Mice Exterminator: What They Do, What It Costs and How to Hire One

When do you need a mice exterminator?

You need a mice exterminator when careful trapping has not stopped the fresh droppings, when you cannot find or reach the holes the mice are using, or when the mess is too widespread to clean up yourself. The CDC's trapping guidance tells homeowners to check the bait every week and refill or move it for at least 15 days and, if trapping does not resolve the infestation, to consider a poison bait station or seek professional help. The EPA draws the same line in its tips for selecting a pest control service: many household pest problems yield to sanitation and home maintenance, but an extensive infestation or a hard-to-control pest can require a company.

• Trapping has stalled. New droppings or gnaw marks keep appearing after the 15 days the CDC gives as the minimum for keeping baited snap traps out.
• The signs point to a long stay. The University of Nebraska's house mouse guide ties a musky odor to long-term presence, and it lists scratching and squeaking inside walls and ceilings as a sign of mice you cannot see.
• Activity shows up in more than one part of the house. The same guide says mice seldom venture more than 50 feet from their shelter and food supply, so signs at opposite ends of a large house are a reason to suspect more than one nesting area.
• You cannot do the sealing. Nebraska's guide says to eliminate every opening 1/4 inch or larger, and some of them may need a ladder or a trip into a crawl space.
• The contamination is heavy, or the mice may be deer mice. Nebraska advises extra protective measures where droppings are substantial or spread over a large area, or where deer mice or white-footed mice, the known hantavirus carriers, have been identified. A separate guide explains how deer mice differ from house mice.
• The population is outpacing you. By the Nebraska guide's figures, a female house mouse in ideal conditions can raise 5 to 10 litters of 5 to 6 young a year, and the young reach breeding age in 6 to 10 weeks, so finding a nest of baby mice is a sign the count can climb quickly.

A single mouse seen once, with a few fresh droppings in one room, is usually a trapping job you can try first. The CDC notes that house mice and deer mice are less cautious than rats and may be trapped more quickly, and the EPA points out that most pest problems can wait a few days while you compare companies. The complete mouse control guide walks through the seal up, trap up, clean up sequence if you want to start there.

What does an exterminator do for mice?

On a mouse job, an exterminator inspects the building, removes the mice with traps and sometimes rodenticide bait, closes the holes they came through, and comes back until the activity stops. The University of Nebraska sums up effective control as sanitation, exclusion and population reduction. A professional service is the last two of those, done by someone with training, the right materials and access to products the public cannot purchase. Exterminator, pest control company and pest management professional are names for the same licensed trade, so a search for mice pest control leads to the same service.

Inspection and identification

The first visit starts with an inspection, not with traps. Nebraska's guide says to begin within 50 feet of food in spots that offer warmth and shelter, and it names appliances that run constantly, such as refrigerators, water heaters and furnaces, as favorite den sites. The technician is looking for droppings 1/8 to 1/4 inch long that taper to a point at one or both ends, fresh gnaw marks, nests of finely shredded paper and the gaps the mice use to get in. If you want to check before the visit, another page shows what mouse droppings look like and how to tell fresh from old.

A good inspector also tells you which animal you have. NPIC's checklist for selecting a pest control company asks whether employees can identify the pest, explain the extent of the infestation and give details about the pest and its behavior. That matters with mice because the house mouse is not the only species that comes indoors, and Nebraska's guide calls for more caution during cleanup when deer mice or white-footed mice are involved. The guide to the types of mice found in US homes shows how to tell them apart.

Trapping

Traps do most of the work in a house. Nebraska calls trapping the preferred method in homes, schools and hospitals because it uses no pesticide, shows its results and lets carcasses be removed before they cause an odor, and the CDC recommends traditional snap traps. Numbers and placement decide the result: Nebraska says successful trapping depends on identifying where the mice are living and using a sufficient number of traps. Its rough guide is two dozen properly placed snap traps for a new infestation in a 1,500-square-foot structure, spaced no more than about 10 feet apart where mice are active, set close to walls, and doubled up where activity is high.

Nebraska's guide also describes multiple-catch traps and glue boards as options. The CDC takes a stricter line for homes: it advises against glue traps and live traps because a frightened rodent urinates, which can raise the chance of getting sick. The two sources disagree on glue boards, so tell the company up front if you want snap traps only. The guide to mouse trap types and where to place them compares each kind.

