Mouse in My House Right Now: What to Do

Last updated: April 9, 2026

By Pest Control Pricing Team

If you just saw a mouse run across your kitchen floor, your first thought is probably wondering if there are more. The answer is almost certainly yes. Mice are social animals that live in colonies of 6 to 12, and a single sighting usually means an active population has been living in your walls, attic, or basement for weeks. Here is what to do tonight. If you need help right now, call (866) 821-0263 to speak with a licensed exterminator.

This guide covers the immediate steps you should take tonight, how to check for a larger problem, the right way to set traps, which products to avoid, and when DIY is enough versus when you need a professional. For pricing details, see our mouse exterminator cost guide.

What Should I Do Tonight?

You do not need to wait until morning to take action. The steps below can be done right now, tonight, with items you likely already have in your home. Taking these steps immediately limits the damage mice can do overnight and gives you a head start on control.

Step 1: Secure all food in sealed containers or the refrigerator

Mice are in your home because they found food, water, and shelter. Removing their food source is the single most important step you can take tonight. Go through your kitchen and pantry and move everything into airtight containers, glass jars, or the refrigerator. This includes:

• Cereal, crackers, pasta, rice, and flour. Mice chew through cardboard boxes and thin plastic bags with ease. Transfer these to glass or heavy plastic containers with tight-fitting lids.
• Bread on the counter. Move it to the refrigerator or a sealed container. Bread bags offer no protection.
• Fruit on the counter. Mice eat fruit, especially overripe fruit. Refrigerate it or place it in a sealed container.
• Pet food. If you leave pet food out overnight, pick it up and store it in a sealed container. Pet food is one of the most common attractants for mice, and the bowl sitting on the kitchen floor is an easy target. Dog food bags should be stored in a bin with a lid, not left open in the garage or pantry.
• Trash. Make sure your kitchen trash can has a tight-fitting lid. If it does not, take the trash out tonight and switch to a lidded can.

Step 2: Check for droppings in key areas

Mouse droppings tell you where mice are active and how widespread the problem is. Grab a flashlight and check these areas:

• Inside the pantry. Look on shelves, behind items, and in corners. Check the floor of the pantry, especially along the back wall.
• Under the kitchen sink. This is one of the most common hotspots because it provides access to water (pipe condensation or small leaks) and often connects to wall voids.
• Behind the stove. Pull the stove out if you can do so safely. The area behind and beside the stove is a high-traffic zone for mice because food debris accumulates there and the warmth of the appliance is attractive.
• Behind the refrigerator. Same as the stove. The warmth from the compressor and food debris make this area a common travel path.
• Along baseboards. Mice travel along edges rather than across open floor space. Check the baseboard in the kitchen, dining area, and any room adjacent to where you saw the mouse.

What mouse droppings look like: Dark brown or black pellets, about the size of a grain of rice (1/4 inch long), with pointed ends. Fresh droppings are dark and soft. Old droppings are gray, dry, and crumbly. If you find droppings in only one location, the problem may be contained. If you find them in multiple rooms, you have a more significant infestation.

Important: Do not sweep or vacuum droppings without protection. Mouse droppings can carry hantavirus, which becomes airborne when disturbed. Wear gloves, spray the droppings with a disinfectant solution (or a mixture of 1 part bleach to 10 parts water), let it soak for 5 minutes, and then wipe up with paper towels. Dispose of the paper towels in a sealed bag.

Step 3: Set snap traps along walls in pairs

If you have snap traps available, set them tonight. If you do not have traps, pick some up first thing in the morning. Classic wooden snap traps or plastic snap traps both work well. Set them in the areas where you found droppings or saw the mouse. The correct placement is critical, and most homeowners get this wrong (see the detailed trapping section below).

Place traps in pairs, perpendicular to the wall, with the trigger end facing the baseboard. Mice run along walls, and this orientation means the mouse runs directly over the trigger. A single trap in the middle of the room will catch very little.

