneath carpets, basements, showers, attics, and the interior of walls. In a home with high humidity, the mold starts to grow. It can cause the inhabitants of the home to suffer from allergies, asthma. In some cases, it may lead to esophageal cancer. Cold-like symptoms may occur after exposure, such as sneezing, fatigue, headache, runny nose, throat irritation, and watery eyes. Skin rashes and itching can occur. The cost of Alternaria mold inspection averages $500.

Aspergillus Mold

There are 250 species of Aspergillus mold. It starts as a white fungal growth and quickly turns brown, black, yellow, and green (the hue changes depending on the species). The spores are spread via the air both indoors and outdoors. Unlike some types of mold, Aspergillus grows well in relatively low humidity and invades doors, windows, walls, pillows, and carpets. Exposure to Aspergillus mold may lead to Aspergillosis, a form of a respiratory infection that can spread throughout the body. The fungus forms fungal balls inside the body cavities such as the lung. Sufferers experience fever, coughing, chest pain, and shortness of breath. Treatment consists of the administration of antifungal medications. An Aspergillus mold inspection costs $500.

Aureobasidium Mold

Aureobasidium mold grows on painted or wooden surfaces. It can also occur behind wallpaper. The mold forms a pink, brown, or black color. At maturity, it develops into a dark brown. Exposure to the mold species can cause infections of the eye, nails, and skin. Dermatitis may occur if your bare skin comes into contact with the mold. The cost of Aureobasidium mold detection averages $500.

Chaetomium Mold

Chaetomium mold develops into white fuzzy growths that eventually form a bluish-green coloration. The spores appear dark brown and are shaped like a tiny football. They spread through the air and often grow in cellulose-rich material such as drywall, wood, or ceiling tiles. Several species of Chaetomium mold can be carcinogens. They may cause skin and nail infections. On rare occasions, the spores may lead to brain infections. Mold inspection averages $500.

Cladosporium Mold

Cladosporium mold is a common mold that thrives in damp basements, bathrooms, attics, and near HVAC systems. Exposure to the mold might not cause any symptoms in some individuals. However, others may experience sneezing, dry skin, coughing, postnasal drip, watery eyes, itching throat, and stuffy nose. A severe allergic reaction may lead to a feeling of tightness in the chest, wheezing, and difficulty breathing. The cost of mold detection for Cladosporium averages $500.

Penicillium Mold

Penicillium mold appears blue and green and has a velvety texture. This mold type often occurs in water-damaged homes on wallpaper, ducts, carpets, and mattresses. It spreads quickly in the home. Certain individuals may experience an allergic reaction, which may cause pulmonary inflammation and asthma. Some individuals may also experience chronic sinusitis. Penicillium mold is used to create a potent and historic antibiotic, but many people are allergic to the species. The cost of mold detection averages $500

Trichoderma Mold

Trichoderma mold is what is known as a filamentous fungus that grows naturally on plants, in soil, and wood. Once the spores take hold, the fungi divide rapidly. The Trichoderma species spreads indoors and concentrates on various building materials with a high cellulose content such as fabric, wood, and paper. This variety of mold often infiltrates the home’s HVAC system. The colonies of mold appear white or cream-colored. Susceptible individuals may start to sneeze and cough when exposed to the species. Mold detection and lab testing average $500.

Ulocladium Mold

Ulocladium mold appears dark. It occurs on paper, paint, wood, and textiles. Usually, it grows best in homes that have sustained extreme water damage. You’ll notice the mold around windows that suffer extreme condensation and in basements and kitchens. It is not uncommon for the mold to grow alongside Stachybotrys, fusarium, and chaetomium. Certain people may develop severe reactions that are comparable to hay fever when exposed to the mold. Detection and lab testing averages $500.

Serpula Lacrymans

Serpula lacrymans typically causes dry rot in wood. This very destructive mold can quickly degrade the cellulose. Sadly, it is hard to control and leads to widespread damage. Unlike most mold varieties, Serpula lacrymans transports its water from other locations, which is why it survives on dry wood. This mold variety even grows through dry mortar, plaster, and masonry. The health risks of mold exposure to this variety remain unknown. The cost of mold detection and laboratory testing averages $500.

Fusarium Mold

Fusarium mold is extremely dangerous to even healthy individuals. It can cause onychomycosis, a nail infection, and keratomycosis, an infection of the cornea. Left untreated, it can lead to scarring and blindness. Some individuals may develop a systemic infection when the spores enter the bloodstream. This form of mold usually occurs in areas around a water leak. Detection and lab testing costs around $700.

Stachybotrys Chartarum Mold

Stachybotrys chartarum mold is usually referred to as “black mold.” The mold spores of this variety grow best on gypsum board, paper, and fiberboard in areas with sustained water damage from flooding or water leaks. It also grows in areas with high condensation. It requires a constant supply of moisture to remain alive. This form of mold may lead to idiopathic pulmonary hemorrhage in infants. Detection and mold testing by a black mold specialist averages $700.

