Data · dataset · 2026
Additional Dwelling Unit Preapproval Applications
Listed in Chicago Data Portal
Applications for preapprovals for Additional Dwelling Units (ADUs) received by the Department of Housing pursuant to the December 2020 ADU Ordinance.
Description
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 data.cityofchicago.org/Buildings/Additional-Dwelling-Unit-Areas-Map/n8dk-kjjn For more information about ADUs in Chicago, visit chicago.gov/ADU.
Links
Get the data
- CSV data.cityofchicago.org/api/views/j4h8-ug9m/rows.csv?accessType=DOWNLOAD ↗
download · from data cityofchicago org
Where it is published
- Chicago Data Portal dataset page data.cityofchicago.org/Buildings/Additional-Dwelling-Unit-Preapproval-Applications/j4… ↗
landing page · from data cityofchicago org
Catalogue records · 1
- SODA API data.cityofchicago.org/resource/j4h8-ug9m.json ↗
metadata API · from data cityofchicago org
Topics
- Stated by source
- Buildings
- From keywords
- Humanities · Social Science
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Chicago Data Portal | j4h8-ug9m | 6 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| concepts[field].local:field:humanities | mapping · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| concepts[field].local:field:social-science | mapping · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| concepts[topic].socrata_category:data_cityofchicago_org:buildings | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| created_date | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| description | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | /resource/description |
| license_text | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| publication_date | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | |
| title | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 | /resource/name |
| updated_date | source · data cityofchicago org | connector:data_cityofchicago_org@1.0.0 |