Additional Dwelling Unit Preapproval Applications
Applications for preapprovals for Additional Dwelling Units (ADUs) received by the Department of Housing pursuant to the December 2020 ADU Ordinance. After issuance of an ADU preapproval, the owner must obtain a building permit from the Department of Buildings before constructing an ADU.
Due to changes in the underlying data, the previous version of ADU Preapproval Applications Dataset is being retired. The historical dataset is still available for viewing but will no longer be updated.
For a map of the eligible areas, please see https://data.cityofchicago.org/Buildings/Additional-Dwelling-Unit-Areas-Map/n8dk-kjjn
For more information about ADUs in Chicago, visit http://www.chicago.gov/ADU.
Resources
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| contactPoint |
{ "fn": "Maria Fiorillo", "@type": "vcard:Contact", "hasEmail": "mailto:no-reply@data.cityofchicago.org" } |
| description | Applications for preapprovals for Additional Dwelling Units (ADUs) received by the Department of Housing pursuant to the December 2020 ADU Ordinance. After issuance of an ADU preapproval, the owner must obtain a building permit from the Department of Buildings before constructing an ADU. Due to changes in the underlying data, the previous version of <a href="https://data.cityofchicago.org/Buildings/Additional-Dwelling-Unit-Preapproval-Applications-/xbwc-ntpx/about_data" target="_blank" rel="noopener noreferrer">ADU Preapproval Applications Dataset</a> is being retired. The historical dataset is still available for viewing but will no longer be updated. For a map of the eligible areas, please see https://data.cityofchicago.org/Buildings/Additional-Dwelling-Unit-Areas-Map/n8dk-kjjn For more information about ADUs in Chicago, visit http://www.chicago.gov/ADU. |
| distribution |
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| identifier | https://data.cityofchicago.org/api/views/j4h8-ug9m |
| issued | 2026-09-03 |
| keyword |
[ "buildings", "historical", "housing", "permits" ] |
| landingPage | https://data.cityofchicago.org/d/j4h8-ug9m |
| modified | 2026-11-04 |
| publisher |
{ "name": "data.cityofchicago.org", "@type": "org:Organization" } |
| theme |
[ "Buildings" ] |
| title | Additional Dwelling Unit Preapproval Applications |
