Mice and Rats in Maryland: Signs, Entry Points, and How to Get Rid of Rodents

Rodents are one of the most common year-round pest problems in Maryland. Mice and rats can contaminate food, damage wiring and insulation, and spread quickly once they find warmth, water, and shelter. The good news: with the right inspection and exclusion plan, you can stop an infestation and prevent it from coming back.

Mice vs. rats: what’s the difference?

Both are destructive, but they behave differently. Mice are smaller and can squeeze through openings as small as a dime. Rats are larger, stronger, and often travel along walls and lower levels like basements, crawlspaces, and garages. Identifying which one you’re dealing with helps determine the best control strategy.

Common signs of a rodent problem

• Droppings in cabinets, pantries, basements, or along walls

• Scratching or scurrying sounds at night (walls, ceilings, attic)

• Gnaw marks on food packaging, wood, or wiring

• Grease rub marks along baseboards or entry routes (more common with rats)

• Nesting material (shredded paper, insulation, fabric)

How rodents get into Maryland homes

Rodents don’t need much space to get inside. The most common entry points include gaps around utility lines, garage door corners, damaged door sweeps, foundation cracks, attic vents, and openings where siding meets brick or trim.

Quick prevention checklist

• Seal gaps and holes with rodent-proof materials (metal mesh, steel wool, proper sealants)

• Store food in sealed containers and clean crumbs/grease regularly

• Fix leaks and reduce moisture in basements/crawlspaces

• Trim vegetation away from the home and keep storage off the floor

• Secure trash lids and avoid leaving pet food out overnight

Why DIY rodent control often fails

Traps and bait can reduce activity, but if entry points aren’t sealed, rodents keep coming back. In multi-level homes and commercial spaces, rodents may also nest in hard-to-reach areas. A professional approach focuses on inspection, exclusion, targeted trapping/baiting, and follow-up.

Need help now? Visit our service page: Rodent Control.

Rodent control in Maryland

Pest Express DMV provides rodent inspections, trapping, and exclusion services across Maryland. If you’re seeing signs of mice or rats, contact us to schedule service and protect your home or business.