Step 4: Bait with peanut butter

Use a small amount of peanut butter, about the size of a pea, on the trap trigger. Peanut butter is the most effective bait for several reasons: it has a strong aroma that attracts mice from several feet away, it is sticky so mice cannot simply grab it and run (they have to work at it, which triggers the trap), and it is calorie-dense, which makes it irresistible to a foraging mouse.

Cheese is the traditional bait but is actually less effective. Mice can nibble small pieces of cheese off the trigger without setting it off. Peanut butter requires them to lick and pull at it, which almost always triggers the mechanism.

Step 5: Do NOT use poison if you have pets or children

Rodenticide bait (D-Con, Tomcat, and similar products) kills mice, but it creates serious secondary problems inside your home. Mice that eat poison do not die immediately. They return to their hiding spot, usually inside a wall void or under insulation, and die there. A dead mouse in your wall produces a terrible rotting smell that lasts 2 to 4 weeks and cannot be resolved without cutting into the wall. Even without pets or children, indoor poison is problematic. See the detailed section below for a full explanation.

Step 6: Do NOT seal any holes yet

Your instinct may be to find where the mouse is getting in and plug the hole immediately. Resist this urge for now. There are two reasons to wait:

• You may trap mice inside. If you seal their entry point while mice are still inside your walls, they are now trapped in your home. They will die in the walls (creating odor problems) or chew new exit holes, potentially through drywall, into living spaces.
• You probably have not found all the entry points. Mice use multiple entry points, and what you found may not be the primary one. Sealing one hole while leaving three others open accomplishes nothing. A professional exclusion inspection identifies all entry points before any sealing begins.

Exclusion (sealing entry points) is the most important long-term step, but it should happen after trapping has removed the active population, and ideally after a professional has inspected the entire exterior for gaps. For details on exclusion costs, see our rodent exclusion cost guide.

Does One Mouse Mean I Have an Infestation?

Yes, almost always. A single mouse sighting is rarely a single mouse. Here is why.

Mice are colony animals

Unlike some solitary pests, mice are social and live in groups. A typical mouse colony consists of one dominant male, several females, and their offspring. Colony sizes range from 6 to 12 mice in a small space, though larger colonies are common in homes with abundant food and shelter. When you see a mouse in your kitchen or living room, you are seeing one member of an established group.

You see them when the population is high

Mice are nocturnal and naturally cautious. A small colony of mice can live in your walls for weeks without you ever seeing one. They come out at night, travel along walls in darkness, eat, and return to their nests. You typically see a mouse during the day or in well-lit areas only when the population has grown large enough that competition for food forces individual mice to forage in riskier, more exposed locations. By the time you see one in your kitchen at 8 p.m., there are likely several more you have not seen.

The math is alarming

A single female mouse reaches sexual maturity at 6 weeks old. She can produce 5 to 10 litters per year, with each litter containing 5 to 6 pups. Her offspring reach maturity and begin breeding within 6 weeks. Starting with a single breeding pair that enters your home in October, you could theoretically have 50 or more mice by spring. In practice, factors like food availability and space limit population growth, but the reproductive potential is significant. This is why early action matters.

The only scenario where a single mouse might truly be alone is if it just entered your home very recently (within the past day or two) through an open door or garage. If you catch a mouse in a trap within 24 hours of first seeing it and find no droppings anywhere in your home, you may have caught the problem before it became an infestation. But this is the exception, not the rule.

How Did the Mouse Get In?

Mice can squeeze through gaps as small as 1/4 inch, roughly the diameter of a pencil. If you can slide a pencil into a gap, a mouse can fit through it. Their skulls are the widest part of their body, and they can compress their rib cages to fit through remarkably small openings.

