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Dec 4, 2022

10 minutes

How To Get Rid Of Mice In The Crawl Space – 5 Easy Steps

Having mice in your home’s crawl space can be difficult and uncomfortable. Not only can they cause significant damage if left unchecked, but they are also known to spread diseases that could put your health at risk. Also, mice in the crawl space can make your home smell bad and lead to expensive repairs. Fortunately, there are various strategies you can use to get rid of mice in the crawl space, including trapping, baiting, exclusion, and more.

This guide will walk through different methods to get rid of mice in the crawl space and give tips for preventing them from returning. Let’s get started.

What Are The Signs Of Mouse Infestation?

Crawl spaces provide the perfect environment for mice since they are dark and have plenty of hiding spots. It’s important to identify any signs of a mouse infestation as early as possible to get rid of them before they cause more serious damage. Common signs that you may have a mouse infestation include:

  • Droppings: You may find mouse droppings in the corners of the crawl space or on items the mice have been eating. Mouse droppings are usually dark and tapered, about 1/4 to 1/2 an inch long.
  • Chewed Food Packages: Mice often get into food packages and chew through them for a snack. You may find empty packages chewed through, or food crumbs left behind. Food will also attract mice.
  • Scratching Noises: Mice are nocturnal and most active at night, so you may hear scratching noises in the crawl space as they move around.
  • Gnaw Marks: Mice have sharp teeth and will chew on wood, plastic, and other materials. You may find gnaw marks on items in the crawl space or along walls and baseboards.
  • Urine Smell: As mice move around, they leave urine behind, creating an unpleasant odor in the crawl space.
  • Yellow Stains: Wild mice often leave yellow or brown stains along walls and corners where they urinate. There may be a smell of a dead mouse.

If you notice any of these signs in your crawl space, it’s time to take action and eliminate the mice. Don’t wait too long, as a mouse infestation can quickly worsen if left unchecked.

Mouse trap with a piece of cheese in front of hole. 3D illustration.

Steps To Get Rid Of Mice In Crawl Space

After identifying the signs of a mouse infestation in the crawl space, it is time to take action to eliminate them. Here are some key steps to do this:

1. Start With The Exclusion

Exclusion is the process by which you reduce or eliminate potential entry points for rodents into your home. This includes sealing up any cracks or crevices around the exterior of your home, such as those found around doors and windows. Additionally, installing a weather strip or door sweep on the bottom of any exterior doors can help block rodents from entering.

You can also inspect the crawl space for open areas or holes where mice can slip through. If you find any, use metal mesh or other material to plug them up and prevent access. Don’t forget to inspect the attic as well since mice can travel back and forth between the two spaces.

2. Don’t Attract Mice To The Home

Next, ensure you don’t attract mice to your home in the first place. It’s important to keep your crawl space free from debris and food sources that might lure rodents. Make sure all food products are stored in containers with tight-fitting lids, and dispose of any waste promptly.

Also, reduce moisture and dampness in the area by fixing any water leaks, using a dehumidifier, and making sure crawl space vents are open to increasing airflow. You should also check for any holes or openings leading outside and patch them up if you find any.

3. Reduce Yard Debris And Surrounding Vegetation

Ensure that the area around your home is kept clean and clutter-free. This means removing yard debris, such as leaves and sticks, trimming back vegetation, such as grass or shrubs, and disposing of compost away from your foundation walls.

Doing so will help reduce the number of hiding spots for mice and rodents, making it less likely that they’ll take up residence in your crawl space.

4. Place Traps

The next step you need to take is to place traps around the crawl space. Several types of traps are available, including:

  • Glue traps are placed along the walls and can be purchased in local hardware stores or online. They work by trapping mice that come into contact with them, so make sure to place them where you think the rodents could gain access to kill mice.
  • Snap traps should be baited with peanut butter, chocolate, or other food that mice love. Place these mouse traps along the walls or in areas where you think the mice would be likely to travel, and make sure they are baited properly before setting them.
  • Live traps are humane traps that capture the mouse without killing it. Place these glass or metal containers close to where the mice have been seen, and check them regularly to see if they have been caught.

While these traps effectively control the rodent population, it is important to remember that they require regular maintenance and monitoring. Additionally, if a mouse has been trapped in one of these devices, you must dispose of it properly to prevent re-infestation. Follow the instructions on the trap packaging to ensure proper use and disposal of dead mice.

