AFFORDABLE COMMUNITIES ACT

Creates the Affordable Communities 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, 2026, for a zoning unit with a population equal to or greater than 100,000, regulations may not prevent the development of any middle housing types permitted in the zoning unit through unreasonable costs, delay, or procedural requirements. Allows zoning units to regulate middle housing to comply with protective measures adopted under statewide land use planning goals. Requires adoption of zoning ordinances and zoning maps consistent with the Act by June 1, 2026 for zoning units with a population equal to or greater than 100,000. 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 Affordable Communities Act. Effective immediately.