Chicago Additional Dwelling Unit Preapproval Applications, Historical

Chicago applications for preapprovals for Additional Dwelling Units (ADUs) received by the Department of Housing pursuant to a December 2020 ordinance. The dataset is historical-only and has been retired, with a new version anticipated. It was published by data.cityofchicago.org.

Use Cases

• Analyzing spatial distribution of ADU applications using LATITUDE, LONGITUDE, and WARD columns.
• Tracking application status trends over time using STATUS and SUBMISSION_DATE columns.
• Profiling property and applicant characteristics using OWNER_NAME, APPLICANT_NAME, YEAR_BUILT, and CURRENT_DUS columns.
• Mapping ADU eligibility and zoning compliance using ADU_ZONE, ZONING, and Census Tracts columns.

Strengths

• Includes 31 columns of detailed application, property, and geospatial data.
• Provides geospatial coordinates (LATITUDE, LONGITUDE) for mapping applications.
• Contains temporal fields (SUBMISSION_DATE, STATUS_UPDATED_DATE) for time-series analysis.

Limitations

• Dataset is marked as retired and historical-only; freshness should be verified.
• Row count and total data size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

data.cityofchicago.org

Collection Method

Applications received by the Department of Housing.

Time Range

Applications received pursuant to a December 2020 ordinance; specific date range is null.

Freshness

Last updated 2026-05-11 21:38:12; dataset is historical-only.

Geography

City of Chicago, Illinois, USA.