Rodenticide bait, when it is used

Bait is the second-line tool, and the products a professional uses are not the ones on a store shelf. The EPA's restrictions on rodenticide products limit the consumer market to ready-to-use bait stations whose bait contains bromethalin, chlorophacinone or diphacinone. The second-generation anticoagulants (brodifacoum, bromadiolone, difenacoum and difethialone) are registered only for the commercial and structural pest control markets, and professional products may not be sold in consumer stores.

According to the EPA, the labels on professional bait require tamper-resistant stations anywhere children under six, pets or nontarget wildlife have access, and for every outdoor above-ground placement. The CDC says to use poison or bait stations only for infestations that persist. Nebraska adds two cautions worth raising with the technician: bait around food preparation areas is not advised, and nobody can predict where a poisoned mouse will die, so an odor from inside a wall is possible. The guide to mouse poison and its risks explains the active ingredients and what they mean for pets and wildlife.

Sealing the entry points

Exclusion is the part that keeps the job from repeating. House mice squeeze through openings slightly larger than 1/4 inch, and Nebraska's guide calls mouse-proof construction a key element of control. Its method: close every opening 1/4 inch or larger, seal gaps under 1/2 inch around pipes with sealant or mortar, pack larger gaps with copper mesh or stainless steel fiber before sealing, and cover bigger holes with wood, aluminum flashing, concrete or 1/4-inch wire mesh. Soft materials such as latex, plastic, rubber and boards under 1/2 inch thick are listed as unsuitable.

Ask whether sealing is included in the quote, because HomeGuide lists exclusion as work that adds to the total. For the small gaps you can close yourself, see how to pack holes with steel wool or copper mesh.

Follow-up visits and cleanup

The job is not finished on day one. Someone has to check traps, remove dead mice, add traps and re-inspect, and the CDC says traps should be checked daily. A company that returns once a week is leaving the days in between to you, so settle who checks and empties traps before work starts. Nebraska notes that a continuing trapping program should add clean or new traps, because research found that female house mice avoid traps that have caught dominant males. Ask whether removing nests and droppings is included, because HomeGuide's estimates pair small and medium jobs with minimal cleaning and only large ones with full sanitizing. The page on mice removal and cleanup covers what that sanitation step involves.

How much does a mice exterminator cost?

A mice exterminator costs $150 to $550 on average, with a national average of $350, according to HomeGuide's mice exterminator cost guide, dated September 2025. HomeGuide says its figures come from research and from project costs reported by its members. They are national estimates from one published cost guide, not quotes, so use them to judge whether a local price is in the normal range.

The top of the range reflects repair and cleanup on top of extermination: HomeGuide's large-infestation total includes repairs and full sanitizing. It puts cleaning a crawl space after a large infestation at $1,500 to $4,000 on its own, and it prices repairs to wiring, ductwork and attic insulation separately. Its list of cost factors also includes the size and age of the home, how hard the infested areas are to reach, and the local market. For typical prices by pest and by visit schedule, see the wider guide to how much pest control costs.

Is a one-time visit or an ongoing plan better for mice?

For a house that can be sealed, a one-time job that includes exclusion and follow-up visits fits what the sources recommend, and an ongoing plan makes sense mainly where mice cannot be shut out. The EPA says routine pesticide applications in and around a home are not a good idea unless the infestation is constant and non-chemical methods have failed. It adds that a homeowner's service contract should include periodic inspections, with pesticide applied only when the pests are present and cannot be controlled another way. Nebraska's guide recommends bait stations in and around the perimeter of buildings where it is impossible to exclude rodents.

NPIC's checklist puts the contract questions plainly: does the company require a long-term contract, what are the long-term costs, and can it offer a guarantee, and on what terms? Get the answers in writing along with the estimate.

How do you check an exterminator's license?

Ask the company for a copy of its pest control license, then confirm it by calling your state pesticide regulatory office or department of agriculture. The EPA says each company must have at least one certified, licensed commercial pesticide applicator in the proper service category, and that its other applicators must be certified applicators or licensed technicians working under a certified applicator's direct supervision. It also says reliable applicators will show their credentials and hand over copies of the pesticide labels.

1. Ask for the license number and the name of the certified applicator responsible for your job.
2. Find the right state office. NPIC's page on selecting a company links to a directory of state pesticide regulatory agencies, and NPIC answers questions at 800-858-7378.
3. Confirm that the license is current and that it is the correct classification for household rodent work.
4. Ask the same office, or the Better Business Bureau, about recent violations, complaints or unresolved issues.
5. Ask the company whether it carries insurance that covers you, your property and its employees, which is on NPIC's safety checklist.

