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Illinois Mechanics Lien Law

Everything you need to know to protect your lien rights in Illinois

Critical Deadlines

90

days - Preliminary Notice

120

days - Lien Filing

720

days - Enforcement

📋Preliminary Notice

REQUIRED
Deadline
90 days from first furnishing
Form Name
Subcontractor Notice to Owner
Must be Served To
Owner, Lender
Delivery Method
Certified mail or personal delivery

Warning: Missing this deadline may result in losing ALL lien rights.

⚖️Lien Filing

Filing Deadline
120 days from completion
Where to File
Recorder of Deeds
Filing Fee
$40-60
Description
Within 4 months of completion

⏱️Enforcement

Deadline to Sue
720 days from filing lien
Description
Within 2 years of completion

Note: If you don't file a lawsuit within this period, your lien becomes unenforceable.

🏛️Public Projects (Bond Claims)

Preliminary Notice
Required within 90 days
Bond Claim Deadline
180 days from last_work
Governing Statute
30 ILCS 550/

Special Rules & Contractor Protections

Pay-if-Paid

⚠️ Enforceable

Anti-Indemnity

✓ Protected by 740 ILCS 35/

Retainage Cap

10%

Prompt Payment

15 days

License Required

Not required for liens

💡 Important Notes for Illinois

  • Subcontractor MUST give 90-day notice to preserve full lien rights
  • Without notice, lien limited to amount owner still owes GC
  • Prompt pay: contractor must pay sub within 15 days of receiving payment
  • Interest and attorney fees for violations

📚 Statute References

Lien Law:
770 ILCS 60/
Bond Law:
30 ILCS 550/
Prompt Pay:
815 ILCS 603/

Protect Your Rights in Illinois

SubShield automatically applies Illinois lien laws when analyzing your contracts. Get deadline tracking, compliance alerts, and personalized risk analysis.

This information is for educational purposes only and is current as of January 2026. Always consult with a licensed Illinois construction attorney for your specific situation.