Will County, IL Rental Property Rules: Repairs & Habitability (2026)
Key Facts
- Minimum heat
- 68°F in habitable rooms
- Mandatory heat season
- Sept. 15 – April 30
- Applies to
- Unincorporated Will County only
- Max fine
- $500 per day, per § 150.999
Summary
In unincorporated Will County, landlords must heat rental units to 68°F from September 15 through April 30 under the county's amended Property Maintenance Code.
Every owner and operator of any building who rents, leases or lets one or more dwelling units, rooming units, dormitory or guest rooms on terms, either expressed or implied, shall furnish heat to the occupants and maintain a temperature of not less than 68°F (20°C) in all habitable rooms, bathrooms and toilet rooms from September 15th to April 30th IPMC Section 602.4 Occupiable Work Spaces To read: Indoor occupiable work spaces shall be supplied with heat during "habitable working hours" of not less than 65°F (18°C). (Ord. 14-103, passed 5-15-2014; Am. Ord. 18-115, passed 5-17-2018; Am. Ord. 18- 116, passed 5-17-2018; Am. Ord. 21-102, passed 8-19-2021; Am. Ord. 22-387, passed 1-19-2023) **** INTERNATIONAL RESIDENTIAL CODE 2018 ****
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2025 S-25: Supplement contains: Local legislation current through Ordinance No. 24-100, passed 4-18-2024 and Res. 23-387, passed 11-16-2023; and State legislation approved through 2024 Pamphlet #2).
Full Breakdown
Will County's amended International Property Maintenance Code, § 150.170, rewrites IPMC § 602.3 to require every owner or operator who rents, leases or lets a dwelling unit, rooming unit, dormitory or guest room to furnish heat and maintain at least 68°F in all habitable rooms, bathrooms and toilet rooms from September 15th to April 30th. The same section sets the year-round habitable-room temperature floor at 68°F under amended § 602.2. This only governs unincorporated county territory. Joliet, Bolingbrook, Romeoville, Plainfield and Lockport enforce their own municipal property maintenance codes.
Violations & Fines
Violation of the adopted IPMC provisions is a petty offense punishable by a fine of up to $500 under § 150.999, with each day of noncompliance a separate offense.
Frequently Asked Questions
Does this apply inside Joliet or Bolingbrook?
Can a landlord use a space heater instead of central heat?
Sources & Official References
Other rules in Will County
Compare Will County to another location·View the Illinois rental property rules overview
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