Additional Dwelling Unit Preapproval Applications - Historical
Use escrito dataset chicago.xbwc-ntpx
This dataset has been <a href="https://data.cityofchicago.org/stories/s/pkyu-f77p" target=_blank">retired</a> and is historical-only. We have launched a <a href="https://data.cityofchicago.org/d/j4h8-ug9m" target=_blank">new dataset</a> with current data. -- 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. For a map of the eligible areas, please see https://data.cityofchicago.org/d/n8dk-kjjn. For more information about ADUs in Chicago, visit http://www.chicago.gov/ADU.
Cite as: City of Chicago. Additional Dwelling Unit Preapproval Applications - Historical. https://data.cityofchicago.org/d/xbwc-ntpx
- Publisher
- City of Chicago
- Tier
- Official
- Covers
- not stated
- Places
- Chicago
- Updated
- irregular
- Last modified
- 2026-04-02
- Units
- not stated
- License
- City of Chicago Data Portal Terms of Use
- Method
- https://www.chicago.gov
Columns
| Name | Type | Description |
|---|---|---|
| current_dus | number | Number of legally-established dwelling units on lot |
| prev_adus | checkbox | Whether there is a previous ADU application at the address |
| existing_bldg | checkbox | Whether the preapproval is for an existing building on the lot |
| latitude | number | The latitude of the property |
| aff_adus | number | Minimum number of affordable ADUs |
| new_adus | number | Proposed number of ADUs |
| max_adus | number | Maximum number of ADUs allowed |
| year_built | number | Year when the existing building on the lot (if any) was built |
| street_name | text | Street name portion of the property address |
| zoning | text | The zoning district of the property |
| street_number | number | Number portion of the property address |
| location | point | The location of the property in a format that allows for mapping and geographic analysis on this data portal. |
| status | text | Status of ADU preapplication |
| submission_date | calendar_date | Date when ADU preapplication was electronically submitted |
| longitude | number | The longitude of the property |
| id | number | A unique identifier for the record |
| street_direction | text | Direction portion of the property address |
| owner_name | text | Name of property owner (if different than applicant) |
| applicant_name | text | Name of ADU preapproval applicant |
| status_updated_date | calendar_date | Date when ADU preapplication status was last updated |
| comm_area | number | The Community Area of the property |
| adu_zone | text | The Additional Dwelling Unit-Allowed Area that the property is located in (See Section 17-7-0570 of the Zoning Ordinance) |
| address | text | Property address |
| ward | number | The Ward (City Council district) of the property |
| adu_type | text | The type of ADU |
| owner_occ | checkbox | Whether the property is owner occupied |