Common entry points

• Gap under exterior doors. The most common entry point. If you can see daylight under your front door, back door, or garage entry door, a mouse can fit through that gap. Door sweeps wear out over time and many homes have gaps of 1/2 inch or more.
• Dryer vent. The exterior dryer vent flap often does not close completely, or the vent hose has come loose from the wall penetration, leaving an open hole into the home.
• Pipe penetrations. Where water supply lines, drain pipes, gas lines, and electrical conduit enter the home through the foundation or exterior walls, there is almost always a gap around the pipe. These gaps are typically sealed with caulk during construction, but caulk deteriorates over time.
• Foundation cracks. Cracks in poured concrete or gaps between concrete blocks in block foundations provide entry. These cracks may be tiny on the outside but widen inside the wall cavity.
• Garage door seals. The rubber seal along the bottom of a garage door wears out, cracks, and develops gaps, especially at the corners. Mice enter the garage and then access the living space through the interior garage door or wall penetrations.
• Utility line entries. Cable TV, internet, phone, and electrical service lines enter the home through the exterior wall. The holes drilled for these lines are almost always larger than the line itself, leaving a gap that mice can use.
• Roof-soffit junction. Where the roof meets the soffit, gaps can develop due to settling, wind damage, or deteriorating materials. Mice climb exterior walls, vines, and downspouts to reach these entry points and enter the attic.
• AC line penetrations. The refrigerant lines for your air conditioning system pass through the exterior wall, usually with a gap around them sealed with putty or foam that deteriorates over time.

For most homeowners, there are 5 to 15 potential entry points around the exterior of the home. Identifying and sealing all of them is the only permanent solution. This is what professionals call "exclusion work," and it is what separates a temporary fix from a permanent one. For more on this, see our rodent exclusion cost guide.

How Do I Check for More Mice Right Now?

A quick inspection tonight will tell you how widespread the problem is. You do not need any special tools, just a flashlight and 15 to 20 minutes. Focus on the areas where mice are most active.

Kitchen inspection

The kitchen is ground zero for most mouse infestations because it is where the food is. With your flashlight, check:

• Pantry shelves. Look for droppings, chewed packaging, and small piles of debris (crumbs, shredded paper, or shredded packaging material). Check behind items on every shelf and along the back wall.
• Under the kitchen sink. Open the cabinet doors and look along the back wall, around the pipes, and in all corners. Check for droppings, gnaw marks on the cabinet wood, and grease marks (mice leave dark smudge marks along surfaces they travel frequently).
• Behind the stove. If you can safely pull the stove forward a few inches, look behind it and along the wall. Check for droppings, grease marks on the wall, and gaps where pipes or gas lines penetrate the wall. The area between the stove and the counter is a common travel path.
• Behind the refrigerator. Same approach. Pull it forward if possible and check behind and beneath it. The compressor area underneath the fridge is warm, dark, and undisturbed, making it an attractive nesting area.
• Inside drawers. Check the backs of utensil drawers and especially the drawer cavities behind and beneath the drawers themselves. Pull drawers out completely if possible and look at the cabinet interior.

Basement and utility area inspection

If you have a basement, check along the walls where the foundation meets the floor. Look for droppings along the perimeter, especially near the water heater, furnace, and washer/dryer. Check around any stored boxes or items, as mice often nest inside or behind stored goods. Cardboard boxes are particularly attractive because mice shred them for nesting material.

Garage inspection

The garage is often the staging area for mice entering the living space. Check along the walls near the exterior doors, around stored items, and near any pet food or birdseed stored in the garage. Look at the bottom corners of the garage door for gaps in the seal. Check where the garage wall meets the house, particularly around the interior door.

Attic inspection

If you have safe attic access, check the insulation near the eaves for droppings, tunneling through insulation, and nesting material (shredded insulation, paper, or fabric formed into a ball). Mice in the attic are often heard as scratching or scurrying sounds at night, particularly during fall and winter when they seek warmth. For more on attic mice, see our guide on mice in the attic.

