Bolingbrook, IL Rental Property Rules: Repairs & Habitability (2026)

3 to require every owner and operator who rents or leases dwelling units, rooming units, dormitories or guest rooms and who is obligated to furnish heat, to maintain a temperature of not less than 68 degrees Fahrenheit in all habitable rooms, bathrooms and toilet rooms from October 1 through May 31. Two exceptions apply: when the outdoor temperature falls below the winter design temperature for the area, the minimum is excused provided the heating system runs at full capacity, and where the average monthly outdoor temperature exceeds 30 degrees, a minimum of 65 degrees suffices.

4, extends a 65-degree minimum to occupied indoor work spaces during the same season. 7 sets a minimum bedroom size of 70 square feet for one occupant plus 50 square feet for each additional occupant. 5 further limits occupancy by living room and dining room square footage once a unit houses three or more people. These standards are enforced by the code enforcement department and checked during the compliance inspections required before a rental occupancy permit issues under article III of the same chapter.