Cook County Dept of Building and Zoning
Official building department contact workstation for Cook County, Illinois. Phone lines, online plan submittal portals, and physical office address.
🏛️ Office Address & Contact
⏱️ SLA & Plan Review Specifications
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Navigating Submittals & Plan Check Reviews at Cook County Dept of Building and Zoning
The Cook County Dept of Building and Zoning serves as the primary municipal Authority Having Jurisdiction (AHJ) for structural, electrical, plumbing, and mechanical code compliance across Cook County, Illinois. The department oversees plan review intake, issues official building permits, and conducts mandatory field inspections for all residential and commercial construction under Cook County Building Code Ord 102-120.
To avoid submittal rejections or intake delays, contractors and architects submitting plans to Cook County Dept of Building and Zoning must ensure that all submittals comply with enforced code standards (42-inch foundation frost-line depth requirement.) and include all required PE/RA engineering stamps, site utilities details, and contractor license filings.
Cook County Dept of Building and Zoning utilizes electronic plan review (EPR) portals for digital submittal of vector PDF plan sets, structural engineering calculations, and COMcheck energy compliance reports. Ensure all sheets are unlocked and oriented correctly prior to uploading.
Field inspections must be scheduled at least 24 hours in advance by contacting the automated inspection hotline at (312) 603-0500 or through the online portal. Approved job-site plans and permit inspection cards must be physically posted on-site at all times.