The short version
Trap the ones inside, then seal the gaps. An inspection usually costs $75–$250.
- Look for droppings, gnaw marks and night-time scratching.
- For Des Plaines homes, mice usually start moving indoors in September and October, as nights get colder.
- Traps remove them; sealing keeps them out.
- Never sweep or vacuum droppings dry.
Anyone in Des Plaines dealing with mice or rats, or hoping to keep them out.
What to look for
Rodents are mostly unseen. You hear them at night and find droppings by morning. A mouse fits through a gap the size of a dime. Seeing one in daylight usually means there are more.
- 1Gnaw marks on food packaging, wood trim, or wiring.
- 2Food scattered or hollowed-out fruit and nuts.
- 3Droppings in drawers, pantries, under sinks, or along walls.
- 4Chewed holes in the bottom of cabinets or drawers.
- 5Shredded paper, fabric, or insulation gathered into a nest.
- 6A musky or ammonia-like smell in closed rooms.
Why it’s worth acting soon
- Mice breed fast, every few weeks.
- Droppings and urine contaminate food and insulation.
- Gnawed wiring can be a fire risk.
- Nests and odor get harder to clean the longer they stay.
Treatment options and typical costs
Inspection and Entry-Point Mapping
$75–$250
Skipping this step is why so many homeowners buy traps twice. A proper Des Plaines inspection finds the gap you cannot see from the ground, usually up high or under the deck.
- Time
- 60–90 minutes
- Best for
- Every job; nothing else works without it
Tamper-Resistant Exterior Bait Stations
$100–$300 setup, $40–$80 per service visit
Locked bait stations around a Des Plaines home's perimeter reduce the outdoor rat population before it reaches the walls. Anchored and locked, they keep children, pets, and wildlife out.
- Time
- 30–45 minutes per visit, ongoing
- Best for
- Outdoor rat pressure; ongoing perimeter protection
Follow-Up Monitoring
$50–$150 per visit, or included in a plan
Monitoring traps left in quiet areas catch re-entry early. For Des Plaines homes, the first cold snap of fall is when a missed gap usually reveals itself.
- Time
- 20–40 minutes per visit
- Best for
- Confirming the house stays clear after treatment
Attic and Crawlspace Cleanup and Sanitation
$500–$3,000, higher if insulation is replaced
Soaked or matted insulation usually has to be replaced. That drives the top of the range in Des Plaines, so ask for a separate line item for insulation.
- Time
- Half day to two days
- Best for
- Heavy contamination; odor, urine-soaked insulation, nesting
Prices are typical published ranges. Ask what’s included before you compare quotes.
Clutter gives mice cover. Keeping stored fabric in lidded bins and off the floor takes away the nesting spots they like best.Which rodents live around Des Plaines.
Norway rats are the other usual suspect. They burrow along foundations and enter low. House mice are the most common rodent in Des Plaines homes. They're small, curious and breed quickly.
When they move in.
Spring is breeding season. Check for gaps before then. Small problems grow fast.
A metal vent cover with a working flap keeps mice out all winter. Plastic flaps crack in the cold and get chewed open.How they get into houses here.
Look at the dryer vent flap. Window wells need covers or screens. Homes from Des Plaines out to Arlington Heights and Skokie share the same weak spots, so the checklist below works across the area. Plenty of homes in Des Plaines have basements. Rodents use gaps around utility lines, dryer vents and window wells. Check where pipes and cables enter.
A year of rodents in Des Plaines.
- Spring: breeding season. Act on any sign quickly. - Winter: with lows near 17°F in Des Plaines, check the attic, garage and pantry for droppings. - Fall: mice move indoors as nights cool. Seal gaps in September. - Summer: with highs around 83°F in Des Plaines, rodents look for water. Fix drips and leaks.
Mice or rats?
- Behavior: mice are curious about new traps. Rats avoid them for days. - Sounds: mice sound light and quick. Rats sound heavier. - Holes: mice chew dime-sized holes. Rats chew holes closer to quarter-sized. - Droppings: mouse droppings are rice-sized. Rat droppings are two or three times bigger. - Rub marks: rats leave greasy smudges along walls and beams.
Sealing small gaps yourself.
- Expanding foam: fine on top of mesh, useless on its own. - Door sweeps: close the gap under garage and exterior doors. - Hardware cloth: use quarter-inch mesh over vents and larger holes. - Sealant or mortar: cover the mesh so it stays put. - Steel wool or copper mesh: pack it into small gaps first. - Check your work: daylight through a gap means it isn’t sealed.
Cleaning up droppings safely.
- Don’t sweep or vacuum droppings dry. It stirs up dust. - Wipe up with paper towels and bag them. - Spray droppings with a bleach solution, then wait five minutes. - Wear rubber or plastic gloves. - Air the room out for 30 minutes first. - Wash your gloved hands, then your hands.
What happens at an inspection.
They check the foundation, vents, rooflines and utility gaps. The inspector walks the outside first. Most inspections take about an hour. Photos help. You should come away with a list of entry points. Inside, they check the kitchen, garage and attic.
Rodents in the car.
Park in a closed garage when you can. Mice and rats nest in engine bays and chew wiring. Clear birdseed and pet food from the garage. Check the air filter box for nesting.
Bird feeders and rodents.
