Free for homeowners
Pest control in Illinois
What are the most common pests in this state, and who handles them?
Pest control in Illinois splits between city and country: Norway rats work Chicago alleys and basements, bed bugs run through dense multi-unit housing, and downstate termites and harvest field mice pressure homes. Illinois homeowners can use PestChief free to reach one independent local pest control company matched to their ZIP code.
Where can you read about each pest?
Pest pressure here is shaped by climate, geography and housing stock, so it varies across the state. The notable issues for this state are set out on this page. For how each pest is identified, what the signs look like and what treatment usually involves, read the pest guides.
What is the climate like here?
Climate is the biggest single driver of which pests live here and how long their season runs.
Which pest issues stand out here?
- Norway rat pressure in Chicago alleys, basements and construction zones
- German cockroach and bed bug work in dense multi-unit housing
- Eastern subterranean termites in central and southern Illinois
- Field mice moving into homes after the fall harvest
Which pests are active in each season?
Activity shifts through the year, so the pest worth treating in March is rarely the one worth treating in August.
Which pests are active in spring?
Which pests are active in summer?
Which pests are active in fall?
Which pests are active in winter?
How does pest pressure vary by region?
Pest pressure is not uniform across a state. Elevation, humidity, soil and the age of the housing stock all change which pests appear and when.
Which regions of the state face which pests?
When do termites swarm in each region?
Is your ZIP code in Illinois covered?
PestChief is free to the homeowner. Coverage is checked ZIP code by ZIP code, not state by state. Give your ZIP code and the pest you are seeing, and if an independent local pest control company covers that ZIP code and handles that pest, your request goes to that one company, and it contacts you directly.
What licensing should you ask a company for?
Licensing is the one check a homeowner can make before any work starts. Every state requires a pest control company to hold a license, and most require a separate certification for specialty work such as termite treatment. Ask for the license number, confirm it covers the pest you have, and check it with the state agency that issues it.
What does this state require of a licensed company?
What else should you know about this state?
A few state specific details that change how pest control works here, and what they mean for a homeowner.
Which metro areas are covered?
Coverage varies inside a state, not only between states. A company that covers one metro area may not cover a rural ZIP code two counties away, and the pests it is licensed to treat can differ as well. The metro areas listed here are where PestChief most often has a company to introduce you to. If your city is not listed, a ZIP code check is still worth doing.
What do homeowners ask most?
What pests are most common in Illinois?
Illinois calls split urban and rural: ants, cockroaches, spiders, wasps and hornets, mosquitoes and rodents lead the list. Behind them:
- Norway rat pressure in Chicago alleys, basements and construction zones
- German cockroach and bed bug work in dense multi-unit housing
- Eastern subterranean termites in central and southern Illinois
- Field mice moving into homes after the fall harvest
When is pest season in Illinois?
Pest season in Illinois peaks twice: humid summer heat for mosquitoes and cockroaches, then the fall harvest that pushes rodents indoors.
Spring: Termite swarms downstate; ants and wasps become active. Summer: Mosquito and cockroach activity peaks in humid heat. Fall: Harvest and cooling temperatures drive strong rodent migration indoors. Winter: Indoor rodent, roach and bed bug work dominates.
Who licenses pest control companies in Illinois?
Structural pest control in Illinois is regulated by the Illinois Department of Public Health, which licenses structural pest control businesses and technicians. Confirm the Illinois license covers both the business and the technician doing the work.
How much does pest control cost in Illinois?
From Chicago rat work to downstate termite inspections, national estimates run about $171 (This Old House) for a single visit, $300 to $550 (HomeAdvisor) for a one time treatment program, and $300 to $900 (HomeGuide) a year on a recurring plan. They are published industry figures, not PestChief quotes, and the inspecting company quotes the real price.
Why are rats such a problem in Chicago?
Norway rats work Chicago's alleys, basements and construction zones, and dense multi-unit housing in the city adds German cockroach and bed bug pressure. Downstate Illinois faces a different mix: eastern subterranean termites in central and southern counties and field mice entering homes after the fall harvest.
Does PestChief cover Illinois?
Independent local companies cover ZIP codes in parts of Illinois; Chicago is the covered metro today. Chicago coverage does not imply downstate coverage, or the reverse, so check your ZIP code in the locations finder. A covered request goes to one company that handles the pest, and that company contacts the homeowner directly.
Where does this information come from?
Seasonality and pest biology
- US EPA, Integrated Pest Management principles
- UC Statewide IPM Program, Home and Landscape pests
- US EPA, Safe Pest Control
- Penn State Extension
Pricing
National estimates from published industry sources. Not PestChief quotes.
Licensing
Licensing is administered by Illinois Department of Public Health.
Ready to get this handled?
It costs the homeowner nothing. Coverage is checked ZIP code by ZIP code. Give your ZIP code and the pest you are seeing, and if an independent local pest control company covers that ZIP code and handles that pest, your request goes to that one company. It contacts you directly, and it sets its own price.
What should you check before you hire?
Every state we cover
Browse the full list of states and metro areas, and check whether your area is covered.
Pests, one by one
Identification, signs of an infestation and what to do first, for each pest we cover.
What pest control costs
National ranges by treatment type, with the basis for each figure stated plainly.
Season by season
Which pests get active when, and the months worth acting in before a problem grows.
Learn the basics
Plain explanations of treatments, prevention and the questions worth asking a company.
How PestChief works
We match a homeowner with one independent local pest control company. Here is what happens.