Illinois Construction Document Management

Illinois Mechanics Lien Act: The 90-Day Subcontractor Notice

Securing payment rights in Illinois requires strict adherence to statutory deadlines. For subcontractors and suppliers not in direct contract with the owner, the Illinois Mechanics Lien Act (770 ILCS 60/) mandates a strict 90-day notice rule.

Under 770 ILCS 60/24, a subcontractor or party furnishing labor, materials, fixtures, apparatus, machinery, or services may at any time after making their contract with the contractor, and shall within 90 days after the completion thereof, cause a written notice of their claim and the amount due to be served upon the owner of record and the lender. The notice must state the exact location of the project and that the claimant is asserting a mechanics lien.

What the 90-Day Notice Must Include

Under 770 ILCS 60/24, the notice must contain specific information:

• The name and address of the claimant (the subcontractor or supplier)
• The name and address of the party with whom the claimant contracted
• A general description of the labor, materials, or services furnished
• The exact location of the project (legal description if available)
• The amount claimed and unpaid
• A statement that the claimant is asserting a mechanics lien
• The date or approximate date of completion of the claimant's work

Service Methods After January 1, 2025

Effective January 1, 2025, Illinois HB 4660 significantly simplified the service requirements for the 90-day notice. Under the updated 770 ILCS 60/24, subcontractors now have three delivery options:

1. Certified or registered mail with return receipt requested (delivery no longer restricted to addressee only)
2. A nationally recognized delivery company with tracking service (such as FedEx, UPS, or DHL)
3. Personal service (handing the notice to the owner or their agent)

Previously, the notice had to be delivered restricted to the addressee only, which created significant practical problems if the owner was unavailable or refused to sign. The 2025 changes eliminated this restriction, making it substantially easier for subcontractors to serve valid notice.

What Happens If You Miss the 90-Day Deadline

If you serve the 90-day notice late, Illinois courts have consistently held that the lien is void entirely. The principle of strict construction has been applied to the failure to timely serve the 90-day notice required by §24 of the Mechanics Lien Act. Unlike some states where a late notice merely shortens the lien period, Illinois courts have repeatedly invalidated mechanics liens for failure to strictly comply with the 90-day written notice period. There is no mechanism to revive a lien after this deadline passes.

Tracking the exact "last day of work" across multiple active projects is notoriously difficult for busy subcontractors. By utilizing MyCrewTracker's Daily Reports and Photo Management tools, field supervisors create a verifiable, date-stamped record of job site activities, ensuring back-office teams can accurately calculate lien deadlines and store certified mail delivery receipts securely via Quick Docs.

Illinois Lien Deadlines at a Glance

Missing a single deadline in Illinois can void your lien rights entirely. The table below summarizes the statutory deadlines every Illinois contractor, subcontractor, and material supplier must track.

How to File a Mechanics Lien in Illinois: Step by Step

The process below reflects the standard path for an Illinois subcontractor, supplier, or laborer seeking to preserve and enforce lien rights under the Illinois Mechanics Lien Act.

1. Log your first day of work. For owner-occupied single-family residential projects, the 60-day notice clock starts from your first day of furnishing labor or materials. MyCrewTracker's Daily Reports timestamp this automatically.
2. Prepare the 90-Day Notice. Under 770 ILCS 60/24, the notice must include the project location, the amount claimed, the names of the parties, a description of the work, and a statement that the claimant is asserting a mechanics lien.
3. Serve the 90-Day Notice. Send via certified mail, a nationally recognized delivery company with tracking, or personal service. The notice must be served within 90 days after completion of your work.
4. Track the completion date. Illinois's 4-month recording clock starts from completion of the work. The clock runs from the date on which the last service was furnished or materials supplied.
5. Prepare the verified Claim of Lien. Under 770 ILCS 60/7, the claim must include a sworn statement of the amount due, a description of the property, and the name of the owner.
6. Record the Claim of Lien with the County Recorder. Illinois mechanics liens are recorded at the county level, not the state. Record in the county where the property is located.
7. File suit within 2 years. Under 770 ILCS 60/9, you must commence an action to enforce the lien within 2 years after completion of the contract. There are no extensions.
8. Preserve all project documentation. Daily reports, delivery tickets, change orders, and photos become evidence in the foreclosure action.
9. Consider alternative remedies in parallel. Prompt Payment Act claims, contract claims, and payment bond claims can run alongside the lien.

Documents to Preserve for an Illinois Lien Claim

Illinois courts require proof that you furnished labor or materials and that they were incorporated into the property. The following records are what you need:

• Signed contract or purchase order with the prime contractor
• Certified mail receipts for the 90-Day Notice
• Delivery tickets signed by an authorized site representative
• Daily reports showing crew on site and work performed
• Photo evidence of installed work (timestamped and geotagged)
• Jobsite sign-in logs and crew attendance records
• Invoices, statements, and payment applications
• Email or text correspondence about scope and payment
• Change orders and extra work authorizations
• Written demand letters and any response

MyCrewTracker stores all of these in one project record. When a lien deadline approaches, the back office can generate the timeline needed to prepare the claim of lien without reconstructing months of field activity.

Illinois-Specific Gotchas

The 90-day notice is a strict prerequisite. Unlike some states where preliminary notice is only required for certain claimants, Illinois requires the 90-Day Notice for all subcontractors and suppliers not in direct contract with the owner. Missing it voids the lien entirely. Illinois courts have applied the principle of strict construction to this requirement.

Owner-occupied single-family residences have a shorter 60-day rule. Under 770 ILCS 60/24, subcontractors on existing owner-occupied single-family residences must notify the occupant within 60 days of first furnishing labor or materials. This is 30 days shorter than the standard commercial deadline.

