ADUAllowed

Chicago, IL

Chicago ADU Permit Check.

Chicago now allows conversion units and coach-house ADUs more broadly across the city, but the project must receive ADU pre-certification and the required building permits before construction or occupancy.

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ADU eligibility screen

Chicago now allows conversion units and coach-house ADUs more broadly across the city, but the project must receive ADU pre-certification and the required building permits before construction or occupancy.

Chicago Additional Dwelling Unit Program High confidence
ADU eligibility screen

Chicago now allows conversion units and coach-house ADUs more broadly across the city, but the project must receive ADU pre-certification and the required building permits before construction or occupancy.

Zoning district, property type, existing unit count, owner and affordability rules, coach-house or conversion type, building code, utilities, fire safety, and landmark status can still control approval.

What this tells youComputed rule answer
How precise this isComputed rule answer
Official data checkedChicago Additional Dwelling Unit Program
Next stepCheck parcel rules and project scope before design, purchase, or contractor conversations.
City answerConversion units and coach-house ADUs are available more broadly after the 2025 ordinance expansion
Required pathADU pre-certification and applicable building permits
Still verifyZoning, property and unit facts, ADU type, code, utilities, fire safety, affordability, and landmarks
Confidence: HighComputed rule answerReviewed jurisdiction ruleReviewed July 2026
Chicago Additional Dwelling Unit ProgramOfficial source
additional dwelling unitsexact answerofficial rulereviewed threshold

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Common questions

What source does ADUAllowed use for Chicago, IL?

Chicago Additional Dwelling Unit Program. Official agency pages remain final.

Can I act on this ADUAllowed result without checking the agency?

No. Zoning district, property type, existing unit count, owner and affordability rules, coach-house or conversion type, building code, utilities, fire safety, and landmark status can still control approval. Use the official source link before making a legal, safety, construction, property, or financial decision.