Reading the evidence

The distribution of droppings tells you the severity:

• Droppings in one location only: The population is likely small and contained. DIY trapping may be sufficient.
• Droppings in the kitchen and one adjacent area: You have a moderate problem. Set multiple traps and consider calling a professional if trapping does not resolve it within a week.
• Droppings in multiple rooms or on multiple floors: You have a significant infestation that likely requires professional intervention. Multiple travel routes and nesting sites mean the population is well established.

For help identifying what you find, use our pest droppings identifier tool or the pest identifier.

How Should I Set Traps Correctly?

Trap placement matters more than the trap itself. Most homeowners set traps incorrectly, which is why they catch one mouse and then the traps sit empty for weeks. Here is the strategy that professionals use.

The paired-trap strategy

Set snap traps in pairs, placed side by side, perpendicular to the wall. The trigger end of each trap should face the baseboard. Here is why this works:

• Mice run along walls. They rarely cross open floor space. They follow the edge of the wall, using it as a guide and for the security of having a wall on one side. Traps placed in the middle of the room catch almost nothing.
• Perpendicular orientation ensures contact. When the trap is set perpendicular to the wall with the trigger toward the baseboard, a mouse running along the wall runs directly across the trigger from either direction. If the trap is parallel to the wall, the mouse can run alongside it without stepping on the trigger.
• Pairs account for speed. Mice move fast. A single trap might miss a mouse that leaps over it or swerves at the last moment. A pair of traps placed side by side doubles the kill zone and catches mice that dodge the first trap.

Where to place traps

• Wherever you found droppings. Droppings indicate a travel path. Place traps directly in the path.
• Along walls in the kitchen. Focus on the wall behind the stove, along the baseboard between the stove and refrigerator, and along the wall under the kitchen sink.
• At suspected entry points. If you found a gap where a mouse might be entering, place traps on both sides of it.
• In the pantry. Place traps along the back wall of the pantry, on shelves if you found droppings there.
• In the basement or garage. Along walls where you found evidence of activity.

Bait and trigger technique

Apply a pea-sized amount of peanut butter to the trigger plate. Press it into the trigger so it fills the crevices. You want the mouse to have to lick and pull at the bait, not grab a chunk and run. Do not use too much bait, as mice can sometimes eat around the edges of a large dollop without engaging the trigger.

Some professionals recommend pre-baiting: setting traps with bait but not setting the trigger for the first night or two. This lets mice become comfortable eating from the trap. Then you set the trigger and catch them on the next visit. This technique works well for cautious mice that are avoiding traps.

How many traps to use

More traps is better. For a kitchen-only problem, start with 6 to 8 traps. For a whole-home problem, use 12 to 20 traps distributed across all areas of activity. Professional exterminators often set 20 to 30 traps on the first visit. Snap traps cost $1 to $3 each, so even 20 traps is a $30 to $60 investment.

Check traps daily

Check every trap every morning. Remove and dispose of caught mice (wear gloves, place in a sealed plastic bag, and discard in outdoor trash). Re-bait and reset traps. If a trap has been triggered but empty, reset it in the same location. If no traps fire after 3 nights, move them to new locations. Track how many mice you catch. This tells you whether the population is declining.

Why Are Glue Traps a Bad Idea?

Glue traps (also called glue boards or sticky traps) are widely available and inexpensive, but they are one of the worst options for mouse control. Here is why pest control professionals rarely recommend them for mouse removal.

They cause prolonged suffering

A mouse caught on a glue trap does not die quickly. It is stuck to the adhesive surface and struggles for hours or even days. The mouse may chew off its own limbs to escape, soil itself, and vocalize in distress. Eventually it dies from exhaustion, dehydration, or suffocation (if its face contacts the glue). This is widely considered inhumane by veterinary organizations and animal welfare groups. If you find a live mouse on a glue trap, you are faced with the difficult task of killing it yourself or trying to free it.

They are ineffective for populations

A glue trap catches one mouse at a time and is then used up. For an infestation of 6 to 12 mice, glue traps are impractical. Snap traps can be reset and reused indefinitely. A single snap trap can catch a dozen mice over the course of a few weeks.

