If you’ve spotted small holes appearing in your yard, garden, or around your property, rats might be the culprits. These holes can show up seemingly overnight, and they often appear near foundations, under sheds, or along fence lines. But why do rats dig holes in the ground?
Rats dig holes in the ground to create burrows where they live, raise babies, and store food. These underground tunnels provide shelter from predators and weather, plus a safe place to sleep during the day. A single burrow system can have multiple entrance holes and can house an entire rat family.
The holes you see are actually entrances to a complex underground tunnel system. Rats are natural diggers with strong front claws designed for moving soil, and they’ll create elaborate burrow networks when they find a good spot to settle.
What Rat Burrows Look Like
A typical rat burrow entrance is about 2 to 4 inches across, which is just big enough for an adult rat to squeeze through. The hole usually has a smooth, worn appearance around the edges because rats use it repeatedly.
You’ll often find loose dirt piled near the entrance, especially when the burrow is new and the rats are still excavating. Fresh digging shows up as lighter-colored soil that hasn’t been exposed to air and weather yet.
Rat burrows usually have at least two entrances (and often more). This gives the rats escape routes if a predator comes in through one hole. The secondary entrances are sometimes harder to spot because they might be hidden under vegetation or debris.
The actual tunnel can extend 2 to 4 feet underground and spread out horizontally for 6 feet or more. Inside the burrow system, rats create chambers for different purposes: a main nesting chamber, storage areas for food, and bathroom areas.
Why Rats Prefer Underground Living
Living underground gives rats protection from the weather. The ground temperature stays much more stable than the air temperature above. In summer, burrows stay cool. In winter, they stay warmer than the surface.
This temperature control is really important for rats because (as mentioned earlier) they don’t handle extreme temperatures well. A burrow maintains a comfortable range that keeps rats from overheating or getting too cold.
Burrows also protect rats from predators. When a rat is underground, they’re safe from hawks, owls, cats, dogs, and other animals that would happily eat them. The narrow tunnels mean that even if a predator finds the entrance, most can’t fit inside to chase the rat.
The darkness of burrows suits rats perfectly too. Their eyesight isn’t great, but they have excellent senses of smell and touch. They navigate their burrows using their whiskers and sense of smell, so darkness doesn’t bother them at all.
When Rats Dig New Burrows
Rats dig new burrows when they’re establishing territory in a new area. A pregnant female will often dig a burrow (or take over an abandoned one and expand it) before giving birth. She wants a safe, secure spot to raise her babies.
Young rats that leave their birth colony will dig their own burrows when they find a good spot to settle. Male rats sometimes dig burrows to attract mates, showing females that they’ve established a good territory.
Rats also dig new escape holes from existing burrows. If they feel threatened or if the burrow is getting crowded, they’ll create additional exits. This is why you might see more holes appearing over time even though you thought you’d found all the entrances.
Seasonal changes can trigger digging too. In fall, rats might dig deeper or create more storage chambers to prepare for winter. In spring, they might expand the burrow system to accommodate new babies.
The Best Spots for Rat Burrows
Rats look for specific conditions when choosing where to dig. They want soft soil that’s easy to work with. Hard, rocky, or very clay-heavy soil is difficult to dig, so rats avoid these areas if they have options.
They also need the burrow to be near food sources. Rats don’t want to travel far from their burrow to find food because that exposes them to danger. If they can dig a burrow close to a consistent food source (like a garden, compost bin, or garbage area), that’s ideal.
Areas near buildings are especially attractive. The foundation of a house, shed, or garage provides a solid “roof” for part of the burrow. Rats will dig along foundations and even under them, using the building’s structure as part of their burrow system.
Spots with cover are also preferred. Rats like to dig under bushes, woodpiles, thick vegetation, or other objects that hide the entrance. This makes it harder for predators to spot the hole and helps the rats feel safer coming and going.
