Pest Control in Chicago, Illinois

Yes. We connect Chicago homeowners and businesses in Cook County with licensed, state-certified pest management professionals. Our network covers all of Illinois and is available for pest inspections, treatments, exclusion, and recurring management programs in Chicago and surrounding communities. Call (844) 920-3454 to speak with a Illinois-licensed pest control professional.

The optimal window for rodent exclusion in Chicago is August through October — before temperatures drop and rodents begin actively seeking entry into heated structures. Mice can enter through gaps as small as a dime; rats through a quarter-sized opening. Once rodents establish inside a structure, both population removal and structural exclusion are required. Exclusion before the search begins is significantly simpler and less expensive than addressing an established infestation after winter entry.

No. Bed bugs infest any location near a human sleeping or resting area. They are commonly found in the seams and frames of upholstered furniture, behind headboards, in electrical outlet covers, behind wall art, in baseboards, inside nightstands, and in carpet tack strips adjacent to sleeping areas. In heavily infested properties, they may spread to multiple rooms and less obvious harborage sites throughout the structure.

Bed bugs are photophobic and retreat to harborage sites after feeding. Primary harborage includes mattress seams, box spring interiors, behind headboards, in the joints of bed frames, and in the folds of upholstered furniture. Secondary harborage extends to electrical outlets, behind switch plates, under carpet edges, in baseboards, behind hanging pictures, and inside books and clutter near the sleeping area.

Yes. Adult bed bugs are visible to the naked eye — approximately the size and shape of an apple seed. Nymphs in early instars are smaller and paler but also visible. Eggs are small and require close inspection. Despite being visible, bed bugs are rarely seen because they are nocturnal, avoid light, and retreat to deep harborage during the day. A professional inspection uses specialized techniques to locate hidden infestations.

Bed bug bites typically appear as small, red, raised welts that itch, often arranged in a linear or clustered pattern because multiple bugs feed from the same area. However, roughly 30 percent of people have no visible reaction to bed bug bites, and reactions in others can range from small marks to large welts. Bites alone are not a reliable confirmation of infestation — physical evidence of the bug itself is required for positive identification.

Bed bug bites do not transmit disease. The primary health concerns are secondary skin infection from scratching, allergic reactions in sensitive individuals, and the psychological and sleep disruption impacts of living with an active infestation. Severe allergic reactions to bed bug bites are rare but documented. The public health impact of bed bugs is primarily quality-of-life rather than direct disease transmission.

Female bed bugs lay 1 to 7 eggs per day following a blood meal. Eggs hatch in 6 to 10 days, and nymphs pass through five instars — each requiring a blood meal — before reaching adulthood in approximately 5 weeks under warm conditions. An adult female can produce 200 to 500 eggs in her lifetime. Populations can double every 16 days under optimal temperature conditions, making early treatment important.

Over-the-counter bed bug products rarely achieve elimination and often make professional treatment more difficult by dispersing bugs into deeper harborage. Effective bed bug control requires comprehensive heat treatment or a professional combination of contact, residual, and dust applications covering all harborage sites simultaneously. DIY attempts frequently reduce visible activity without eliminating the population, extending the infestation and the cost of eventual professional treatment.

Whole-room heat treatment is the most comprehensive single-method bed bug treatment, killing all life stages including eggs through exposure to temperatures above 120°F for sufficient time. Chemical treatment programs combining a contact knockdown, a residual product, and a dust in harborage voids are effective when applied comprehensively. Cryonite (CO2 freezing) is an alternative for sensitive environments. The most effective programs often combine heat for the room with targeted chemical treatment for harborage sites.

Bed bug heat treatment involves raising the temperature of the entire treated space — and all contents — above 120°F for a sustained period, typically 90 minutes at target temperature throughout the space. Professional electric or propane heating equipment raises ambient temperature while technicians use fans to ensure heat penetration into furniture, mattresses, wall voids, and floor items. All life stages including eggs are killed in a single treatment when executed correctly.

A professional bed bug heat treatment for an average residential unit takes 6 to 8 hours from setup to cool-down. Larger units, heavily cluttered spaces, or units with extensive contents that require repositioning during treatment take longer to ensure heat penetrates all areas uniformly. The treatment day requires full evacuation of occupants and pets while heat is applied.

Chemical bed bug treatment uses a combination of fast-acting contact sprays to kill immediately visible bugs, residual pyrethroid applications to surfaces in the harborage zone, and desiccant dusts applied to wall voids, outlet boxes, and deep harborage cracks. Chemical programs typically require 2 to 3 treatment visits over 2 to 4 weeks to address newly hatched nymphs that emerge after the initial treatment.

Preparation requirements vary by treatment type. For heat treatment, remove heat-sensitive items such as aerosols, candles, medications, and plants. For chemical treatment, launder and bag all bedding and clothing before service; move furniture away from walls; and clear clutter from under beds and in closets to allow full access to harborage sites. Your pest management professional will provide a preparation checklist specific to the treatment method planned.