The 2025 service changes are a significant win. Effective January 1, 2025, HB 4660 eliminated the "delivery restricted to addressee only" requirement for certified mail. Subcontractors can now use FedEx, UPS, or DHL with tracking, or personal service. This makes serving valid notice substantially easier.

The 4-month recording deadline is absolute. Under 770 ILCS 60/7, the verified claim of lien must be recorded within 4 months after completion of the work. There are no extensions.

The 2-year enforcement deadline is absolute. 770 ILCS 60/9 gives you exactly 2 years from completion of the contract to file suit. Set two calendar reminders: one at 18 months, one at 22 months.

Statutory lien waiver forms are mandatory. 770 ILCS 60/1 and related provisions prescribe statutory forms for waivers. Never sign an unconditional waiver before you have received and deposited the payment.

Construction defect statute of repose. Illinois's statute of repose for construction defects is 10 years from substantial completion under 735 ILCS 5/13-214. Retain project records for at least 10 years.

Illinois Prevailing Wage Act: 5-Year Certified Payroll Retention

For Illinois contractors working on public projects, the Illinois Prevailing Wage Act (820 ILCS 130/) enforces stringent documentation rules.

What the Prevailing Wage Act Requires

Under 820 ILCS 130/5, the contractor and each subcontractor on a public works project must:

• Make and keep records of all laborers, mechanics, and other workers employed by them on the project
• Records must include the worker's name, social security number, last known address, telephone number, email address, classification, and the hourly rate paid
• The records must include the gross and net wage, hourly overtime rate, fringe benefit rates, and the sponsor and administrator of fringe benefit plans
• File a certified payroll with the Illinois Department of Labor for the immediately preceding month, no later than the 15th day of each calendar month

Record Retention Requirements

Under 820 ILCS 130/5, the record retention requirements are as follows:

• For payments made before January 1, 2014: Records must be kept for 3 years from the date of the last payment on the contract or subcontract
• For payments made on or after January 1, 2014: Records must be kept for 5 years from the date of the last payment on the contract or subcontract

The statute mandates that these certified payroll records be retained for a minimum of five years from the date of the last payment on the public works contract or subcontract.

Certified Payroll Submission Portal

Pursuant to PA 100-1177 and 820 ILCS 130/5.1, the Illinois Department of Labor (IDOL) has developed and maintains an online portal for prevailing wage construction contractors to file their certified payrolls. The Certified Transcript of Payroll Portal can be accessed through the IDOL website, and contractors must create an Illinois Public ID Account to log in and submit payrolls.

Relying on physical filing cabinets or localized hard drives for long-term statutory retention exposes your business to catastrophic data loss from fire, theft, or hardware failure. MyCrewTracker offers a secure cloud repository where Illinois contractors can organize and safely archive five years' worth of certified payroll documents, ensuring audit readiness at all times.

Example Scenario: How Documentation Determines the Outcome

*The following is an illustrative scenario, not a specific case. It demonstrates how record-keeping affects outcomes in Illinois lien disputes.*

Consider a Naperville electrical subcontractor on a $600,000 commercial office renovation. The sub's last day of substantial work is August 15. Under 770 ILCS 60/24, the sub has 90 days from completion to serve the 90-Day Notice on the owner and lender. That deadline is November 13.

The sub prepares the notice on October 25, ensuring it includes the project location, the amount claimed ($85,000), the names of the parties, a description of the work, and a statement that the claimant is asserting a mechanics lien. The sub serves it via certified mail on November 1. The green card returns signed on November 5.

Under 770 ILCS 60/7, the sub has 4 months from August 15 to record the claim of lien. That deadline is December 15. The sub records the lien on December 5.

Under 770 ILCS 60/9, the sub has 2 years from completion to file suit. That deadline is August 15 two years later. The sub files suit on May 15 of the following year, well within the window. The lien is enforceable.

Compare that to the same sub who serves the 90-Day Notice on November 20 — seven days late. Under 770 ILCS 60/24, the lien is void entirely. Illinois courts have consistently applied strict construction to this requirement, and the sub loses all lien rights regardless of how much documentation they have. The $85,000 owed becomes significantly harder to collect.

Documentation is what separates these outcomes. MyCrewTracker logs the last day of work, the notice service date, the recording date, and the daily reports that prove performance.

How MyCrewTracker Supports Illinois Contractors

Beyond state-specific compliance, general industry practice in Illinois demands rigorous daily documentation to protect your profit margins. MyCrewTracker provides standard tools to help:

• Quick Docs — Upload, organize, and store project files, subcontracts, lien notices, and certified payroll records in one secure cloud environment.
• Daily Reports — Log weather, crew size, and site conditions directly from a mobile device, creating a reliable daily log of activities.
• RFI & Change Order Tracking — Keep a clear, accessible record of client approvals and RFIs to ensure you get paid for out-of-scope work.
• Photo Management — Capture and date-stamp progress photos to document work quality and site conditions.
• Certified Payroll Archive — Store five years of certified payroll records in a secure, audit-ready repository.

What MyCrewTracker Does (and Does Not Do) in Illinois

MyCrewTracker is a construction documentation platform, not a legal service. Here is what it does for Illinois contractors:

• Logs first day and last day of work per project so you can calculate the 90-day notice deadline and the 4-month recording window
• Stores certified mail receipts and 90-Day Notice documents in the project file
• Records delivery tickets with photo and signature capture
• Captures timestamped, GPS-tagged site photos that document installation
• Generates daily report PDFs that serve as contemporaneous records
• Archives certified payroll records for 5+ years to meet Prevailing Wage Act requirements
• Tracks completion dates to support lien enforcement and defect defense

It does not draft lien notices, record documents with the County Recorder, submit certified payrolls to the IDOL portal, or provide legal advice. Those steps require an Illinois construction attorney and direct interaction with the Illinois Department of Labor.