< Go Back to the iBuyer Blog

Crawl Space Issues – How They Affect Home Value

Posted on Share:

mold in crawl space beneath single family home

Get Multiple Cash Offers in Minutes with an iBuyer.com Certified Specialist.


Moisture buildup, mold growth, and structural damage are results of crawl space issues. While these problems often go unnoticed, they can have severe impact on your property’s value and deter potential buyers. 

This article will delve into the main issues associated with crawl spaces, their effect on home value, and practical solutions to mitigating these problems.

Whether you’re dealing with sagging floors or pest infestations, iBuyer.com can connect you with cash-buyers interested in purchasing your home as-is. Enter your home address to get started and see how much your home is worth today.

Compare Cash Offers from Top Home Buyers. Delivered by Your Local iBuyer Certified Specialist.

One Expert, Multiple Offers, No Obligation.

What is a crawl space?

A crawl space is a narrow area beneath the main floor of a house, typically less than 5 feet tall, that provides access to plumbing, electrical wiring, and HVAC systems. It usually has solid walls and offers little standing room. Crawl spaces are not full basements and are often used to promote air circulation through the home and to provide easy access for maintenance and repairs. They can also help to prevent moisture and pests from entering the living areas of the home.

Do all houses have crawl spaces?

Not all homes have crawl spaces. Some have basements. And others are built on top of a concrete slab.

But if you do have a crawl space, you need to take measures to maintain it. If you don’t, a number of problems can crop up. We’ll get into these problems in more detail below.

How crawl space issues affect your home value

Crawl space issues run the gamut from mold growth to pest infestations to uneven floors and more. As you might expect, all of these problems have the potential to affect a home’s value negatively.

What would you do if your prospective home had a pest infestation in its crawl space? In all likelihood, you would be looking for a price reduction.

If the floors were uneven, you would expect an even bigger reduction. That’s not a cheap problem to fix, after all.

The fact of the matter is that a damaged crawl space is a liability. No one is going to pay the optimal price for a liability. In other words, as the seller of your home, if you have a damaged crawl space, you will miss out on money.

This is why, prior to putting your home on the market, you need to strongly consider repairing the problems in your crawl space. Depending on what those problems are, you could be saving thousands and maybe even tens of thousands of dollars.

How to fix crawl space issues

Now, you’re probably wondering how to fix crawl space foundation issues. Of course, this depends on the specifics of the problem. So, to get you started, let’s review several common problems below.

1. Uneven floors

One of the most troubling crawl space issues you can come across is the issue of uneven floors. This generally presents itself as a floor that dips and sags.

What causes it? Deteriorated floor joints and columns, not to mention standard crawl space settling. What causes this? Moisture!

So, if you want to prevent this problem from happening, you have to get rid of the moisture that makes its way into your crawl space. This can be done through crawl space encapsulation.

Crawl space encapsulation entails placing a waterproof barrier around the edges of the crawl space. It also includes sealing vents and insulating the walls of the crawl space.

Of course, you’ll also need to repair the deteriorated columns and floor joints. Until these are repaired or replaced, your floors will continue to sag, and likely worsen over time.

2. Water in the crawl space

Crawl space moisture issues are extremely common. After all, the crawl space is right next to the soil, which holds tremendous amounts of groundwater. Crawl space water issues are almost an inevitability.

The issue is that water can wreak absolute havoc on a crawl space and the house that surrounds it. Not only can it result in mold growth and musty smells but structural damage as well.

Therefore, you must do everything you can to keep your crawl space moisture-free. This starts with the encapsulation of your crawl space. It’s then supplemented with things like dehumidifier installation and sump pump installation.

3. Mold issues

Simply put, crawl spaces are hotbeds for mold. Because they take on water on a regular basis, and because they’re dark, they’re practically the perfect place for mold to thrive. Therefore, it’s almost certain that, at some point, you’re going to have mold growth in your crawl space.

Now, you might be thinking: so what? You can’t see it, so what difference does it make? But mold can have a number of negative effects outside of an unpleasant aesthetic.

For one, mold smells bad. Rest assured, that smell will make its way into your home.

For two, mold can cause crawl space health issues. Therefore, if it’s present in your crawl space, you could find yourself prone to fits of sneezing, coughing, sore throat, and more.

This is why we strongly advise removing mold from your crawl space. Even more, we recommend encapsulating your crawl space to prevent further mold growth in the future.

4. Rotten smell

Does your home carry a rotten and musty odor? This is often referred to as the “old house smell”. Where does it come from? In most cases, the crawl space.

As was noted above, as a crawl space is exposed to more and more moisture, it attracts mold. The more this mold accumulates, the stronger and smellier the odor it releases.

As you might expect, the smell produced in the crawl space tends to waft up into the home’s first floor. So, if there’s mold in the crawl space, the home itself is going to smell old and musty.

The fix? First of all, you need to get rid of the mold. Then, you need to take measures to waterproof your crawlspace. This includes sealing vents, applying a vapor barrier, adding a sump pump, installing a dehumidifier, and more.

5. Pest infestation

Crawl spaces are particularly prone to pest infestations. This stands to reason, as they’re cold, wet, and uninhabited places where insects can find refuge and feel comfortable.

But insects, unfortunately, can cause several problems after they’ve worked their way into a crawl space. Some of these insects will gnaw at the wooden support beams within your crawl space, causing structural damage and resulting in sagging floors. Other insects will spread disease, making your home a potentially dangerous place.

Therefore, they need to be done away with. First, call up a pest control company. Once they’ve eradicated the insects in your crawl space, consider encapsulating your crawl space.

Encapsulating your crawl space will make it much more difficult for insects to work their way into it. Plus, it will be less attractive to insects, so they’ll be less likely to go there anyway.

6. Cold Floors

Another problem that a crawl space can cause is the problem of cold floors. When a crawl space isn’t properly insulated, the air within it can travel upward. During the cold months of the year, this, of course, makes the floor cold.

The solution? Insulation! Make sure that your crawl space is adequately insulated and you’ll never have to worry about this problem ever again.

7. High energy bills

The last problem we’re going to discuss is the problem of high energy bills. Why might a crawl space cause energy bills to skyrocket? It all comes down to a lack of insulation.

As noted, the air in the crawl space will rise into the home above. Therefore, if you’re trying to, for example, heat your home to counteract cold outside, a non-insulated crawl space will negate some of your efforts.

To make up for this, your heating system will work even harder. This, of course, will result in greater energy usage and, therefore, higher energy bills.

The remedy is simple: insulate your crawl space.

Sell your home today

As you can see, crawl space issues can have quite a negative effect on a home’s overall value. Therefore, before you put your house up for sale, you’re strongly advised to repair your crawl space.

Looking to sell your home today? iBuyer.com has you covered. Get started by requesting a home valuation!

Instant Valuation, Confidential Deals with a Certified iBuyer.com Specialist.

Sell Smart, Sell Fast, Get Sold. No Obligations.

Sell Smart, Sell Fast with iBuyer.com
Discover Your Home’s Value in Minutes.