Use a seed tray and sweep up spills. Spilled seed feeds mice and rats. Store seed in a metal can with a tight lid. If rodents show up, bring feeders in at night.
Questions to ask before you sign.
- Is cleanup included, or extra? - What happens if they come back? - How many trap visits are included? - Which gaps will you seal, and with what? - Where are they getting in? - Will you use poison inside? (Ask them not to.)
Rodents by the numbers.
For Des Plaines homes, those three findings — species, entry points, and scale — are what a quote should be built on, not a regional average. For Des Plaines homes, ask any provider to show you the entry points and the plan before you compare numbers. National surveys set rough expectations but cannot diagnose one house. For Des Plaines homes, what actually matters is a walk-through: where the droppings are, how the rodents are getting in, and how large the colony is.
What affects the price
- Mice versus rats; rats take longer and cost more.
- Materials used for sealing: mesh, sheet metal, mortar.
- Sewer line inspection if rats are entering underground.
- Age of the home and condition of the foundation.
- Number of entry points found during inspection.
- Whether insulation must be removed and replaced.
📊
What's your biggest concern about rodents?
When to call for help
Call right away if you see rats. They take a longer, more careful approach. Attic cleanup is hard to do safely without training. Call if you hear them in the attic or walls. Droppings in several rooms are another sign. So is a dead-rodent smell.
What you can do yourself
That's where a pro's sealing work pays off. Rooflines, vents and attics are harder. Seal small gaps with steel wool and sealant. Store food in sealed bins. Bait them with peanut butter. Start tonight with snap traps along the walls.
Rodents in Des Plaines
A typical home in Des Plaines is worth around $285k, and chewed wiring or soiled insulation can get expensive. In Des Plaines's neighborhoods, woodpiles, fences, bird feeders and gardens draw rodents close to the house. Winter lows average around 17°F in Des Plaines, and that cold is what sends mice looking for a way in. With about 37 inches of rain a year, Des Plaines gives rodents plenty of water, so food and shelter are what you control.
Local research
Rodents in Des Plaines, IL: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Illinois, when they are busiest around Des Plaines, and what the state figures look like. Everything below links to the agency or university page it came from.
Leptospirosis cases (YTD 2026 vs 2025, week 13)
Chicago rat exposure.
CDC NNDSSRodent species recorded in Illinois
- House mouse (Mus musculus) — Enters at 1/4 inch; 5-10 litters per year; eats about 200 small meals a night.
- Norway rat (Rattus norvegicus) — Burrowing rat of basements, sewers and ground floors; tail shorter than head plus body.
When rodents are busiest around Des Plaines
Fall entry; winter infestations. Upper Midwest and Northeast: mice in walls and garages all winter.
Based on Des Plaines’s humid continental climate profile.
For context, nationally
- 1/4 inch (the width of a pencil) — Smallest gap a mouse can enter. CDC
- 890; 35% fatal; 94% west of the Mississippi — Hantavirus cases reported since 1993 (through 2023). CDC
Sources: CDC National Notifiable Diseases Surveillance System; CDC NNDSS; CDC; Pest Notes: House Mouse; Pest Notes: Rats. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep rodents away
- Declutter garages and attics to remove nesting cover.
- Seal every gap larger than a quarter inch with metal mesh.
- Inspect vehicle engine bays if parked near fields or woods.
- Store pantry staples in glass or hard plastic.
- Fit garage doors with tight bottom seals and corner guards.
- Walk the exterior each season looking for fresh gnawing.
A good rodent quote lists the inspection, the number of trapping visits, each opening to be sealed and the material for it, and any cleanup.Did you know?
A mouse's heart beats around 500 times a minute.
For Des Plaines homes, rodents make up about 40 percent of all mammal species on Earth.
Questions people ask
Are snap traps better than poison?
Bait belongs in locked stations outside. Poisoned rodents can die inside walls and smell for weeks. Traps let you confirm the catch and remove it. Indoors, usually yes.
What is rodent-proofing and why does it cost so much?
It's also the part that keeps them out. A mouse fits through a dime-sized gap, so it's slow work. It means sealing every gap with metal mesh and sealant.
How do I know if I have mice or rats?
Rats also chew larger holes and sound heavier at night. Mouse droppings are about the size of a rice grain. Check the droppings.
Do ultrasonic repellers work?
Sealing and trapping work better. It doesn't pass through walls either. Rodents get used to the sound within days. Not reliably.
What should be in a rodent control quote?
Cleanup should be listed separately. It should say what happens if they return. Entry points, sealing materials and the number of trap visits.
How common are rodent problems in U.S. homes?
Before work starts in Des Plaines, ask how many visits are included and what happens if the rodents come back. homeowners, 49% said they had ever dealt with rodents. In a Harris Poll conducted for the National Pest Management Association (NPMA) in September 2022, covering more than 1,300 U.S. Very common.
Are families with kids more likely to have rodents?
homeowners, 68% reported a rodent encounter at some point, well above the 49% of homeowners overall. Among parents of under-18s in the National Pest Management Association's (NPMA) September 2022 Harris Poll of more than 1,300 U.S. The survey evidence suggests they report them more often.
Are rodents a problem in Des Plaines?
They're common here, as almost everywhere. House mice cause most problems.
Nearby cities
Related guides
Sources (10)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Rodent Exterminator · Updated September 11, 2026 · How we write these guides