Evanston, Ill., City Code § 5 § 5-3-4-3

(A) The tenant shall not unreasonably withhold consent to the housing provider to enter the dwelling unit in order to: inspect the premises, make necessary or agreed repairs, decorations, alterations or improvements (including where such work elsewhere in the building requires such access),, supply necessary or agreed services, show the dwelling unit to prospective or actual purchasers, mortgagees, or workers, or show the dwelling unit to prospective tenants ninety (90) days or less prior to the expiration of the existing rental agreement.
(B) The housing provider may enter the dwelling unit without consent of the tenant in case of emergency.
(C) The housing provider shall not abuse the right of access or use it to harass the tenant. Except in cases of emergency, or unless it is impracticable to do so, the housing provider shall give the tenant at least two (2) days' notice of the housing provider's intent to enter and may enter only at reasonable times. An entry between 8:00 a.m. and 8:00 p.m. or at any other time expressly requested by the tenant shall be presumed reasonable. The housing provider shall provide this written notice directly to each dwelling unit by mail, telephone, or written notice or by other reasonable means designed in good faith to provide written notice to the tenant. If access is required because of repair work for common facilities or multiple apartments, a general written notice may be given by the housing provider to all potentially affected tenants that entry may be required. In cases where access is authorized due to an emergency the housing provider shall give the tenant written notice of entry within two (2) days after such entry.