How Much Does Mold Devalue A Home?

Helen Skeates
Helen Skeates
20 min read

If you’re wondering “how much does mold devalue a home,” the answer is roughly 50%. The value of a home is reduced by half when it is infested with mold.

Even after treatment, the value of a mold-infested home drops by roughly 3%. This article discusses the relationship between mold and a home’s market value.

The Selling Value Of A House With Mold

Mold generally lowers a home’s resale value. Depending on the severity of the damage, a luxury home’s value can be reduced by more than half. Thousands of dollars could be lost as a result of a loss of this magnitude.

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Mold can have a negative impact on a property’s value. They may even be harmful to your health in some cases.

In either case, the results demonstrate the criticality of resolving mold issues as quickly as feasible. Basements and crawl spaces are particularly vulnerable to mold, so be sure to inspect them thoroughly.

Your home may still be marketable even if it’s been contaminated by mold. Below, we’ll explain how it might happen.

Can you sell a house with mold?

That is acceptable, so long as the information is made public. Mold-infested areas of your home should be made clear to potential buyers.

Also, let them know if you want to conduct a mold assessment and remediation. We’ll go over how to do that and how much it costs in the sections that follow.

Mold-infested properties can be more affordable for some buyers. While it goes without saying that the health risks of mold might put their lives in jeopardy. It is your obligation to inform children of the dangers of mold, but it is up to them to conduct their own research.

It’s important to remember that not all mold damage is irreparable. A ten-square-foot mold infestation is manageable even without the assistance of a professional.

However, this is only a general guideline. You may also have to take into account the type of mold you’re dealing with. If you’re having trouble identifying mold, this article on mold color identification may be of assistance.

Mold inspection costs

Mold contamination is frightening because of the associated costs. An average-sized home’s mold inspection may cost between $300 and $500.

Process and inclusions can vary. If mold remediation is included, the inspection may be free.

Sample testing and a thorough inquiry may be included in some cases. The typical cost of a mold examination for a large property is $700, not including mold remediation.

Mold growth’s exact location should be taken into account when calculating the cost of a mold examination. For a typical-sized house in a difficult-to-reach neighborhood, expect to pay up to $700.

Air conditioning and heating ducts, wall cavities, and crawl spaces are all examples of low-access and low-visibility places. The cost of a mold inspection may be greater in some places because of the presence of mold.

Two hours is all it takes to conduct a thorough assessment of highly accessible and conspicuous areas. Inaccessible places, on the other hand, may need six hours of travel time.

The air in your house will be tested for harmful spores if testing is included. The cost of this test is between $70 and $150. It is critical to do a mold air test since some mold spores might cause severe respiratory issues.

You may also want to hire a professional to check for mold in your home. Black mold testing, white mold mildew inspection, and pink mold examinations are all examples of mold testing. If you’re not familiar with pink mold, you may learn more about it by reading this article about “what is pink mold.”

Mold cleanup is the next step after a mold inspection. You can learn more about it by clicking here.

Mold remediation costs

About $15 to $30 per square foot of mold cleanup costs $2,325 on average. If your condition is severe, you may have to pay as much as $6,000.

You can remedy the problem yourself for just $50 if the mold-contaminated area is smaller than ten square feet. Mold remediation costs $75 to $108 per hour when broken down by the hour.

In mold removal, the most important things to examine are how quickly the mold was discovered and how it was dealt with. It is inevitable that more costs will be incurred if the problem is not addressed in a timely manner (e.g. drywall, subfloor).

If this is the case, additional charges could go as high as $5000. The degree of the mold contamination and the damage it has caused to the structure of your home are the two main factors to consider.

Experts in mold removal will work to keep the mold under control throughout mold abatement. Professionals are hired to remove the mold and thoroughly clean the affected area throughout this procedure. In addition, the containment materials are properly disposed of by them.

After the mold has been contained, the eradication procedure can be completed. Professionals disinfect the afflicted area after performing antimicrobial cleaning.

Abrading is the final step after antimicrobial cleaning. Finally, dry ice blasting and HEPA vacuuming are used to remove 99 percent of mold spores before the area is sealed up. Encapsulation is the final phase in mold abatement, in which professionals stop mold from growing.

Can You Sell a House With Mold Growth?

Putting a mold-infested home on the market is legal, but you may have difficulty finding a buyer. In fact, a study published in The Appraisal Journal found that up to 50% of bidders walk away from a property if they discover a mold infestation.

