Illinois Construction Compliance Requirements

Illinois Mechanics Lien Act requires subcontractors to serve notice on the owner within 90 days of completion. Liens must be recorded within 4 months of completion. Waivers follow statutory forms. Sworn statements required on payment applications.

Illinois Prevailing Wage Act requires prevailing wages on all public works projects over $50,000 (new construction) or $25,000 (maintenance). Certified payroll records required monthly. Illinois Department of Labor sets rates.

Workers compensation required for all employers. Minimum $1M general liability standard. Commercial auto liability required. Many projects require $5M umbrella. Waiver of subrogation endorsements commonly required.

Illinois follows federal OSHA standards for private sector. IDOL handles state-level enforcement and operates OSHA on-site consultation. Chicago has additional building code requirements.