Illinois Mold, Pests, Heat & AC Rules
Illinois rules on mold, pests, heat & ac for renters and landlords, with the statute or official page behind each answer. Last verified: 2026-10-22.
Short answer: No statute — Illinois has no statewide mold disclosure or remediation law for rentals. Mold falls under the landlord's general duty to keep the unit fit to live in, make necessary repairs, and comply with state and local health and housing codes. Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1; 765 ILCS 742/5
The rules in Illinois
| Mold | No statute — Illinois has no statewide mold disclosure or remediation law for rentals. Mold falls under the landlord's general duty to keep the unit fit to live in, make necessary repairs, and comply with state and local health and housing codes. For small repairs required by the lease or by law (lesser of $500 or half a month's rent), a tenant may use the statutory repair-and-deduct procedure after 14 days' written notice. The duty to keep a unit fit to live in comes mainly from Illinois court decisions (implied warranty of habitability) and local codes, not a single statute. Chicago and some other cities have their own ordinances. Repair-and-deduct is unavailable if the tenant, family, or guests caused the condition (765 ILCS 742/5). |
|---|---|
| Pests & bed bugs | No statute — Illinois has no statewide pest or bed-bug law for private rentals. Infestations are handled under the landlord's duty to keep the unit fit to live in and comply with local health and housing codes. Local ordinances (e.g., Chicago's) may impose bed-bug treatment and disclosure duties; check your city. |
| Heat | No statewide statute sets a heat requirement, minimum temperature, or heating season for private rentals. Heat is generally covered by the landlord's duty to keep the unit fit to live in and by local housing codes, which often set minimum temperatures (for example, in Chicago). If a landlord responsible for utilities fails to pay and service is threatened, tenants have separate rights under the Rental Property Utility Service Act (765 ILCS 735). |
| Air conditioning | No statute — Illinois does not require landlords to provide air conditioning or set a maximum indoor temperature for private rentals. If A/C is provided under the lease, repair duties follow the lease and local codes. |
| Smoke and CO detectors | Illinois has required smoke alarms in all dwellings since 1988. Since January 1, 2023, any newly installed battery-powered smoke alarm must have a sealed, 10-year non-removable battery; older alarms may stay until they are more than 10 years old or fail. Since January 1, 2007, homeowners, landlords and building owners must install carbon monoxide alarms within 15 feet of every sleeping room in homes that burn fossil fuel for cooking, heat or hot water, or that are attached to an enclosed garage. Carbon monoxide page: https://sfm.illinois.gov/about/divisions/fire-prevention-and-building-safety/carbon-monoxide-detectors.html. Section 3(e) text was read in the State Fire Marshal's fact sheet. |
Related questions
- Does a landlord have to fix mold?
- Who pays for pest control and bed bugs in a rental?
- Does a landlord have to provide heat?
- Does a landlord have to provide air conditioning?
