How long does a home addition permit take in Chicago?
In Chicago, the typical home addition permit took about 3 months (103 days) from application to issue, across 960 permits issued from September 2024 to September 2026.
The two steps
The numbers behind the chart
| Step | Median | Middle half | Permits | Permits issued |
|---|---|---|---|---|
| Application to permit issued | about 3 months | 56 days to about 6 months | 960 | September 2024 to September 2026 |
Home addition contractors with the most jobs in Chicago
| Rank | Contractor | Jobs | Contact |
|---|---|---|---|
| 1 | Father and Sons Home Improvement II Inc | Get a quote | |
| 2 | Airoom, LLC | Get a quote | |
| 3 | Leonard & Son Construction Company, Inc | Get a quote |
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Permit wait by year issued
| Year issued | Jobs | Median | Middle half |
|---|---|---|---|
| 2024 | 113 | 82 days | 48 days to about 5 months |
| 2025 | 475 | about 3 months | 56 days to about 6 months |
| 2026 | 372 | about 4 months | 58 days to about 6 months |
Why it takes this long
- 0% of permits were issued the day they were applied for, and 8% within 30 days (960 permits).
- The time to final inspection is not shown: the city's permit data has no final inspection date.
Days are counted between the dates on each city permit: application_start_date, issue_date. Median and middle half: half of the jobs took longer than the median; the middle half runs from the 25th to the 75th percentile. A figure is shown only when it rests on 30 or more permits. Kinds of work are sorted by the same rules as our contractor lists. Source: Chicago Building Permits (data.cityofchicago.org ydr8-5enu), read 2026-09-24. The same figures as data: addition.json.