When it comes to mold, some states require you to disclose it, while others do not. As a result, your actions are entirely at your own discretion.

Issues That Mold Growth Creates for Homeowners

Truthfully, there are no positive aspects to a mold problem; nevertheless dealing with it doesn’t mean it’s doom and gloom. Prepare yourself ahead of time by being aware of what to expect.

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Decreased Home Resale Value

There’s no escaping the fact that mold has a negative effect on home value. According to the same study, the resale value of a home decreased by 20% to 37% on average for homes with minor and serious mold issues. The greater the problem, the greater the potential for a loss. In certain severe circumstances, a study published in The Appraisal Journal found that homeowners could only recoup half of what they spent for their properties when selling them.

Health Problems

Allergies, rashes on the skin, and asthma attacks can all be brought on by prolonged exposure to mold. Mycotoxins, for example, can be fatal.

Costly Mold Remediation

There is no guarantee that removing mold from your home will be completely successful. You may expect to pay an average of $2,200 for the services of a top-rated mold remediation professional in your area. However, if you can safely remove mold yourself, you may be able to save money on labor costs. Even if you use bleach to clean up a mold problem, it can be more difficult than you believe.

Know the Difference Between Toxic Mold and Mildew

It’s common to encounter benign mildew in bathrooms and moist basements that’s mistaken for mold. Aside from its unpleasant odor, mildew isn’t a big deal, but it should be treated with to prevent it from developing into a much more serious problem.

Because dangerous mold is black and dark in comparison to mildew, you’ll virtually always be able to tell the two apart based on their color. Organic debris commonly referred to as “black mold” can contain everything from relatively benign penicillin to the lung illness-causing Stachybotrys. It can also contain mold spores.

Find Out If You Have a Mold Infestation

While it may appear that discovering poisonous mold is a simple matter, the distinction between toxic mold and its harmless equivalent is not always clear. If you notice any of these symptoms, you may be dealing with a mold infestation.

  • If you check at the walls or furnishings, you’ll see discoloration or black areas and cottony, speckled growth.
  • It will have a musty or earthy odor, and at times it will smell like rotting produce.
  • Coughing, sneezing, congestion, irritation of the nose or throat, and skin rashes could be signs that you have a mold problem in your home if anyone in your family feels them.

When Can Mold Become a Problem in the Home?

Mold growth in a house is quite normal and poses no health risk. Visible signs, foul odors, and negative health effects are all indications that mold is growing in your home. The less impact a significant mold problem has on your home’s resale value and how comfortable you are in it, the faster it may be remedied.

Make sure to use dehumidifiers, plug any leaks, and clean up any visible mold if you live in an area prone to high humidity or have rooms that are particularly susceptible to it. When in doubt, try to keep humidity levels between 30% and 50% to minimize the growth of hazardous mold.

How to Remove Mold to Help the Resale Value

Water damage is the most common source of mold infections, as the fungus needs moisture to flourish. Mold spores are more likely to form if any of these conditions exist.

Roof or Plumbing Leaks

Repair any leaks or cracks in the sensitive areas before time runs out, because mold begins to grow 24 to 48 hours after water exposure. Until you can engage a top-rated local plumber or take the time to fix it yourself, a temporary fix like patching up a ceiling break or minimizing water use in particular places can suffice to keep mold from forming. When you’re done, be sure to dry everything thoroughly.


To prevent the spread of mold, water damage caused by flooding must be dealt with quickly and thoroughly. It may not be able to stop the spread of the disease completely, depending on the extent of the affected area. However, if you act quickly and contact a local emergency cleaning agency, you can save excessive losses.

Excess Humidity

More humidity is more harmful than helpful, even if it’s just a little bit. Mold may be kept to a minimum in your house by using dehumidifiers and exhaust fans to reduce humidity. To eliminate mold from bathroom ceilings, learn about mold remediation.

Poor Ventilation and Insulation

Moisture can get into your air conditioner’s condenser if your windows and doors don’t close tightly enough or if the air in your home isn’t circulated well enough. A moldy house is the last thing you need when you’re trying to keep the temperature exactly right.

If this is an issue for you, you can handle it yourself and save money by removing the mold from your air conditioner.


How much does mold affect home value?

Schioppa thinks that mold-infested homes lose roughly 3% of their value if they have been properly and documented treated. Despite the team’s best efforts, the house the team treated still lost half its value.

Does mold affect home appraisal?

Depending on the circumstances, the effect on market value could be substantial. I’ve appraised houses where the mold damage was so bad that the remediation costs were greater than the home’s market worth. In most situations, the house is demolished.

