How Much Does Crawl Space Repair Cost in 2025?

This article was created using automation technology and thoroughly fact-checked and edited by HomeAdvisor Editor Ryan Noonan.

Most homeowners spend an average of $6,000, or between $4,500 and $8,000, for crawl space repairs. This works out to an average of $3 to $5.50 per square foot. Minor fixes like vent repairs sit at the low end, while structural work pushes costs higher.

Crawl space repair is a worthwhile investment that protects your foundation and keeps your home structurally sound. It's also important to keep your crawl space clean and dry for your and your family's health. Dirt, mold, and pest droppings might affect your home's air, especially if you have ductwork running beneath it.

Crawl Space Repair Cost Factors

Crawl space repairs average $6,000 when encapsulation and structural upgrades, such as beam or joist work, are included. You may also pay extra for smaller tasks like vent fixes. Common add‑ons include:

• Water damage

• Insect damage

• Rotting structural elements

• Foundation issues

• Insulation replacement

Some crawl space repair cost factors to consider include the following.

Size of the Space

Larger crawl spaces take more time to clean and repair, so expect to pay more overall. Crawl space repair costs between $3 and $5.50 per square foot. Add repair or restoration work, and the price per square foot increases accordingly.

Problem Type

Your final cost depends on the specific issues in the space. Major problems—such as structural cracks, mold, failed sealing, or an outdated drainage system—can push the total toward $15,000.

Accessibility

Crawl spaces under three feet high are harder to access, so contractors charge an additional fee.

Crawl Space Cost by Repair Type

In many cases, a successful fix combines repairs, cleaning, and preventive measures. For example, suppose you have moldy, rotted beams. In that case, you'll probably want to clean them or get mold remediation, replace any damaged beams, and install an encapsulation system to lower humidity levels and avoid future mold issues.

Foundation Settling 

Foundation repairs cost $3,000 to $15,000 or more, depending on the extent of the damage. However, if you only need minor crack repair, it may cost between $250 and $1,000, and mudjacking for foundation leveling often runs $500 to $2,000. You might need to replace or shore up supports, fix cracks, and relevel the house. A local foundation repair pro secures it with piers, piles, or mudjacking.

You’ll also want to ask your foundation repair pro about issues with your soil. Sometimes, soil can make the foundation settle further or cause other problems.

Water Damage

Water damage restoration costs between $2,000 and $10,000. You can prevent future water damage through encapsulation and waterproofing, but that adds more costs—anywhere between $1,500 and $15,000, depending on the size of the crawl space. With flood damage, you'll want to consider hiring a local water restoration company, while a crawl space cleaner can handle other types of damage.

Insulation Replacement

Crawl space insulation removal and replacement costs between $500 and $4,000. Damaged or inadequate insulation affects the comfort of your home and raises heating and cooling fees. Prices depend on the type of insulation used, as well as whether you’re insulating walls, the subfloor, or both.

Pest Removal

Warm, wet areas attract insects and rodents. Removing rodents costs between $180 and $610 in most minor infestations. Contact a pest control service near you to remove unwanted guests and treat the crawl space to prevent their return.

Mold Remediation

It’s vital to keep your air as free as possible of mold, mildew, and bacteria to help with issues like asthma and allergies. Mold removal costs anywhere from $1,000 to $6,000, depending on the severity. If you have mold, you probably have moisture or water issues too. Dealing with moisture in your crawl space with encapsulation, vapor barriers, sealing, and dehumidifiers can keep this problem from repeating.

Full Encapsulation

Installing a full crawl space encapsulation system can cost between $1,500 and $15,000. This involves sealing the space to prevent moisture, installation of a vapor barrier, and sometimes adding a dehumidifier to control humidity levels.

Vapor Barrier Replacement

Vapor barrier replacement typically costs $1,000 to $3,000. It’s an effective way to control humidity in your crawl space and prevent mold, rot, and pest infestations, although underlying issues still need addressing first.

Waterproofing

Waterproofing a crawl space can range from $1,500 to $15,000, depending on the extent of the work. This may include installing interior or exterior drainage systems, sump pumps, French drains, and sealants to keep water out.

Support Beam Replacement

Replacing a support beam costs between $1,500 and $5,000 per beam. Prices for beam replacement depend on the difficulty of access, the material used (wood or steel), and any other structural damage present. You’ll also need to fix the root cause of the problem, often a settling foundation or water damage.

Crawl Space Maintenance Costs

Preventive upgrades may cost a few thousand dollars, but they often save at least that much by avoiding future repairs.

Preventive Crawl Space Fixes

Consider these preventive measures to avoid future crawl space issues:

• Sump pump installation costs range from $640 to $2,100. You’ll usually want this included with a tile drainage system under the slab.

• A drainage system costs between $1,500 and $15,000.

• Plumbers charge $45 to $200 per hour and can address leaky pipes to avoid recurrences.

• Crawl space encapsulation costs $1,500 to $15,000 and helps avoid humid environments.

• Landscape grading costs $1,000 to $3,300 and helps drain water away from your crawl space.

Budgeting for Crawl Space Repair

A strong foundation and a clean, hazard‑free crawl space are critical, so hire a local pro for repairs.

• Inspect your crawl space twice a year for moisture, pooling water, signs of mold or fungus, insects, rodent droppings, rotting wood, and cracked concrete—the sooner you address these issues, the less they’re likely to cost you to repair.

• When you notice a potential issue, call a crawl space inspector right away to diagnose the problem and get recommendations for repair before the issue becomes more severe.

• If your crawl space is prone to getting damp in periods of heavy rainfall, regularly run a dehumidifier to reduce moisture and prevent cracks in the foundation, mold growth, or rotting beams.

• Try to keep the crawl space as clear as possible to allow for more airflow and to avoid creating hiding places for mold and pests.

DIY vs. Hiring a Pro

Hiring a professional for crawl space repair is crucial because expert assessments ensure both surface issues and deeper structural problems are addressed. Licensed contractors utilize specialized tools and proven techniques to secure your foundation and implement lasting repairs. Their industry expertise guarantees comprehensive repair and long-term performance, undoubtedly safeguarding your home’s integrity.

How HomeAdvisor Gets Its Cost Data

No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. After a project is complete, we survey real customers about the costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.