Illinois vs. neighboring states
| State | Mold | Pests & bed bugs | Heat |
|---|---|---|---|
| Illinois | No statute — Illinois has no statewide mold disclosure or remediation law for rentals. Mold falls under the landlord's general duty to keep the unit fit to live in, make necessary repairs, and comply with state and local health and housing codes. For small repairs required by the lease or by law (lesser of $500 or half a month's rent), a tenant may use the statutory repair-and-deduct procedure after 14 days' written notice. Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1; 765 ILCS 742/5 | No statute — Illinois has no statewide pest or bed-bug law for private rentals. Infestations are handled under the landlord's duty to keep the unit fit to live in and comply with local health and housing codes. Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1 | No statewide statute sets a heat requirement, minimum temperature, or heating season for private rentals. Heat is generally covered by the landlord's duty to keep the unit fit to live in and by local housing codes, which often set minimum temperatures (for example, in Chicago). Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1 |
| Indiana | No statute — Indiana has no mold-specific landlord-tenant law. Mold is handled under the landlord's duties to deliver the premises in a safe, clean, and habitable condition and to comply with applicable health and housing codes. A tenant may sue to enforce these duties after giving notice and a reasonable time to repair. IC 32-31-8-5(1), (2); IC 32-31-8-6 | No statute — Indiana does not specifically assign pest or bed-bug treatment and has no bed-bug disclosure rule. Infestations fall under the landlord's safe, clean, and habitable delivery duty and health-code compliance, and the tenant's duties to keep the unit reasonably clean and comply with tenant obligations under health and housing codes. IC 32-31-8-5(1), (2); IC 32-31-7-5(1), (2) | Yes, if a heating system is provided at the time the lease is signed: the landlord must maintain it in good and safe working condition, and it must be sufficient to adequately supply heat at all times. No specific minimum temperature or heating season is set by state statute. Plumbing must supply a reasonable amount of hot and cold running water at all times. IC 32-31-8-5(4)(B), (D) |
| Iowa | No statute — Iowa has no mold-specific landlord-tenant law. Mold is handled under the landlord's duties to comply with building and housing codes materially affecting health and safety and to make all repairs and do whatever is necessary to keep the premises fit and habitable. Iowa Code § 562A.15(1)(a)(1), (2) | No statute — Iowa does not specifically assign pest or bed-bug treatment or require a bed-bug disclosure. Infestations fall under the landlord's fit-and-habitable and code-compliance duties; tenants must keep their unit clean and dispose of garbage and waste in a clean and safe manner. Iowa Code §§ 562A.15(1)(a)(1), (2), (5); 562A.17(2), (3) | Yes. The landlord must supply running water, reasonable amounts of hot water at all times, and reasonable heat — unless the building is not required by law to be so equipped or the heat/hot water is generated by equipment under the tenant's exclusive control with a direct utility connection. Heating facilities supplied by the landlord must be kept in good and safe working order. No numeric minimum temperature is set by state statute. Iowa Code § 562A.15(1)(a)(4), (6) |
| Kentucky | No statute — Kentucky has no mold-specific landlord-tenant law. Where the Uniform Residential Landlord and Tenant Act (URLTA) has been locally adopted, mold falls under the landlord's duties to comply with building and housing codes materially affecting health and safety and to do whatever is necessary to keep the premises fit and habitable. Outside URLTA areas, no statewide habitability statute applies; the lease and local codes govern. KRS 383.595(1)(a), (b); KRS 383.500 | No statute — Kentucky does not specifically assign pest or bed-bug treatment and has no bed-bug disclosure rule. In URLTA areas, infestations fall under the landlord's code-compliance and fit-and-habitable duties and the tenant's duty to keep the unit clean and dispose of garbage properly. Elsewhere, the lease and local codes govern. KRS 383.595(1)(a), (b); KRS 383.605(2), (3) | In URLTA areas, yes: the landlord must supply running water, reasonable amounts of hot water at all times, and reasonable heat between October 1 and May 1 — unless the building is not required by law to be so equipped or heat/hot water is produced by equipment under the tenant's exclusive control with a direct utility connection. Heating facilities the landlord supplies must be kept in good and safe working order. No numeric minimum temperature is set. Outside URLTA areas, there is no statewide heat statute. KRS 383.595(1)(d), (e) |