Mice learn to avoid them

Mice are cautious and observant. When one mouse is caught on a glue trap and vocalizes in distress, other mice in the area learn to avoid that spot. This is called "trap shyness," and it makes subsequent trapping in that location much harder. Snap traps kill instantly, so there is no vocalization to warn other mice.

They catch non-target animals

Glue traps are indiscriminate. They catch anything that walks across them, including lizards, small snakes, songbirds, pet hamsters, and even cats or dogs that step on them. If you have pets or small children, glue traps pose an additional risk of a very messy and distressing encounter.

What to use instead

Classic snap traps remain the most effective, humane, and economical option for DIY mouse control. They kill instantly, they are reusable, they cost $1 to $3 each, and they can be set precisely in high-activity areas. If you prefer not to see the dead mouse, enclosed snap traps (like the Tomcat Press 'N Set) hide the mouse from view and allow you to dispose of it without touching it.

Why Should I NOT Use Poison Inside?

Rodenticide bait (mouse poison) is effective at killing mice, but using it inside your home creates problems that are often worse than the mice themselves. Here is why professionals avoid indoor poison for residential mouse control.

Dead mice in your walls

This is the primary reason to avoid indoor poison. Mice that eat rodenticide do not die immediately. They return to their nest, which is typically inside a wall void, under insulation, or in some other inaccessible space. They die there, and then they decompose. The smell of a decomposing mouse is intense, nauseating, and unmistakable. It lasts 2 to 4 weeks depending on temperature and humidity. You cannot mask it effectively, and the only way to remove it is to locate the carcass and extract it, which sometimes means cutting into drywall.

If you have 6 to 12 mice in your walls and they all eat poison, you will have 6 to 12 decomposing mice in various locations throughout your wall cavities. The smell can be overwhelming and may make certain rooms of your home unpleasant to occupy for weeks.

Dead mice attract secondary pests

A dead mouse inside a wall attracts carpet beetles, dermestid beetles, and blowflies, all of which feed on decomposing animal matter. Once these secondary pests establish themselves, you have a new pest problem to deal with on top of the original mouse problem. Carpet beetle larvae, in particular, can then spread to other areas of your home and damage clothing, carpet, and upholstered furniture.

Secondary poisoning risk

Pets and children are at risk in two ways. First, they may find and eat the bait itself, especially bait blocks that are placed in areas accessible to children or pets. Second, they may find a dead or dying mouse that has consumed poison. Dogs, in particular, will eat dead mice. The rodenticide in the mouse's body can cause secondary poisoning in the dog, potentially requiring emergency veterinary care. Cats that eat poisoned mice are also at risk.

It does not solve the entry point problem

Poison kills the mice currently in your home, but new mice will enter through the same entry points within weeks. Without exclusion work (sealing all gaps and openings), poison is an ongoing expense that never resolves the underlying problem. Trapping combined with exclusion is the permanent solution.

When poison is appropriate

Rodenticide bait has a role in mouse control, but it belongs outdoors, not inside your living space. Professional exterminators use tamper-resistant bait stations placed around the exterior perimeter of the home as a first line of defense. These stations are locked, heavy, and designed to prevent access by children, pets, and non-target wildlife. The bait inside kills mice before they enter the home. This is a component of a comprehensive exclusion and control program, not a standalone solution.

Do Ultrasonic Repellents Work?

No. Ultrasonic repellent devices are widely marketed as a clean, chemical-free, humane way to repel mice. They emit high-frequency sound waves that are supposed to drive rodents away. The problem is that they do not work, and this is not a matter of opinion. It is a conclusion supported by decades of scientific research.