5. Call The Pros

If you cannot get rid of the mice in your crawl space, don’t hesitate to call the professionals. Pest control companies can provide effective and safe solutions that may not be available to you as a homeowner. They will also have access to more powerful traps and bait that can help eliminate even large colonies of mice. Additionally, they can provide advice on how to prevent future infestations.

However, if you choose to call in the experts, ensure they are licensed and insured, as this will protect you should anything go wrong. Also, look into their experience in dealing with mice or other rodents so that you know they can deliver results.

Cute mouse caught in a live trap holding a piece of bread before being released in nature; Shallow depth of field

How To Prevent Mice Infestation In The Future

Once you’ve gotten rid of the mice in your crawl space, preventing future infestations is important. Here are some prevention tips:

1. Regular Inspections

Regularly inspect the exterior of your home for signs of entry points. Mice can fit through small openings and crevices, so check around windows, doors, vents, pipes, and other points of entry for damage. If you find any openings, use caulk or steel wool to seal them securely. Also, inspect for any food sources that may be attracting the mice.

2. Remove Food Sources

Mice will eat almost anything, so it’s important to immediately store all food products in sealed containers and clean up any crumbs or spills. Keep garbage cans covered and regularly clean them out with bleach and water. Also, ensure birdseed, pet food, and other foods are sealed in containers and not accessible to mice.

3. Remove Clutter

Mice love clutter since it gives them plenty of places to hide. Clean your crawl space regularly by removing accumulated debris or junk over time. You can also use a broom and dustpan to sweep out any cobwebs or other materials that could provide a home for the mice.

4. Use Repellents

You can use several repellants to help keep mice away from your crawl space, such as natural oils, traps, and ultrasonic devices. Research each option carefully before deciding which is right for your situation.


1. What Causes Mice In Walls?

Mice generally enter the walls of your home or crawl space through small cracks and crevices. These tiny holes may seem insignificant but are large enough for mice to get through. Other potential entry points might include open windows, gaps in door frames, vents with missing screens, or unsealed openings where pipes and wires enter a structure. Also, mice can be attracted to homes or crawl spaces with easy access to food, water, and shelter.

2. How Long Does It Take To Get Rid Of Mice?

The time it takes to get rid of mice depends on the extent of the infestation and the strategies you use. Generally speaking, it can take several days to weeks to completely eradicate the mice problem. Some factors influencing this rodent control timeframe include the infestation size, the number of entry points and exit routes, and whether or not you are using professional pest control company assistance.

3. Which Essential Oils Are The Most Effective Against Mice?

Essential oils can be a great natural way to repel mice from your crawl space. Peppermint, lavender, and lemon are some of the most commonly used essential oils. All three have properties that make them unpleasant for mice to smell, so they often prefer to stay away from areas where these oils are present. Additionally, you may also consider using cedarwood oil or eucalyptus oil to help repel mice as well.

4. Are Cats Or Dogs Effective At Getting Rid Of Mice?

Cats and dogs can prevent mice from entering or living in your crawl space. A pet alone is often enough to keep mice away, as they are aware of the natural predators in their environment. However, if you use a cat or dog to help with your mouse problem, it is important to ensure that the animal has been trained to identify and capture rodents properly.

5. How Sound Deterrents Can Help Get Rid Of Mice?

Sound deterrents are another effective way to eliminate mice from your crawl space. These devices emit a loud, ultrasonic sound that irritates and disrupt the rodents’ hearing. This sound can be so irritating that mice will leave an area rather than stay in it for an extended period. Additionally, sound deterrents can be combined with other prevention strategies to create a comprehensive plan for mouse control.

6. What Is The Best Way To Seal Up Cracks And Gaps In Walls?

The best way to seal up cracks and gaps in walls is by using caulk or expanding foam. These materials are designed to fill in and seal small openings, preventing rodents from entering. Also, you can use steel wool around potential entry points to prevent mice from chewing through them.


Following the steps outlined in this guide should have you well on your way to getting rid of that pesky mouse problem in your crawl space. It’s important to remember that prevention is the best way to handle a mouse invasion, so seal up any entryways and clean up after meals. From setting up humane traps to using essential oils, there are several effective methods for getting rid of mice. No matter what method you choose, stay diligent and consistent in your efforts, as that’s the best way to ensure your success.

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