How to Identify Rat Holes vs Other Animal Holes
Not every hole in your yard is from rats. Other animals dig too, and it’s important to know the difference. Rat holes are usually 2 to 4 inches in diameter and have a very smooth, oval or round opening.
Mole holes are different. Molehills are volcano-shaped mounds of dirt with the hole in the center or to the side. Mole holes are also smaller, usually 1 to 2 inches across. Moles create raised tunnels just under the surface too, which rats don’t do.
Chipmunk holes are similar in size to rat holes, but they’re usually very clean with no dirt piled around them. Chipmunks carry the excavated dirt away in their cheek pouches and scatter it somewhere else, while rats push dirt out and leave it piled near the entrance.
Rabbit holes are bigger, usually 4 to 6 inches or more across. Rabbits also create more obvious trails leading to and from their burrows, while rat paths are often harder to spot.
Signs of Active Rat Burrows
Just finding a hole doesn’t mean rats are currently using it. Some holes might be old and abandoned. To tell if a burrow is active, look for fresh digging and loose dirt that’s different in color from the surrounding soil.
Active burrows show signs of traffic. The entrance might be worn smooth and packed down from rats constantly going in and out. You might see small paths or runways leading to the hole, where rats have worn down the vegetation from repeated use.
Fresh rat droppings near the entrance are another clear sign. Rat droppings are dark brown or black, about half an inch long, and shaped like rice grains. Fresh droppings are soft and shiny, while old ones are hard and gray.
You can do a simple test by loosely filling the hole with crumpled newspaper, leaves, or dirt. Check it the next day. If the material has been pushed out or moved, rats are actively using that entrance.
The Damage Rat Burrows Can Cause
Rat burrows aren’t just ugly holes in your yard. They can actually cause structural damage depending on where they’re located. Burrows dug under foundations can undermine the soil support, potentially causing settling or cracks in the foundation.
Burrows under driveways, patios, or walkways can create voids that eventually cause the surface to sink or crack. When you drive or walk over these areas, the ground might feel soft or unstable.
In gardens, rat tunneling can damage plant roots. The rats might not be eating the roots, but their tunnels disturb the soil and can expose roots to air or disconnect them from the water supply.
Burrows near water lines, sewer pipes, or electrical cables are especially concerning. Rats might chew through these utilities while digging, or the tunnels themselves might cause pipes to shift or break.
How Many Rats Live in a Burrow
A single burrow system can house anywhere from 2 to 15 rats, depending on its size and complexity. A typical colony might include an adult breeding pair and their offspring from several litters at different ages.
Larger, more established burrow systems can support even more rats. In urban areas with lots of food available, you might find 20 or more rats using a connected burrow network.
Not all the rats are inside the burrow at the same time though. Since rats are mostly nocturnal, during the day the burrow is full because everyone’s sleeping. At night, many of the rats are out looking for food.
Burrows get crowded, which is partly why rats keep expanding them and why young adult rats eventually leave to dig their own burrows elsewhere.
Seasonal Changes in Burrowing Behavior
Rats dig more actively at certain times of year. Spring is a big digging season because rats are breeding and need to prepare nursery chambers for babies. You’ll often see new holes and fresh dirt appearing in March through May.
Fall is another active digging time. Rats are preparing for winter by creating deeper chambers and storage areas for food. They might also expand existing burrows to accommodate the population that’s grown over the summer.
In winter, you’ll see less new digging because the ground might be frozen and rats are conserving energy. However, in areas with mild winters or during warm spells, rats might still dig.
Summer digging is usually lighter unless the population is growing rapidly or rats are expanding burrows to escape heat.
Why Rats Dig Near Human Buildings
You’ll often find rat burrows close to houses, sheds, garages, and other structures. This isn’t random. Buildings provide several advantages for rats.
The foundation creates a stable wall for the burrow. Rats can dig along the foundation and use it as one side of their tunnel, which means less digging work for them.
Buildings also block wind and weather, making the area near the foundation more comfortable. The south or west side of buildings often stays warmer, which rats like.
