ADU Permits: Chicago vs Des Plaines
How do adu permits rules compare between Chicago, IL and Des Plaines, IL?
Chicago, IL
Cook County
Chicago regulates ADUs through the Additional Dwelling Unit pilot program codified at Chicago Municipal Code Chapter 17-2 and Section 17-9-0118, adopted by ordinance in December 2020. The pilot operates in five designated zones citywide, with permits issued by the Department of Buildings.
View full Chicago rules →Des Plaines, IL
Cook County
No data available yet for Des Plaines.
Key Facts Comparison
| Fact | Chicago | Des Plaines |
|---|---|---|
| Code Section | MCC 17-9-0118 | - |
| Pilot Zones | Five designated zones | - |
| Review Agencies | DOB, DPD | - |
| Permit Type | Building permit, owner-builder OK | - |
| Daily Fine | $200 to $1,000 | - |
Highlighted rows indicate differences between cities.
Chicago FAQ
Where can I build an ADU in Chicago?
Only in the five pilot zones designated under MCC 17-9-0118 — the North, Northwest, West, South, and Southeast zones. Outside these areas, ADUs are not permitted by the Chicago Zoning Ordinance.
What review does a Chicago ADU need?
DOB issues the building permit, DPD reviews zoning compliance under MCC 17-2-0303-G, and licensed Chicago Master Plumber and Master Electrician must perform utility work.
Are coach houses allowed in Chicago?
Yes, within the pilot zones on RT, RM, or RS-3 zoned lots. Coach houses are detached rear-yard ADUs permitted under MCC 17-9-0118 and the ADU pilot program.
Des Plaines FAQ
No FAQs available.
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