Building Permits in Cook County, Illinois

Name: Building Permits in Cook County, Illinois
Creator: PermitStack
License: https://permit-stack.com/terms.html
Keywords: building permits, Cook County, Illinois, construction data, permit API

PermitStack indexes 653,074 building permits issued in Cook County, Illinois, with 81,000 issued in the last 12 months alone. Search by address, contractor, category, and date via our free REST API.

653,074

Total permits

81,000

Last 12 months

Last 30 days

-99%

vs same period prior year

Apr 30, 2026

Latest permit

Permits by category (last 12 months)

Most common permit types issued in the last year.

Roofing

11,346

Renovation

8,672

Electrical

7,192

Fence

6,040

Interior remodel

5,195

Plumbing

5,020

Solar

3,614

HVAC

3,028

Signage

1,358

Fire alarm

1,086

Most recent permits

The 10 most recent permits issued in Cook County, Illinois. Full dataset available via REST API.

Issued	Permit #	Address	Category	Description
2026-04-30	20261022035370001	—	Addition	ADDITION/REMODEL WOOD DECK.
2026-04-27	20261022033140001	—	Solar	Roof mount solar panel installation
2026-04-24	20262822035420004	—	Roofing	Reroof single family dwelling and skylight replacement
2026-04-24	20261622004810001	—	Fence	INSTALL 6 FENCE
2026-04-23	20262822029400056	—	Other	WINDOWS
2026-04-22	20262822035420003	—	Roofing	REROOF SFR
2026-04-22	20262822029400060	—	Other	CABLE POLE
2026-04-22	20262822035420001	—	Addition	3RD STORY DORMER ADDITION TO SFR
2026-04-21	20262822035420002	—	Other	STOOP, DRIVEWAY REPLACEMENT W/APRON
2026-04-20	20262122036260006	—	Other	REMOVAL REPLACEMENT OF 95,885 S.F.OF ASPHALT AND 2,728 S.F. OF CONCRETE IN EXISTI...

Access Cook County permit data via API

Query Cook County, Illinois permits with a single HTTP request. Returns JSON with address, category, status, dates, and full description.

# Search all Cook County permits issued this month
curl -H "X-API-Key: YOUR_KEY" \
  "https://api.permit-stack.com/v1/permits/search?city=Cook%20County&state=IL&issued_after=2026-04-01"

Other cities we cover

Related coverage in Illinois and nationwide.

FAQ

Where does PermitStack get Cook County permit data?

We ingest data directly from the official Cook County open data portal (Tyler Data & Insights (Socrata)) daily. This is the same source used by the city's own public dashboards, normalized into a consistent JSON schema across our U.S. jurisdictions.

How current is the Cook County data?

Our automated ingestion runs daily at 03:00 UTC. The latest permit in our database for Cook County, Illinois was issued on April 30, 2026. Permit backlogs on the city side may mean some permits take a few days to appear.

Can I access Cook County permits without an API key?

Yes — our free tier includes 1,000 requests per day, enough to search and filter Cook County permits interactively. Sign up for a free API key to get started.