🏛️ IL STATE DIRECTORY 1 Active County Hubs

Illinois Commercial Permitting Directory

Access official municipal building fee calculators, contractor license bond prerequisites, and plan review turnaround times for all active Illinois county jurisdictions.

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Governing Building Code Standard

Illinois Accessibility Code & IBC 2021

Enforces 42-inch foundation frost-line depth requirements and IECC 2021 commercial energy standards.

State Regulatory Authority

Illinois Department of Financial & Professional Regulation (IDFPR)

Contractor license verification and mandatory state bonding thresholds enforced across all Illinois county building departments.

⏱️ Plan Check SLAs 3–14 business day initial plan review turnarounds across active county building divisions.

📜 Contractor Bonds Mandatory $10k–$50k surety bond filing required prior to commercial permit release.

📐 Submittal Standards Architectural stamps, COMcheck calculations, and structural load engineering packages.

💵 Valuation Fee Schedules Tiered valuation formulas per $1,000 construction cost plus local plan check surcharges.

Illinois County Workstations

Select a county building department to calculate municipal fees & bond rules

1 Verified

Cook County

Cook County Dept of Building and Zoning

Verified 2026

Plan Review SLA: 15 - 22 Business Days

Mandatory Surety Bond: $20,000

COI Coverage Minimum: $1.0M

Launch Cook County Workstation →

Submittal Checklist Illinois Plan Submittal Package

Standard Document Requirements for Illinois Permits

Before submitting building plans to any county AHJ in Illinois, ensure your project package includes the following required documentation:

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Stamped Architectural & Structural Plans Signed and sealed by a licensed Illinois architect or professional engineer (PE).

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Energy Compliance Documentation COMcheck or REScheck energy compliance calculations for building envelope & mechanical HVAC.

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Contractor License & Active Surety Bond Verified license status with Illinois Department of Financial & Professional Regulation (IDFPR) and active $10k–$50k bond certificate.

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Site Plan & Zoning Verification Property line setbacks, parking calculations, and stormwater management compliance.

Regulatory Reference

Illinois Building Permitting & Code FAQs

Q1: What model building codes are enforced in Illinois in 2026?

Illinois enforces the Illinois Accessibility Code & IBC 2021. Local municipal building departments (AHJs) adopt state amendments and local fee schedules.

Q2: Are contractor license surety bonds required in Illinois?

Yes. Most Illinois municipalities require commercial contractors to maintain an active license bond ($10,000–$50,000) and general liability insurance prior to permit issuance.