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Professional Mold Testing Cost by Type of Test

Typically, most homeowners opt to have a full house mold inspection. Following the inspection, the inspector performs more specialized testing. Several different types of mold testing are conducted. Sometimes, the expense of each must be factored into the average cost of mold testing. When considering professional mold testing costs, you should look at the various test options. Additional mold testing is usually performed post-remediation. It is useful in determining if the mold spore count has increased or decreased. Below is a table that outlines the different types of professional mold testing available.

Professional Mold Testing Cost by Type of Test

Type of TestingLaboratory (Fee and Lab Materials)
HVAC Mold Testing$50
Mold Cultures$50
Stain Testing$150

HVAC Mold Testing

HVAC mold testing is a specialized test done to look for mold in an HVAC system. Mold often occurs in the home’s ductwork and causes the inhabitants to develop allergy symptoms such as wheezing, itchy eyes, sore throat, headaches, runny nose, and sneezing. The mold inspector collects air samples. Additional samples are obtained using tape. The tape samples are taken from the home’s HVAC system filter and ductwork. The particles are then measured using a specialized laboratory test to determine if mold is present. The average cost of the test isc$50.

Mold Cultures

Mold samples are taken throughout the home during the mold inspection. At the lab, mold samples are grown in cultures to determine how rapidly the mold spores develop. Especially aggressive mold grows at a rapid rate and quickly forms a colony. If the mold does not grow in the culture, it means that the spores are dead. No active mold colony is present in the home. However, inhabitants can still suffer from health problems even from dead mold spore dust. The average cost of a mold culture is $50.

Stain Testing

Staining is a common mold test. The mold spores are trapped in the air and also taken from various surfaces throughout the home. The air samples are placed in plastic cassettes, and the mold spore samples from various surfaces are obtained using tape lifts and swabs. The laboratory uses staining to determine the type of mold, its spore counts, and growth patterns. Staining is a valuable mold test that determines what kind of mold is in the home. The test averages $150.

Mold Inspector Cost

Professionals should always carry out house mold inspections to ensure accuracy. With a basic inspection, a specialist reviews all potential spots of mold growth in the home. They also look for possible moisture control problems and suggest a remediation plan. A typical inspection takes approximately one hour to complete. Large home inspections can take up to two hours. The mold test samples obtained during the inspection are sent via overnight delivery to a laboratory for testing. Depending on the lab, the results take one to two days.

Two mold samples are usually included in the base charge for each mold inspection. However, each additional sample is subject to a fee between $60 and $80. Costs vary from state to state. But, since inspections are a standard service, rates are usually standard in most areas. Following the inspection, you receive a detailed report along with the lab results.

When finding a mold inspector, always look at the company’s qualifications and background. No official licencing body governs mold inspectors, but some home inspection organizations provide certificates that show the inspector meets certain industry standards.

The International Association of Certified Home Inspectors provides a comprehensive certification program for mold inspectors.

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Black Mold Inspection Cost

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 a 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 mold’s toxic nature, professionals may charge slightly more to inspect and test for these types of spores. Black mold testing and inspection cost the average homeowner $700.

Black mold on a wall behind an old wooden night stand

Mold Air Test Cost

Mold air testing involves sampling air particles to determine if mold spores are present, not visible to the naked eye. Inspectors use different 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 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 have an approximate testing and inspection cost of $700.

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 the attic are done to note any problematic areas. The inspector searches for visible mold spores and evaluates high humidity areas, 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 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 reports any construction problems found related to the mold. In some cases, the inspector may 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 sent to a laboratory to analyze both the type of mold and its potential for growth. The mold counts are calculated, which are very important in determining if spore levels are elevated inside the home when compared to outdoor levels.

Mold Location

Mold thrives in areas of the home that have been damaged by flooding or a chronic water leak. Depending on the mold variety, it can thrive due to high humidity within the home or condensation in places like a bathroom or basement. You can hire a mold inspector to perform a whole house mold inspection or only inspect a certain area of the home if you suspect it might be a problem area. The inspection price will be adjusted according to the rooms and the size of the home.

Some areas of the home are easier to inspect because they are more readily accessible. A basement and attic mold inspection involves looking closely at the walls, ceiling, and flooring. However, an inspection of a kitchen or bathroom is more detailed due to the plumbing throughout the rooms. The inspector must check under the sink and around the toilet, shower, or bath. They pay close attention to the walls, floors, and ceilings where an undetected leak can quickly lead to mold growth. Also, bathrooms are prone to condensation problems due to an improper exhaust system. The inspector must pay close attention to the room for hidden mold growth.