| Missouri | No statute — Missouri has no mold disclosure or remediation law. Missouri courts recognize an implied warranty of habitability as case law, not statute. Local housing codes set specific standards. If a condition that detrimentally affects habitability or sanitation violates a local housing or building code, an eligible tenant may use the statutory repair-and-deduct remedy. To qualify, the tenant must have lived there 6 consecutive months, be current on rent, and have no uncured lease-violation notices. RSMo 441.234; RSMo ch. 441 and 535 (checked) | No statute — no state law assigns pest or bed bug treatment or requires disclosure. The lease, local housing codes and the case-law implied warranty of habitability govern. Where an infestation violates a local housing code, an eligible tenant may use the repair-and-deduct remedy. RSMo ch. 441 and 535 (checked); RSMo 441.234 | No statewide minimum temperature or heating season for rentals. Heat requirements come from local housing codes and the lease. By statute, in master-metered multi-unit buildings, the utility must post notice 5 days before shutting off heat-related service for the owner's nonpayment. Tenants may then petition for a receiver, and service may not be cut while the petition is pending. RSMo 441.650; ch. 441 (checked) |
| Wisconsin | No statute — neither Wis. Stat. ch. 704 nor the rental-practices rule (ATCP 134) mentions mold. Mold is handled under the general repair duty (structural repairs, keeping equipment and landlord-controlled areas in repair, complying with any local housing code) and the pre-lease disclosure rule: before signing or taking a deposit, the landlord must disclose known uncorrected code violations that significantly threaten health or safety, and conditions that are a substantial hazard to the tenant's health or safety. A tenant may also use the untenantability remedies if the premises become unfit for occupancy. Wis. Stat. 704.07(2), (4); Wis. Admin. Code ATCP 134.04(2) | No bed-bug-specific statute. If the premises are damaged by an infestation of insects or other pests caused by the tenant's acts or inaction, the landlord may let the tenant remediate or may do the work itself and charge the tenant the reasonable cost (materials, labor, and the landlord's time at a reasonable hourly rate). Infestations not caused by the tenant fall under the landlord's general repair and local housing-code duties. Wis. Stat. 704.07(2), (3)(a) | Partly. The landlord must keep in reasonable repair any equipment it has expressly or impliedly agreed to provide to supply heat, and must comply with any local housing code. Before renting, the landlord must disclose if the heating facilities are not in safe operating condition or cannot maintain at least 67 degrees F (measured at the center of the room, midway between floor and ceiling) in all living areas during all seasons the unit may be occupied. Wis. Stat. 704.07(2)(a)2., 5.; Wis. Admin. Code ATCP 134.04(2)(b)2. |
City rules that may add to state law
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Compare mold, pests, heat & ac in all 50 states and DC →
Illinois Mold, Pests, Heat & AC Rules FAQ
Does a landlord have to fix mold in Illinois?
No statute — Illinois has no statewide mold disclosure or remediation law for rentals. Mold falls under the landlord's general duty to keep the unit fit to live in, make necessary repairs, and comply with state and local health and housing codes. For small repairs required by the lease or by law (lesser of $500 or half a month's rent), a tenant may use the statutory repair-and-deduct procedure after 14 days' written notice. (Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1; 765 ILCS 742/5)
Who pays for pest control and bed bugs in Illinois?
No statute — Illinois has no statewide pest or bed-bug law for private rentals. Infestations are handled under the landlord's duty to keep the unit fit to live in and comply with local health and housing codes. (Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1)
Does a landlord have to provide heat in Illinois?
No statewide statute sets a heat requirement, minimum temperature, or heating season for private rentals. Heat is generally covered by the landlord's duty to keep the unit fit to live in and by local housing codes, which often set minimum temperatures (for example, in Chicago). (Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1)
Does a landlord have to provide air conditioning in Illinois?
No statute — Illinois does not require landlords to provide air conditioning or set a maximum indoor temperature for private rentals. (Illinois Attorney General, Landlord and Tenant Rights and Laws, p. 1)
Who is responsible for smoke detectors in a rental in Illinois?
Illinois has required smoke alarms in all dwellings since 1988. Since January 1, 2023, any newly installed battery-powered smoke alarm must have a sealed, 10-year non-removable battery; older alarms may stay until they are more than 10 years old or fail. Since January 1, 2007, homeowners, landlords and building owners must install carbon monoxide alarms within 15 feet of every sleeping room in homes that burn fossil fuel for cooking, heat or hot water, or that are attached to an enclosed garage. (425 ILCS 60/3(e) (Smoke Detector Act); Office of the State Fire Marshal, Illinois Smoke Alarm Law and Carbon Monoxide Detectors pages)
General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.