Professional exterminators get rid of mice through a multi-step process: inspecting your home to find entry points and activity zones, trapping or baiting to eliminate the existing population, and sealing gaps to prevent new mice from getting in. Most rodent control programs cost between $200 and $600 and require multiple visits over several weeks to fully resolve the problem.
The Inspection Comes First
Before setting a single trap, a professional exterminator performs what the industry calls a 360 inspection. They check every level of the home, from under appliances and furniture at floor level to drop ceilings, pipe runs, and attic spaces overhead. They’re looking for physical evidence: droppings, gnaw marks, footprints, and oily brown streaks along walls and baseboards. Those streaks are sebum marks, a buildup of oils from mouse fur that accumulates along pathways mice use repeatedly. The pattern of these signs tells the exterminator how many mice are likely present, where they’re traveling, and where they’re nesting.
Some exterminators conduct nighttime inspections or set up wildlife cameras, since mice are most active after dark when the house is quiet. This step matters because it shapes everything that follows. Placing traps blindly in a kitchen won’t solve the problem if the main colony is nesting in a wall void two rooms away.
Trapping: The Primary Tool
Snap traps remain the workhorse of professional mouse control. Exterminators place them directly along identified travel routes, usually tight against walls where mice feel safe running. Professionals typically use more traps than a homeowner would think to set, sometimes a dozen or more in a moderate infestation, because mice rarely travel far from their nest. Traps are checked and reset over multiple visits, and the exterminator adjusts placement based on what’s catching and what isn’t.
Glue boards and multi-catch stations are also common. Multi-catch traps can capture several mice without resetting and are useful in commercial settings or areas with heavy activity. The advantage of trapping over poison is that dead mice are accounted for immediately rather than dying inside walls where they create odor problems.
When Rodenticides Are Used
Exterminators sometimes turn to poison baits, particularly for large or persistent infestations. The most common type is anticoagulant bait, which works by blocking the body’s ability to recycle vitamin K. Without vitamin K, the blood loses the ability to clot. The mouse’s stored supply runs out over several days, and fatal internal bleeding follows. This delayed effect means mice don’t associate the bait with danger, so they keep feeding.
Non-anticoagulant options work faster through different mechanisms. One type shuts down energy production in nerve cells, causing brain swelling and paralysis. Another delivers a toxic dose of vitamin D3, flooding the bloodstream with calcium and damaging the kidneys and cardiovascular system. These are typically reserved for populations that have developed resistance to anticoagulant baits or for situations where quick knockdown is needed.
Federal regulations require that all rodenticide baits be placed inside tamper-resistant bait stations whenever children under six, pets, or non-target wildlife could access them. This applies to every outdoor above-ground placement and most indoor ones. The stations are heavy, lockable plastic or metal boxes that a child or dog can’t easily open. Pelletized bait is generally avoided around homes with children or pets because pellets can be dropped by mice in transit and picked up by someone else.
Sealing Entry Points
Killing the mice already inside your home is only half the job. A mouse can squeeze through a hole the size of a dime, so exclusion work (sealing every gap, crack, and opening) is what separates a temporary fix from a lasting solution. This is often the most labor-intensive and expensive part of the process.
Exterminators typically seal entry points with a combination of materials:
- Steel wool or knitted stainless steel mesh for gaps around pipes and irregular openings, because mice can’t gnaw through metal
- Caulk and multipurpose sealants for cracks in foundations, walls, and around pipe intrusions
- Door sweeps on garage doors and exterior doors where gaps exist at the threshold
- Vent covers on dryer vents, stove vents, and attic or gable vents
- Chimney caps to block roof-level access
- Plumbing caps on any accessible open pipes
A full exclusion job means working from the interior, the exterior, and the attic. Professionals inspect the entire roofline, seal gaps where utility lines enter the home, and address any structural deterioration that has created new openings. The materials used need to resist corrosion, weather exposure, and persistent gnawing.
What the Follow-Up Visits Involve
Mouse control is not a one-visit service. Most programs include multiple return visits over several weeks. During each follow-up, the exterminator checks traps, removes dead mice, refreshes bait stations if applicable, and looks for fresh signs of activity like new droppings or gnaw marks. They may reposition traps based on changing activity patterns.
The goal of these visits is confirmation. A single week without catches doesn’t mean the problem is solved, since mice reproduce quickly and a small remaining population can rebound. Exterminators look for a sustained absence of all activity signs before closing out a treatment. Some companies also install monitoring stations, basically traps or tracking devices left in place long-term, that give early warning if mice return.
Cost and Timeline
A typical rodent control program runs between $200 and $600. Where you fall in that range depends on the scope of work. A straightforward job with a few entry points and a handful of snap traps costs less than a full exclusion that involves inspecting the roofline, sealing a dozen access points, and maintaining a network of monitoring stations over time.
From start to finish, expect the process to take several weeks. The initial visit handles the inspection, trap placement, and sometimes preliminary sealing. Follow-up visits at one- to two-week intervals handle trap checks, bait refreshes, and additional exclusion work. Complete resolution, meaning zero signs of activity over consecutive visits, typically takes three to six weeks for a moderate infestation. Severe cases or homes with extensive structural gaps can take longer, particularly if the exclusion work is complex.
Why DIY Often Falls Short
The reason homeowners struggle with mice isn’t usually a lack of traps. It’s incomplete knowledge of the problem. Setting two snap traps under the kitchen sink addresses one symptom while ignoring the entry point under the dishwasher line, the gap around the dryer vent, and the colony nesting in the crawlspace. Mice also breed fast. A female mouse can produce five to ten litters per year, so a small problem becomes a big one in weeks if the source isn’t cut off.
Professionals bring diagnostic skill (knowing where to look and what the signs mean), access to commercial-grade exclusion materials that resist gnawing, and the follow-through of repeated visits to verify the population is actually gone. The exclusion work alone, done thoroughly, is what most homeowners can’t replicate without experience.