Many buildings have food sources nearby. Houses have garbage cans, pet food, bird feeders, and kitchen scraps. Sheds might store animal feed, seeds, or fertilizer. These food sources make the location perfect for rats.
The area under sheds and decks is especially attractive because it’s protected from above but still accessible from the sides. Rats will dig multiple entrances under and around these structures.
How Deep Rats Dig
Most rat burrows go down about 18 to 24 inches deep, though some can go deeper. The main living chamber is usually at the deepest point, where temperature is most stable and protection is best.
The depth partly depends on soil type. In soft, sandy soil, rats can dig deeper more easily. In hard or rocky soil, they stay shallower because digging deeper takes too much work.
Climate also matters. In areas with cold winters, rats might dig below the frost line (the depth where ground freezes) to keep their nesting area from getting too cold. In warmer areas, they don’t need to dig as deep.
The tunnels themselves aren’t perfectly straight down. They usually slope at an angle, which helps with drainage and makes it easier for rats to climb in and out.
What Rats Do With Excavated Dirt
When rats dig a burrow, they have to move a lot of dirt. A burrow system that’s 3 feet long and 2 feet deep with several chambers can displace several gallons of soil.
Rats push most of this dirt out through the entrance holes, which is why you see piles of loose dirt near burrow entrances. The dirt gets pushed out gradually as they dig, and rain and wind eventually spread it around.
Some rats are neater than others. Norway rats tend to leave obvious dirt piles, while roof rats (which do dig but prefer above-ground nesting) are sometimes more careful about scattering the dirt.
The dirt piles are actually useful for identification. Fresh, light-colored dirt means recent digging. Dark, settled dirt means the burrow is older or not actively being expanded.
How to Discourage Rats from Digging
Making your property less attractive for burrowing starts with removing what rats need. Cut back vegetation near buildings so there’s less cover for burrow entrances. Keep grass short and bushes trimmed up off the ground.
Remove debris, woodpiles, and junk that rats could dig under. Stack firewood at least 12 inches off the ground and away from buildings.
Make sure your soil is well-maintained. Compacted, hard soil is much harder to dig than loose, soft soil. In high-risk areas, you might even consider putting down gravel or stone barriers.
Fix any water problems that make soil soft and easy to dig. Poor drainage, leaky pipes, and over-watering create perfect digging conditions for rats.
Filling In Rat Holes
If you find rat holes, you might be tempted to just fill them in with dirt. This doesn’t really solve the problem though. Rats can easily re-dig filled holes, often within a day.
Before filling holes, you need to make sure no rats are inside. If you seal up occupied burrows, you’ll trap rats inside and they’ll either die (causing smell and hygiene problems) or dig new escape holes somewhere else on your property.
The proper approach is to first make sure the burrows are empty. You can use the newspaper test mentioned earlier. Once you’re sure no rats are using the burrow, fill it with soil and pack it down firmly.
For a more permanent solution, fill the hole with gravel or rocks first, then top with soil. The rocks make it much harder for rats to re-dig the same spot.
Better yet, address why rats chose that spot in the first place. Remove food sources, water access, and cover. Then fill the holes.
Conclusion
Rats dig holes in the ground to create underground burrows where they live, sleep, raise babies, and store food. These burrow systems protect them from predators and weather while keeping them close to food sources.
A typical burrow has multiple entrances (2 to 4 inches across), extends 18 to 24 inches deep, and can house 2 to 15 rats depending on size.
If you’re dealing with rat burrows on your property, focus on making the area less attractive by removing food sources, water access, and cover vegetation.
Fill holes only after making sure they’re not occupied, and use rocks or gravel to make re-digging harder. The key is addressing the conditions that attracted rats in the first place, not just filling in the holes they’ve already dug.
Hi, my name is Ezra Mushala, i have been interested animals all my life. I am the main author and editor here at snakeinformer.com.