PlainPermit

Do I need a permit for an ADU or garage conversion in Chicago, IL?

Short answer: We could not confirm from an official source whether an ADU or garage conversion needs a permit in Chicago, IL; check with City of Chicago Department of Buildings before you start.

Last verified: · Confidence: low · Status: Unverified, confirm locally

Not legal advice. Always confirm with your local building department. Rules change, and your parcel's zoning, HOA, historic district, floodplain or utility work can change the answer. We show the official source and the date we last checked it so you can verify for yourself.
Unverified, confirm locally Confidence: low

Unverified: We did not find an official Chicago page on ADU or garage conversion permits that we could quote.

Note: Unverified, confirm locally.

Cost

Fee not extracted; see Chicago Department of Buildings fees. Unverified, confirm locally

Fee source: https://www.chicago.gov/city/en/sites/guide-to-building-permits/home/help/faq/DOB/EPP-eligible.html

Where to apply

City of Chicago Department of Buildings (Express Permit Program / online permits)

Permitting authority: City of Chicago Department of Buildings. Applies inside Chicago city limits. Landmark properties and districts may need Commission on Chicago Landmarks review. See also: how to apply for a building permit.

Official sources

Verified: · Status: unverified · Confidence: low

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Other projects in Chicago

ADU or garage conversion permits in other cities

Compare adu or garage conversion permit rules in all 25 cities · All Illinois cities