Discover how Illinois is embracing ADUs to create more resilient and inclusive communities, and navigate the legal requirements for building ADUs.

May 3, 2025 · Explore the rise of Accessory Dwelling Units in Illinois as a solution to housing shortages and affordability challenges.

May 12, 2023 · Nearly a dozen communities in northeastern Illinois currently permit ADUs through their zoning ordinances or are considering amending their zoning ordinances to permit ADUs (see table …

In this blog we give you the clear answers on ADU Regulations in the state of Illinois.

In Illinois, there are different types of Accessory Dwelling Units (ADUs) that are allowed, each with its own specific regulations and requirements. These include:

Residents in existing pilot areas can still apply for an ADU. The pilot areas are identified in our dedicated ADU website. The Additional Dwelling Units (ADU) Ordinance, approved by the Chicago City Council …

They are commonly built within an existing home (such as a basement or an addition), above a garage or often as a freestanding small dwelling unit. While Champaign used to allow these types of units …

Feb 18, 2025 · Provides that a unit of local government may not prohibit the building or usage of accessory dwelling units in the unit of local government.

Amends the Control Over Building and Construction Article of the Illinois Municipal Code. Provides that a municipality may not prohibit the building or usage of accessory dwelling units in the municipality.

Sep 1, 2025 · Explore the differences between Single-Family Residences, Duplexes, and Accessory Dwelling Units (ADUs) in Illinois. Learn about zoning regulations, financing options, and critical …