⏱️ PLAN REVIEW SLA SPEED BENCHMARK
Illinois AHJs
Illinois Building Permit Processing SLAs
Empirical plan review turnaround performance directory ranking commercial and residential plan check speeds across all Illinois county building departments.
Illinois County Review Speed Rankings 2026 Verified
| County | Enforcing AHJ Department | Plan Review SLA | Action |
|---|---|---|---|
| Cook County | Cook County Dept of Building and Zoning | 15 - 22 Business Days | SLA Guide → |
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