Exterminators inspect your home for pests, identify the species causing problems, determine how they’re getting in, and then apply targeted treatments to eliminate them. A typical visit costs between $100 and $600 for a one-time treatment, though many pest control companies now offer ongoing plans that shift the focus from killing pests after the fact to preventing them from showing up in the first place.
The job has evolved significantly. While “exterminator” still gets used casually, most professionals today operate as pest management technicians, using a broader toolkit that goes well beyond spraying chemicals in your baseboards.
The Initial Inspection
Every job starts with a thorough inspection, and this step often takes longer than the treatment itself. A technician will walk the exterior of your property first, checking the foundation, walls, windows, doors, and roofline for entry points and signs of activity. Cracks in the foundation, gaps around pipes, damaged weather stripping, and holes in soffit vents are all common findings.
Inside, the focus shifts to areas where pests tend to congregate: kitchens, bathrooms, attics, basements, and crawl spaces. The technician is looking for droppings, nests, damaged wood, grease marks along walls (a telltale sign of rodent pathways), shed insect skins, and staining that indicates ongoing activity. For suspected termite problems, they may use moisture meters, thermal cameras, or probes to detect colonies hidden inside walls or under flooring that wouldn’t be visible otherwise.
Based on what they find, the technician identifies the pest species, estimates the severity of the infestation, and builds a treatment plan. This matters because different pests require completely different approaches.
How Treatment Varies by Pest
There’s no single “extermination” method. What a technician does in your home depends entirely on what’s living there.
For cockroaches, the standard approach involves gel baits placed in cracks and crevices, bait stations in high-activity areas, and sometimes a residual spray along baseboards and entry points. The baits work because cockroaches carry the poison back to their colony, spreading it to others that never touched the bait directly.
Bed bugs are one of the trickiest pests to eliminate. Aerosol “bug bombs” are largely ineffective because they only reach insects out in the open, not those hiding behind baseboards, inside mattress seams, or within walls. Professional treatments typically involve either targeted chemical applications to hiding spots or whole-room heat treatments that raise the temperature high enough to kill all life stages. Interceptor traps placed under bed frame legs can also help by trapping bugs trying to climb up to reach you at night.
Termite treatment usually involves either liquid termiticides applied to the soil around your foundation (creating a chemical barrier) or bait stations installed in the ground around your property. The bait approach works slowly but effectively: termites feed on the bait, carry it back to the colony, and gradually eliminate the population. Because termite damage is structural and often hidden, yearly inspections are standard even after treatment.
Rodent control relies heavily on exclusion, meaning the technician seals entry points with steel wool, metal flashing, or expanding foam before setting traps or bait stations. Killing mice without closing their entry routes just creates space for new ones to move in.
Modern Pest Management vs. Old-School Extermination
Traditional extermination was straightforward: show up, spray chemicals broadly, and leave. Modern pest management follows a framework called Integrated Pest Management, or IPM, which takes a fundamentally different approach. Instead of simply eliminating the pests you see right now, IPM looks at the environmental factors that allow pests to thrive and works to change those conditions.
That means pesticides are used only after monitoring shows they’re actually needed, and treatments target the specific pest rather than blanketing an area. A technician following IPM principles will choose the most selective product available, use bait stations instead of open sprays when possible, and spot-treat problem areas rather than coating entire rooms. The goal is long-term prevention through a combination of physical barriers, habitat modification (eliminating moisture sources, sealing food access), and targeted chemical use only when other methods aren’t enough.
In practice, this means your exterminator might spend as much time recommending that you fix a leaky pipe or trim branches touching your roof as they do applying any product.
What Happens After Treatment
Once a treatment is applied, there are a few things you need to do. Avoid cleaning treated areas for 24 to 48 hours so the products have time to work. Open windows and doors to ventilate your home for at least two to three hours, especially after interior sprays or foggers. If foggers were used, all people and pets need to be out of the house during treatment and until the space is fully aired out.
Cover or remove food from treated areas, and clean pet food bowls, water dishes, and toys before putting them back. Keep pets off treated surfaces until any sprayed products have dried completely, which is the minimum standard. Granular products applied outdoors may require keeping pets away for 24 hours or longer since the granules need to be watered in and dissolved before they’re safe.
After a few days, inspect for signs of continued activity. It’s normal to see some pests in the days immediately following treatment, as products like baits take time to spread through a colony. But if activity continues beyond a week or two, a follow-up treatment is usually warranted. Many companies include re-treatment guarantees in their service agreements for exactly this reason.
Ongoing Prevention Plans
For persistent problems or general peace of mind, many homeowners opt for recurring service plans rather than one-time visits. Monthly pest control typically runs $40 to $75 per visit and makes sense for properties with frequent activity that needs close monitoring. Quarterly plans cover seasonal prevention and are the most common option for general household pests. Annual plans, which include several scheduled visits spread across the year, typically cost $300 to $900.
Between visits, technicians generally recommend a few habits that make a real difference: seal trash bags and take garbage out regularly, clean up spills promptly, store dry goods in airtight containers, reduce clutter (especially in basements and garages where pests hide), and fix moisture problems like dripping faucets or poor drainage. These aren’t just generic advice. Pests need food, water, and shelter, and removing any one of those makes your home a less attractive target.
Licensing and What to Look For
Pest control is a regulated industry. Under federal law, every state is required to maintain a certification program for pesticide applicators. Commercial applicators, meaning anyone who applies pesticides on property other than their own, must pass certification exams to get licensed. These typically include a general “core” exam covering pesticide safety, laws, and application principles, plus category-specific exams depending on the type of pest control they’ll perform. Categories range from general household pest control to termite-specific work, fumigation, and public health pest control.
Technicians who work under the direct supervision of a licensed applicator may not need full certification themselves, but they still require a license to operate legally. This tiered system means the person in your home should always be either fully certified or working under someone who is.
When hiring an exterminator, ask for their license number, confirm it’s current with your state’s pesticide regulatory agency, and check whether they carry liability insurance. A legitimate company will provide this information without hesitation. You can also ask whether they follow IPM principles, which is a good indicator of a modern, thoughtful approach rather than a spray-first mentality.
Keeping Pets and Children Safe
The risk any pesticide poses to your pet or child depends on the product’s toxicity and how much exposure occurs. You can reduce that risk substantially with a few straightforward steps. Remove all pets from the home during interior treatments, or at minimum keep them in untreated rooms. If you have fish, cover the tank so vapors and dust can’t get in. Turn off central heating or air conditioning during treatment to prevent airborne pesticides from circulating through your ductwork.
After treatment, keep children and pets away from treated areas until sprayed surfaces are fully dry, and follow any longer timeframes specified by the technician. Make sure all bait stations are in secure locations that pets and small children can’t access. If your pet receives a topical flea or tick treatment at the same time, separate animals afterward so they don’t lick the product off each other, and keep children from petting treated animals until the product dries.