What the research says

Multiple independent studies have evaluated ultrasonic rodent repellents:

• Cornell University conducted a review of ultrasonic rodent repellent research and found "no scientific evidence that ultrasonic devices repel rodents." Their researchers observed that mice initially reacted to the sound but habituated within days and resumed normal behavior.
• University of Nebraska-Lincoln researchers tested multiple ultrasonic devices and concluded they "should not be relied upon for rodent control."
• The Federal Trade Commission (FTC) has warned manufacturers of ultrasonic pest repellers about making unsubstantiated claims. In 2001, the FTC sent warning letters to over 60 companies marketing these devices, stating that claims of effectiveness were not supported by scientific evidence.

Why they fail

Even if ultrasonic sound initially startles mice, they habituate to it quickly, often within 24 to 48 hours. Mice in the wild are exposed to a constant barrage of sounds, and they are evolved to ignore non-threatening noises. The sound waves also do not penetrate walls, furniture, or other obstacles, meaning mice inside wall voids (where they spend most of their time) are completely unaffected.

What actually works

The three components of effective mouse control are: trapping (snap traps to remove the current population), exclusion (sealing all entry points to prevent new mice from entering), and sanitation (removing food sources so your home is less attractive). There are no shortcuts. Devices that promise effortless, chemical-free mouse control are taking your money without solving the problem.

When Is DIY Enough and When Should I Call a Pro?

Some mouse problems can be handled with snap traps and basic exclusion. Others require professional intervention. Here is how to know which category your situation falls into.

DIY is likely sufficient if:

• You caught 1 to 2 mice in the first 3 days of trapping
• Droppings are found in only one area (kitchen only, for example)
• You can identify and seal the entry point yourself (a visible gap under a door or around a pipe)
• No sounds in walls or attic
• No signs of nesting (shredded paper, fabric, or insulation)
• The problem does not return after sealing the entry point

Call a professional if:

• You have caught more than 3 mice and traps are still catching
• Droppings are found in multiple rooms or on multiple floors
• You hear scratching, scurrying, or squeaking sounds in walls or the attic
• The problem persists for more than 1 week despite active trapping
• You cannot identify where the mice are entering
• You see mice during the daytime (a sign of a large population)
• You find gnawed wiring, chewed food packaging, or other signs of significant activity
• You have a re-infestation after a previous attempt at exclusion

The biggest advantage of professional mouse control is exclusion work. A licensed exterminator will inspect the entire exterior of your home, identify every potential entry point, and seal them with appropriate materials (steel wool, copper mesh, metal flashing, hardware cloth, or concrete). This is the only way to permanently solve a mouse problem. DIY trapping without exclusion is a cycle: you trap the current mice, but new ones enter through the same gaps within weeks.

For more guidance on when professional pest control is the right call, see our guide on when to call an exterminator.

What Does Professional Mouse Removal Involve?

Professional mouse removal is more comprehensive than simply setting more traps. A reputable exterminator follows a structured process that addresses the current population, the entry points, and the conditions that attracted mice in the first place.

Step 1: Inspection

The technician begins with a thorough inspection of the interior and exterior of your home. Inside, they check all the areas described in the inspection section above, plus wall voids (using a stethoscope or listening device), crawl spaces, and attic areas. Outside, they walk the entire perimeter looking for entry points, paying special attention to foundation gaps, pipe penetrations, vent openings, and gaps where different building materials meet.

A good exterminator will tell you how many entry points they found, rate the severity of the infestation based on droppings volume and distribution, and provide a clear plan with pricing before any work begins.

Step 2: Strategic trap placement

The technician sets professional-grade snap traps (or, in some cases, multi-catch traps) in strategic locations throughout the home. Professional placements are based on the inspection findings, not guesswork. They use 20 to 30 or more traps placed in confirmed activity areas, travel paths, and near identified entry points. Some professionals use tracking powder or UV-fluorescent powder to identify travel routes that are not obvious from visual inspection.