The EPA calls the verifying office the state department of agriculture and NPIC calls it the state pesticide regulatory office. Which agency it is depends on the state, and that office is the authority on what license a mouse control company needs where you live. A company that claims to be endorsed by the EPA or a state agency is waving a red flag: the EPA states that government agencies do not endorse any service company.

What should you ask before hiring an exterminator for mice?

Get several written estimates and put the same questions to each company about its findings, its methods, its follow-up and its guarantee. The EPA advises obtaining several estimates and notes that most companies provide them free.

• What did you find, and which species is it? The answer should name the entry points and the areas of activity, not just the number of traps.
• Will you trap, bait or both, and why? If bait is planned, ask for the product names, the EPA registration numbers and copies of the labels.
• Is sealing the entry points included? Ask which holes will be closed and with what materials.
• How many follow-up visits are included, and who checks the traps in between?
• Is cleanup of droppings and nests part of the price?
• What does the guarantee cover if mice return, and for how long?
• Is a long-term contract required, and what does it cost over the full term?
• How many years have you been in business, and can I call references? Both are on the EPA's list of questions.

The EPA also lists sales tactics to beware of. They include a special price if you agree to treatment immediately, pest control offered as a package with general home repair or tree trimming, no listed or working phone number, door-to-door selling, pressure to sign a contract on the spot and claims of a secret formula.

Be cautious about paying for gadgets, too. Nebraska's guide reports that researchers have found little evidence that electronic, sound, magnetic or vibrating devices drive established mice out of buildings, a finding covered in more depth in the review of whether ultrasonic pest repellers work. Before paying for a scent treatment, read the overview of mouse repellents and the evidence for each type.

How long does it take an exterminator to get rid of mice?

Plan on at least two weeks for even a small mouse job, because the CDC says to keep checking and refilling baited traps for at least 15 days, and expect a severe infestation to take several months by HomeGuide's estimate. The quick part is catching the first mice. The slow part is confirming the house is clear: the CDC's test is a week with no rodents captured and no new signs of them.

Anticoagulant bait is slower than trapping by design. Nebraska explains that the delay keeps mice from linking the bait to feeling sick and then avoiding it. HomeGuide adds that removing a single mouse may take only one or two visits. If activity continues past the timeline you were quoted, ask the company to re-inspect for an entry point that was missed.

What do you still have to do yourself?

Food storage, clutter and day-to-day monitoring stay with you, and they decide whether the result lasts. Nebraska's guide warns that any neglect of sanitation will cause even the most aggressive control efforts to fail, because house mice reproduce so quickly. It also says sanitation alone almost never eliminates mice, so your part supports the exterminator's work and does not replace it.

• Prepare the house. The EPA says to follow the service person's instructions, such as removing items from the floor and emptying kitchen cabinets before the visit, and NPIC adds putting away clutter and keeping children and pets away from the area.
• Lock up food. Keep food, including pet food, in tight-fitting bins, clean up spills, and remove or modify bird feeders.
• Remove shelter. Clear debris and restack woodpiles and stored goods, keeping them at least 8 inches off the ground and at least 1 foot from walls so mice have less cover and inspections are easier.
• Leave the equipment alone. Do not move traps or stations, check traps on the schedule you agreed to, and keep traps and bait out of reach of children and pets, as the CDC advises.
• Clean up droppings the right way. Nebraska's guide says to wear gloves, spray the droppings with disinfectant until wet, wipe them up with a wet towel, rag or mop, and never use a household vacuum or broom on them.
• Check the seals every year. Nebraska's guide says doors, windows and screens should fit tightly, so walk the exterior before cold weather using this checklist for keeping mice out of a house in winter.

If you feel ill or develop a fever after handling mice or their droppings, contact a healthcare provider and mention the exposure. For a small problem you decide to handle on your own, the rodent control product guides cover traps, bait stations and exclusion materials.

Frequently Asked Questions

Sources

1. Tips for Selecting a Pest Control Service — US Environmental Protection Agency
2. Restrictions on Rodenticide Products — US Environmental Protection Agency
3. How to Trap Up to Remove Rodents — Centers for Disease Control and Prevention
4. G1105: Controlling House Mice — University of Nebraska-Lincoln Extension
5. Selecting a Pest Control Company — National Pesticide Information Center
6. How Much Does a Mice Exterminator Cost? (2026) — HomeGuide

How this guide was made: it was researched and drafted with AI assistance from the sources listed above. A second, independent AI pass then checked each factual claim against those sources. Found an error? Email support@buzzskito.ca.