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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.

3 monthsfrom application to permitMiddle half: 56 days to 6 months

The two steps

How long home additions take in Chicago, in daysApplication to permit issued: median 103 days, middle half 56 to 172 days, 960 permits.Application to permit issued: about 3 months02 mo4 mo
Bars show the median; the line through each bar spans the middle half of jobs.
The numbers behind the chart
StepMedianMiddle halfPermitsPermits issued
Application to permit issuedabout 3 months56 days to about 6 months960September 2024 to September 2026

Home addition contractors with the most jobs in Chicago

RankContractorJobsContact
1Father and Sons Home Improvement II Inc
Riverside
65
Call (708) 447-7000
2Airoom, LLC
Plainfield
33
Visit website
3Leonard & Son Construction Company, Inc
Chicago
32
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See all 186 ranked home addition contractors

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We match contractors who work near it. We never ask for your street address.

2. What do you need?

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3. When do you want to start?
4. What is your rough budget?

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Sent. We have your request.

Over the next few days we email you up to 3 contractors who fit, and pass your request to them. Replies usually come within a few days.

Your job room keeps the request, your photos and every reply in one place, with an assistant that checks prices against city permits. Keep its link: it is the key to your job.

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Permit wait by year issued

Year issuedJobsMedianMiddle half
202411382 days48 days to about 5 months
2025475about 3 months56 days to about 6 months
2026372about 4 months58 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.