Step 3: Exclusion (sealing entry points)

This is the most important step and the one that distinguishes professional service from DIY. The technician seals every identified entry point using materials that mice cannot chew through:

• Steel wool and copper mesh stuffed into gaps around pipes and utility lines
• Metal flashing over larger openings
• 1/4-inch hardware cloth over vent openings
• Concrete or morite for foundation cracks
• Door sweeps and weatherstripping for door gaps
• Expanding foam (professional grade, sometimes infused with copper mesh) for irregular gaps

Exclusion work typically takes 2 to 4 hours for a standard home and addresses 5 to 15 entry points. Some homes with significant foundation issues or older construction may have 20 or more entry points.

Step 4: Monitoring and follow-up

The technician returns 1 to 2 weeks after the initial service to check traps, assess whether new activity has occurred, and verify that the exclusion work is holding. Most professional mouse removal programs include 2 to 4 visits. If traps are still catching mice after exclusion, it indicates either a missed entry point or mice that were inside the home before exclusion was completed.

Step 5: Cleanup of contaminated areas

Some pest control companies offer cleanup services for areas heavily contaminated with mouse droppings and urine. This includes attic insulation replacement (if mice have been nesting in the insulation), disinfection of surfaces, and removal of nesting material. This is especially important in attics, where mouse droppings in insulation can create a health hazard.

How Much Does a Mouse Exterminator Cost?

Professional mouse removal pricing depends on the severity of the infestation, the scope of exclusion work needed, and whether you need one-time service or ongoing monitoring.

Is professional mouse removal worth the cost?

For most homeowners, yes. The cost of professional trapping and exclusion ($500 to $1,500) is a one-time investment that permanently solves the problem. Compare that to the ongoing cost of DIY trapping without exclusion, where you buy traps every few months, spend your evenings checking and resetting them, and never fully resolve the issue because new mice keep entering.

Mice also cause real financial damage while they are in your home. They chew wiring (fire risk), contaminate food (waste), damage insulation (energy cost), and can cause health problems (medical costs). The average homeowner deals with $200 to $500 in indirect mouse damage before addressing the problem. For a detailed cost breakdown, see our mouse exterminator cost guide and rodent exterminator cost guide.

Getting quotes

Get estimates from at least three pest control companies. A reputable company will offer a free or low-cost inspection and provide a written estimate that breaks down the cost of trapping and exclusion separately. Be wary of companies that quote a flat fee over the phone without inspecting your home, as the true scope of the problem can only be assessed on-site.

Ask about guarantees. Most reputable mouse exterminators guarantee their exclusion work for 1 to 2 years: if mice re-enter through a sealed entry point during that period, they return to seal it at no additional cost.

Frequently Asked Questions

What to Do Next

If you just saw a mouse in your house, here is your action plan:

1. Tonight: Secure all food, check for droppings in key areas, set snap traps in pairs along walls with peanut butter bait.
2. Tomorrow morning: Check traps. Note where you found droppings. Do a more thorough inspection of the basement, garage, and attic. Buy additional traps if needed (aim for 6 to 8 minimum, more for multi-room problems).
3. Within 3 days: If traps are catching mice, continue trapping. If you have caught more than 3, or if droppings are in multiple rooms, call a professional for an inspection.
4. Within 1 week: If the problem persists despite active trapping, call a professional. The longer you wait, the larger the population grows and the more damage occurs.
5. After the problem is resolved: Complete exclusion work (sealing all entry points). Maintain sanitation practices. Consider an annual inspection to catch new gaps before mice do.

The most important thing to remember is that mice do not leave on their own. A small problem becomes a large one quickly thanks to their rapid reproduction. Early action, whether DIY trapping or a call to a professional, saves you time, money, and frustration. If you need help right now, call (866) 821-0263 to connect with a licensed exterminator in your area.

For more information, explore these related guides:

• Mouse Exterminator Cost: 2026 Pricing Guide
• How to Get Rid of Mice: Complete Guide
• Rodent Exterminator Cost
• Rodent Exclusion Cost
• Mice in the Attic: What to Do
• Pest Droppings Identifier
• Pest Identifier Tool
• When to Call an Exterminator
• Pest Control Cost Guide