LocationSpotting Difficulty
Attic MoldEasy
Basement MoldEasy
Bathroom MoldDifficult
Kitchen MoldDifficult
Whole HouseDifficult

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Mold Inspection Cost Factors

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

The size of the house is the largest determinant in the cost of a mold inspection. A smaller home measuring less than 1,000 square feet will cost around $300. 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, the cost increases. The amount of drywall or construction materials that need to be removed determines the test’s final cost. 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 to $20 per square foot of drywall removal.

Mold Inspection and Testing Prep Work

Before an inspector arrives, you should take steps to improve accessibility. The inspector performs many of the steps needed to test mold samples. However, the service agency may ask you some initial questions before your appointment. You’ll want to make sure that the inspector has access to all rooms of the home, including the attic and basement.

Usually, an inspector inspects all rooms of your home and looks for signs of elevated moisture. However, some people might only have one or two rooms of the home inspected, such as a basement mold inspection or attic inspection. If furnishings are blocking the walls, you will want to move them towards the middle of the room so the inspector can see the walls of the room. Remove all soft furnishings and floor coverings, which could be hiding mold. If mold is suspected because of a flood, you will need to tear up all wet carpeting and remove it before the inspection.

Pull the appliances out so that the inspector can look behind the area to see possible mold growth. Also, 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 collected in areas where mold is suspected.

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. They are an important part of water damage restoration services. Although you should always have an inspection when you see visible mold, inspections are recommended in many other cases. The following are the most frequent reasons to arrange an inspection.

Newly constructed homes rarely have mold or excess moisture problems, but an older home occupied for a prolonged period requires a mold inspection. If you plan to sell an older home, you should book a home inspection with a mold check.

If you have experienced leaks, it’s important to arrange for a mold inspection in your home. Leaks could have occurred from the roof, pipes, or slab. Any type of wood structure with visible dry rot is prone to mold growth and should have an inspection even if you don’t see visible mold growth. The mold could be growing beneath flooring or behind drywall, wallpaper, or other hidden locations.

If you have recently suffered a flood, then there could be a mold problem in the home. Flood cleanup services should include both mold inspection and mold remediation before the building is once again occupied.

Any time you see mold growth 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. Remember, 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.

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Enhancement and Improvement Costs

Mold Damage Repair Cost

Mold damages wood flooring, drywall, paint, flooring, and other building materials in a structure. Once the cause of the mold is corrected, such as a water leak, and the mold is removed, it is time to repair the damage. The damaged building materials are completely removed and replaced. Drywall repair can cost around $180. Fixing a water main break averages $800. You’ll want to contact a local contractor to determine the repair cost.

Home Mold Removal Cost

The cost of home mold removal remediation averages $1,500 to $3,000. The process involves multiple steps, such as drying the affected area using fans and dehumidifiers. The area is sealed to prevent the mold spores from spreading. Air scrubbers clean the air along with the use of HEPA vacuums. Antifungal and antimicrobial cleaners are used to clean the hard surfaces. Any odor is removed using foggers. Much of the affected area will be torn out, such as drywall, wallpaper, or carpeting. New surfaces are then installed.

Dehumidifier Cost

A whole-house dehumidifier reduces the humidity in the air, which lessens mold growth. It pulls moisture from the air in the home. The air goes through a filtration and cooling process, which effectively converts the humidity into condensation. The condensation goes into a tank that is drained or piped out of the house via the waterline. A dehumidifier averages $900.

Flooring Replacement Cost

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

Cost to Reupholster Couch

If you have a beloved couch that becomes infested with mold, you need to remove the upholstery and stuffing. Take the couch down to the frame and add new stuffing and upholstery. The process is often far cheaper than purchasing a new couch. The cost of couch reupholstering work is a minimum of $950.

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 check all the required areas to confirm if mold is present 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 help control how dry your home remains. Remember to maintain the gutters and have them cleaned regularly. 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 are 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 occurred 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.
  • Review your detailed report to see the recommended remediation strategies. After removal, there is likely to be a recommendation for re-testing.
  • Seek out assistance from plumbers, repair service companies, or builders if leaks cause 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.
  • Certified mold remediation specialists do cleanup operations. 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.


  • How much does a mold inspection cost?

A mold inspection averages from $400 to $800.

  • Is mold inspection necessary?

A mold inspection is necessary if you suspect that your home has mold, if it has sustained water damage, or if you can visually see mold.

  • How much does it cost to get mold removed?

Mold removal averages $1,500 to $3,000.

  • How long does it take for mold to affect you?

Mold impacts your health within a day or two of exposure, according to studies published in the Environmental Health Perspectives.

  • Does bleach kill black mold?

Bleach kills black mold.

  • Can mold dry out and die?

Mold does not dry out and die but instead becomes inactive and can easily reactivate when exposed to moisture.

  • How can you tell the difference between mold and black mold?

It is hard to identify mold. You should have laboratory tests performed to determine the exact type of mold.

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