How to Get Rid of Mice and Rats: Step-by-Step (2026)

Quick answer: Combine exclusion, trapping, and sanitation. Inspect for and seal accessible entry points, use appropriately sized traps along rodent travel routes, and remove food, water, and shelter. Identify mice versus rats first because trap size and behavior differ. Results and timing vary; recurring activity, inaccessible spaces, contamination, or wiring damage can justify professional help.

Rodent populations can grow quickly when food, water, shelter, and entry routes remain available. Rodents can damage wiring, drywall, and insulation and contaminate food or surfaces with droppings and urine. This guide explains a practical sequence for reducing activity and repeat entry, but no DIY or professional method can promise that a building will remain rodent-free permanently.

Rodent control generally works best when exclusion, trapping, and sanitation happen together. Trapping without addressing entry routes can leave the building open to new animals, while sealing without accounting for rodents already inside can create other problems. Below is a step-by-step plan, plus how to distinguish mice from rats and when the job may be bigger than DIY.

Coordinate exclusion and trapping. Before closing an opening, check for signs that animals are still using it and avoid sealing rodents inside an occupied space. Continue sanitation and monitoring afterward, since new gaps and outside pressure can create future activity.

First, identify what you are dealing with

Treatment differs by species, so confirm whether you have mice or rats before you buy traps. Droppings are the fastest tell: mouse droppings are small, rice-sized, and pointed; rat droppings are larger, the size of a raisin or bean. Mice are curious and will investigate new objects quickly, so they are easier to trap fast. Rats are neophobic, meaning they avoid new things for days, so they need patience and larger, stronger traps.

Step 1: Seal entry points (exclusion)

Exclusion is the single most important step, and the one most people skip. A mouse fits through a gap the size of a dime, so walk your home's exterior and interior looking for openings around utility lines, pipes, dryer vents, the garage door, the foundation, and where the roofline meets the walls. Seal small gaps with a combination of steel wool or copper mesh packed into the hole and then caulk or sealant over it, rodents can chew through foam and plain caulk alone, but not metal. Use hardware cloth over larger openings and vents, and add door sweeps to exterior doors.

• Pack steel wool or copper mesh into gaps, then seal over it so rodents cannot pull it out.
• Cover vents, weep holes, and larger openings with quarter-inch hardware cloth.
• Install door sweeps on exterior and garage doors; the gap under a garage door is a top entry point.
• Seal around pipe, cable, and gas-line penetrations where they enter the wall.
• Check the roofline, soffits, and chimney, rats in particular enter from above.

Step 2: Trap effectively

Snap traps are a common DIY option when they are sized, placed, and used according to their instructions. One or two traps may not cover multiple travel routes, so place an appropriate number along walls or other locations with droppings, rub marks, or confirmed activity while keeping traps inaccessible to children and pets.

• Use multiple snap traps and place them along walls where droppings or rub marks appear, with the trigger end facing the wall.
• Use only a small amount of suitable food bait, such as peanut butter where allergens are not a concern, and follow the trap manufacturer's directions.
• For wary rats, set baited but unset traps for a few days first so they get comfortable, then arm them.
• Check and reset traps daily until activity stops completely, not just slows down.
• Wear gloves when handling traps and dispose of rodents in a sealed bag.

Glue boards can cause prolonged suffering and may catch non-target animals. Rodenticides can expose children, pets, and wildlife, and poisoned rodents may die in inaccessible spaces. If considering a pesticide, first check whether it is legal and appropriate for the site, follow the label exactly, and consider a properly credentialed professional for placement and monitoring.

Step 3: Remove food and shelter

Food, water, and cover can support rodent activity. Reducing those resources can make the property less attractive and improve monitoring, though sanitation alone does not close entry points. Store pantry staples and pet food in sturdy sealed containers, clean spills, manage trash, and avoid leaving pet food out overnight. Outside, move debris away from the structure, trim vegetation touching walls, and manage bird seed near the foundation.

• Store food and pet food in sealed, gnaw-proof containers.
• Clean up crumbs and spills daily; do not leave dishes or pet bowls out overnight.
• Declutter garages, basements, and attics to remove nesting cover.
• Move woodpiles, compost, and debris well away from the foundation.
• Fix leaks and remove standing water; rodents need a water source too.

How long should it take?

There is no reliable universal timeline. A small mouse problem may show declining trap activity within days or weeks, while rats, multiple entry routes, shared buildings, and inaccessible nesting areas can take longer. Continue checking for fresh droppings, trap activity, sounds, and new gaps. If signs persist despite careful trapping, sanitation, and exclusion, consider a professional inspection rather than assuming the problem is solved on a fixed date.

When to call a pro

Consider professional help for inaccessible wall or ceiling activity, droppings across several rooms, a persistent odor, damaged wiring, heavy contamination, recurring signs, or a problem you cannot address safely. A provider may offer inspection, trapping, exclusion, or cleanup, but those services and warranties are not automatic. Ask for the identified entry points, methods, visit schedule, cleanup scope, limitations, and warranty in writing. For planning ranges and quote structure, see our rodent control cost guide.

When you hire, ask the right questions and confirm the credential and category required for the work. PestPin shows a source-linked license-record match as processed, not a live status, rodent-category, insurance, or quality guarantee. Our guide on how to choose a pest control company covers exactly what to ask. If rodents are part of a wider pest problem, the general pest control cost guide explains bundled pricing.

Find a rodent control company with a checkable license record

If the rodents keep coming back or you are dealing with rats or wall activity, get help. Compare rodent control companies with source-linked license records near you and submit a free request offered to one eligible provider at a time, never sold as a shared lead. Acceptance, contact, and a quote are not guaranteed. You can also browse all local pest control companies or start from our general pest control hub. Run a rodent control business and want to learn about PestPin's request channel? List your business on PestPin or review plans for pros.