Creates the Single-Family Zoning Ban Act. Defines "zoning unit" as a county, municipality, or township that has adopted zoning regulations, and defines other terms. Provides that, on and after June 1, 2025, for a zoning unit with a population equal to or greater than 100,000 but less than 500,000, and on and after June 1, 2026, for a zoning unit with a population equal to or greater than 500,000, the zoning unit may not zone area exclusively for single-family residential use. Requires middle housing to be allowed on property that is zoned residential. Requires adoption of zoning ordinances and zoning maps consistent with the Act by June 1, 2025 for zoning units with a population equal to or greater than 100,000 but less than 500,000 or by June 1, 2026 for a zoning unit with a population equal to or greater than 500,000. Provides that the Illinois Housing Development Authority shall develop a model middle housing ordinance that must be used if a zoning unit fails to adopt the required ordinance or zoning map. Allows the Authority to grant exceptions to compliance under specified situations. Requires the Authority to adopt rules regarding the form and substance of a zoning unit's application for an extension, and allows the Authority to adopt other rules relating an extension. Limits the concurrent exercise of home rule powers. Amends the Illinois Administrative Procedure Act. Grants the Authority emergency rulemaking authority to implement the Single-Family Zoning Ban Act. Effective immediately.