Norway Rats in Utah

Norway rats are one of the most troublesome rodents found in Utah. They are larger and more destructive than house mice and can cause extensive damage to homes, yards, and stored goods. These rats are strong burrowers that thrive wherever food, water, and shelter are available. Here’s what you should know about Norway rats and how to keep them away from your property.

What Norway rats look like

Norway rats are large, heavy-bodied rodents that typically measure 7 to 9 inches in body length, with tails that are slightly shorter than their bodies. Their fur is coarse and brownish-gray, and they have small ears, blunt noses, and thick bodies. Unlike roof rats, which prefer to climb, Norway rats are more comfortable on the ground and often build burrows around foundations, gardens, and under debris.

Where you might find them

You are most likely to find Norway rats in basements, crawl spaces, and lower levels of buildings. Outdoors, they dig burrows in soil, under sidewalks, around garbage bins, or near wood piles. They are nocturnal and tend to stay close to their nests, often traveling the same paths along walls and fences. Signs of infestation include gnaw marks, droppings, grease stains, and scratching or scurrying noises at night.

Why Norway rats are a concern

Norway rats are a serious health and safety concern. They can spread diseases such as leptospirosis and salmonella through their droppings and urine. Their constant gnawing damages wood, insulation, and electrical wiring, which increases the risk of fires and costly repairs. They are also aggressive chewers that can damage food packaging and stored goods, making contamination a common problem.

How to get rid of Norway rats

Preventing Norway rats starts with removing food sources and blocking entry points. Store food in sealed containers, keep trash bins closed, and clean up pet food promptly. Seal holes and gaps around foundations, pipes, and vents using heavy materials such as steel mesh or concrete. Outdoors, reduce clutter and trim vegetation close to the house to eliminate hiding spots.

Because Norway rats are cautious and often avoid traps, infestations can be difficult to handle without professional help. A pest control specialist can identify nesting areas, remove existing rats safely, and apply targeted treatments to prevent their return.

Need help getting rid of Norway rats?
Contact Stewart’s, your trusted Utah pest control experts.