top of page
Construction site

⭐ How to File an Illinois Mechanics/Construction Lien (Step-By-Step)

Illinois Construction Lien

Follow these steps to file an Illinois mechanics lien and make sure you’re taking the right actions to protect your payment rights.

Step 1 — Send the Illinois 90-Day Notice (Subs Only)


Subs must notify the owner:

  • Within 90 days of last furnishing

  • Via certified mail or personal service

  • Must describe the work/materials and amount owed

GCs skip this step.

Step 2 — Prepare the Illinois Mechanics Lien Claim


Your Illinois lien must include:

  • Legal property description

  • Name of the property owner

  • Name/address of the claimant

  • Contract amount

  • Amount paid

  • Amount unpaid

  • First and last date of furnishing

  • Description of labor/materials

  • Verification (sworn statement)


Step 2 — Prepare the Illinois Mechanics Lien Claim


Your Illinois lien must include:

  • Legal property description

  • Name of the property owner

  • Name/address of the claimant

  • Contract amount

  • Amount paid

  • Amount unpaid

  • First and last date of furnishing

  • Description of labor/materials

  • Verification (sworn statement)


bottom of page