Do most homes have mold?

“Mold spores are present in every home and environment.” When the amount of mold spores in a house exceeds the amount found outdoors, it becomes a problem. Mold thrives in homes where the temperature is just right for it to grow. As dust or dirt is impossible to completely remove from a home, mold thrives on it.

When can I walk away from mold in my house?

Mold, termites, and a damaged foundation are to blame for the home’s failing inspection. Don’t bother trying to remedy these kinds of problems if you’re not familiar with them or don’t have the money to do so. Termites and foundation issues can be expensive to repair, whereas mold can be treated.

What happens if mold is found during home inspection?

If an issue with the house is discovered during the inspection (such as an electrical problem or mold growth), the seller will normally take care of the situation. If this is the case, the seller may grant the buyer a seller credit to cover the cost of cleanup. Selling a house means disclosing everything about it, including any mold issues.

How are home appraisals determined?

After performing a visual inspection, an appraiser uses comparable sales, current market trends, and the property’s features (such as features, layout, and square footage) to generate a report on the property’s appraised value.

How do I check my house for mold?

Mold is usually easy to spot, although minor or mostly undetectable growths might just make a surface appear unclean. The quickest way to check for mold is by dipping a swab in diluted bleach (1 part bleach, 16 parts water) and swiping it on the surface of the wall. Assume it’s mold if the spot gets lighter quickly (or if it continues coming back despite washing it).

Do FHA appraisers look for mold?

No, I don’t think so. It’s safe to anticipate that if the FHA appraiser finds mold, he or she will make recommendations for fixes to address the condition. That being said, FHA appraisers do not have to be mold experts.

Does a house have to be empty to be appraised?

Real estate appraisers are taught to ignore the clutter and the furniture in a property and to imagine the area as if it were completely void. Even though your home’s value isn’t determined by how well you keep it clean or how organized you are, it’s a good idea to tidy up before an evaluation so the appraiser can get a good look.

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How much is a bathroom worth on an appraisal?

A bathroom’s value is determined by how much it costs to renovate it. The value of a bathroom expansion might range from 10% to 20% of the home’s overall value.

Should you not buy a house with mold?

Buying a home with mold may or may not be a good idea. Your major guiding principles should be your financial situation, your physical fitness, and the timeline for your move. As an example, it’s not sensible to buy a home with mold and allergies if you need to move in right away.

Does an appraiser look at mold?

During a home inspection, a professional checks your property to ensure it is safe to live in. Among the many things a professional house inspector will check for are mold, foundation flaws, termite infestation, unstable roofs, and more. Your home’s value is evaluated by the appraiser throughout the appraisal process.

Is it safe to live in a house after mold remediation?

Possibility of Remaining in Your Home During Mold Removal If you can’t leave the premises while the work is being done, you should do so. Leaving the home is often recommended by mold removal and remediation businesses, especially if numerous rooms and hallways have been impacted.

What to do if you bought a house with mold?

Following these five steps will help you get your house back in order if you discover mold after purchasing it. Make sure you know what kind of mold it is. Find Out Who is Responsible. Get Legal Advice. Contact the Seller. Repairs, Removal, and Remediation should be taken care of.

Do appraisers look under sinks?

Look under the sink if you’re an appraiser to see what’s there. The appraiser may ask for repairs if he or she sees something like this in the property. Even if you don’t disguise the fact that you have a mold problem, fixing it before the appraiser arrives can be worth it.

Does black mold affect appraisal?

What Effect Does Mold Have on a House’s Value? A home’s value might be affected by mold. This is excellent news for some buyers because it lowers the price of a house. Don’t buy a property with mold until you’ve had an independent appraisal done, especially if you’re planning to move into an excellently maintained home..

Can I live in a house with mold?

If you have mold in your house, you may experience respiratory tract symptoms such as coughing, wheezing, and throat swelling, according to the Centers for Disease Control and Prevention. Asthmatics and allergy sufferers are particularly vulnerable.

Is it hard to sell a house with mold?

Selling a Mold-Infested Home Is selling a home with mold legal? You may be surprised to learn the answer is yes. There are no legal barriers to this. The process of selling a home with mold issues can be a little tricky, but it isn’t unheard of. Houses are bought and sold as-is by cash purchasers.


Whether in the home or on one’s health, mold may do a lot of damage. Mold-free homes are more valuable since you know how much mold devalues them.

Helen Skeates

Helen Skeates

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