Hawaii Construction Document Management

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

The process below reflects the standard path for an Iowa contractor, subcontractor, or material supplier seeking to preserve and enforce lien rights under Chapter 572 of the Iowa Code.

1. Log your first day of work. On residential projects, the 10-day Notice of Commencement clock (for general contractors) and the preliminary notice requirement (for subcontractors) start from your first day on the job site. MyCrewTracker's Daily Reports timestamp this automatically.

2. Post the Notice of Commencement to the MNLR (general contractors). Under Iowa Code § 572.13A, the notice must be posted within 10 days of commencement of work. Include the owner's name and address, the contractor's name and contact information, the property description, the date work commenced, and the tax parcel ID.

3. Post the Preliminary Notice to the MNLR (subcontractors). Under Iowa Code § 572.13B, all subcontractors must post a preliminary notice as soon as work or materials are first furnished. Failure to post this notice voids lien rights.

4. Track the completion date. Iowa's filing clock starts from the last date labor was performed or materials were furnished. The deadline is 90 days for principal contractors and 60 days for subcontractors.

5. Prepare the verified statement of account. The lien statement must include a description of the property, the amount due, and the dates of service.

6. File the mechanic's lien with the MNLR. Iowa mechanics liens must be posted to the MNLR, not the county clerk. The Secretary of State administers the registry.

7. File suit within 2 years and 90 days. Under Iowa Code § 572.27, you must commence an action to enforce the lien within 2 years from the expiration of the 90-day period for filing the claim. This means the total enforcement deadline is 2 years and 90 days from the last date of furnishing labor or materials.

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. Contract claims and payment bond claims can run alongside the lien.

Documents to Preserve for an Iowa Lien Claim

Iowa 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
• MNLR posting confirmations for Notice of Commencement and Preliminary 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 lien statement without reconstructing months of field activity.

Iowa-Specific Gotchas

The MNLR is mandatory, not optional. Unlike most states where lien filings happen at the county level, Iowa requires all mechanics' liens to be posted to the MNLR. The MNLR is administered by the Secretary of State and is searchable by the general public. If you file at the county level, your lien is invalid.

The 10-day notice of commencement is a strict deadline. General contractors on residential projects must post the notice of commencement within 10 days of starting work. A notice of commencement is effective only as to work performed after the posting. If you post late, you lose lien rights for the earlier work.

Subcontractors must post a preliminary notice. Under Iowa Code § 572.13B, all subcontractors — both higher- and lower-tiered — must file a preliminary notice on the MNLR. A subcontractor who fails to post a preliminary notice is not entitled to a lien.

The 60/90-day filing deadline differs by role. Principal contractors have 90 days from the last date of furnishing to file a lien. Subcontractors have only 60 days. There are no extensions.

The 2-year + 90-day enforcement deadline is absolute. Iowa Code § 572.27 gives you 2 years from the expiration of the 90-day filing period to file suit. This means the total deadline is 2 years and 90 days from the last date of furnishing labor or materials. Set calendar reminders at 18 months and 24 months.

Public works retainage was lowered to 3% in 2025. Under Iowa Code § 573.12, as amended by Senate File 574 (effective July 1, 2025), the retainage a public corporation can withhold from monthly payments was reduced from 5% to 3%. Contractors may also retain no more than 3% from subcontractor payments.

Construction defect statute of repose. Iowa's statute of repose for construction defects is 10 years for residential construction and 8 years for all other improvements to real property under Iowa Code § 614.1(11). If the unsafe or defective condition is discovered within one year prior to the expiration of the applicable period, the period is extended by one year.

Bad faith lien filings carry penalties. Under Iowa Code § 572.32, if the court determines that a mechanic's lien was filed in bad faith or the supporting affidavit was materially false, the court shall award the owner reasonable attorney fees plus an amount not less than $500 or the amount of the lien, whichever is less.

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 Iowa lien disputes.*

Consider a Des Moines roofing subcontractor on a $320,000 residential renovation of an owner-occupied single-family home. The sub first furnishes labor on March 1. Under Iowa Code § 572.13B, the sub must post a Preliminary Notice to the MNLR as soon as work or materials are first furnished. The sub posts it on March 5.

The general contractor posts the Notice of Commencement on March 3 — within the 10-day window required by § 572.13A.

The sub's last day of work is August 15. Under Iowa Code § 572.9, the sub has 60 days from August 15 to file the mechanic's lien. That deadline is October 14. The sub files the lien with the MNLR on October 5.

Under Iowa Code § 572.27, the sub has 2 years from the expiration of the 90-day filing period to file suit. The 90-day period ends on November 13. The sub has 2 years from November 13 to file suit. That deadline is November 13 two years later. The sub files suit on June 15 of the following year, well within the window. The lien is enforceable.

Compare that to the same sub who never posts a Preliminary Notice to the MNLR. Under § 572.13B, the sub is not entitled to a lien at all. The sub loses all lien rights, regardless of how much documentation they have. The $42,000 owed becomes significantly harder to collect.

Documentation is what separates these outcomes. MyCrewTracker logs the first day of work, the MNLR posting date, the completion date, and the daily reports that prove performance.

Iowa Public Works Retainage (Iowa Code § 573.12)

Under Iowa Code § 573.12, the public corporation shall retain from each monthly payment not more than 3% of the amount determined to be due according to the estimate of the architect or engineer. This is a reduction from the previous 5% rate, effective July 1, 2025.

The contractor may retain from each payment to a subcontractor not more than the lesser of 3% or the amount specified in the contract between the contractor and the subcontractor.

To enforce these rights, contractors must maintain perfect documentation of when invoices were transmitted and received. MyCrewTracker offers a secure cloud repository where Iowa contractors can organize dated payment applications and formal communications.

What MyCrewTracker Does (and Does Not Do) in Iowa

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

• Logs first day and last day of work per project so you can calculate the 10-day MNLR posting deadline and the 60/90-day filing window
• Stores MNLR posting confirmations and statutory 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 project records for 10+ years to support construction defect defense

It does not post notices to the MNLR, file mechanic's liens, or provide legal advice. Those steps require an Iowa construction attorney and direct interaction with the Secretary of State's MNLR portal.