Mechanics liens

Iowa mechanics lien law and deadlines

Iowa mechanics liens are not filed at the courthouse. They are posted to the Secretary of State's online mechanics' notice and lien registry, ideally within 90 days after last furnishing, and enforced in district court within 2 years after that 90 day period ends.

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Iowa runs its mechanics lien system through a single statewide website. Under Iowa Code chapter 572, every lien, every residential notice of commencement, and every residential preliminary notice goes onto the mechanics' notice and lien registry kept by the Secretary of State. Post your lien within 90 days after your last labor or materials to keep full rights. You can still post later, up to 2 years and 90 days out, but the lien then reaches only what the owner still owes the GC. Enforcement suits are due within 2 years after the 90 day period runs out.

Iowa mechanics lien deadlines at a glance (private projects)
StepWhoDeadlineIowa Code
Owner notice in writing (residential)General contractor using subsNo day count in 572.13; GC has no lien without it572.13
Notice of commencement on registry (residential)GC or owner-builder using subsNo later than 10 days after work starts572.13A
Preliminary notice on registry (residential)Subcontractors and suppliersMust be posted to have a lien; protection limited to the unpaid balance when posted572.13B
One-time notice to GC (commercial)Anyone furnishing to a subcontractorWithin 30 days of first furnishing572.33
Post lien for full protectionGCs and subsWithin 90 days after last labor or materials572.9, 572.14
Late lien postingGCs and subsUp to 2 years and 90 days, limited to the balance owed at notice572.9 to 572.11
Enforcement suitLien claimantWithin 2 years after the 90 day period expires572.27
Suit after owner's written demandLien claimantWithin 30 days or the lien is forfeited572.28

Who has lien rights in Iowa

Section 572.2 covers every person who furnishes material or labor for, or performs labor on, a building or land improvement under a contract with the owner, owner-builder, general contractor, or subcontractor. The statute calls out grading, sodding, landscaping, nursery stock, sidewalks, and fencing, and it gives rental companies a lien for the reasonable rental value of equipment during actual use. Design professionals are not named in the section, so architects and engineers should confirm their position before relying on a lien. An owner-builder cannot lien for its own work before selling the property.

Residential work: three registry steps

Residential construction means single-family and two-family dwellings. On those jobs Iowa adds a chain of notices, and each one is a condition of lien rights.

  1. Owner notice from the GC (572.13). A GC who will use subs gives the owner a written notice in at least 10 point bold type explaining that unpaid subs and suppliers can lien even without a direct contract, along with the registry's web address and toll-free number. No notice, no lien for the GC.
  2. Notice of commencement (572.13A). The GC or owner-builder posts it to the registry no later than 10 days after work starts. It covers only work furnished after posting. If the GC does not post it, a sub can post it along with its own preliminary notice.
  3. Preliminary notice from subs (572.13B). Each sub or supplier posts a preliminary notice to the registry, and the state then mails the owner a warning. A lien is enforceable only up to what the owner still owed the GC when the notice was posted and when the owner actually received it. Post on day one, not after the GC stops paying.

Commercial work: the 30 day notice

On commercial jobs there is no registry preliminary notice, but second-tier parties have a different duty under 572.33. Anyone furnishing labor or materials to a subcontractor must send the general contractor or owner-builder a one-time written notice within 30 days of first furnishing, giving its name, mailing address, phone number, and the sub it is working for. The lien claim must then include a certified statement that the notice was sent.

Posting and enforcing the lien

Under 572.8 you perfect the lien by posting a verified statement of account to the registry showing first and last furnishing dates, the legal description, the owner's name and mailing address, the property address, and the tax parcel number. The Secretary of State mails the owner a copy. If you post within 90 days after last furnishing, the owner's payments to the GC during that period do not cut off your claim. After 90 days, you also have to give the owner written notice, and the lien is limited to the balance due from the owner when served. Section 572.27 requires an enforcement action within 2 years from the end of the 90 days, and 572.28 lets the owner serve a written demand that forces suit within 30 days.

Lien waivers in Iowa

Chapter 572 does not supply a statutory waiver form. Waivers still drive payment, though. The residential owner warning tells homeowners to collect lien waivers from the GC and from every party on the registry before paying, and on commercial jobs 572.33A lets the owner hold the GC's payment for 90 days after completion unless the GC delivers receipts and waivers from everyone who furnished work or a bond. Use a conditional lien waiver with each draw.

Public projects use bonds and retainage claims

Public improvements are handled under Iowa Code chapter 573, not the lien registry. Contracts of $25,000 or more must carry a bond with surety, and that payment bond plus retained funds secure subs and suppliers. Claims are filed with the public body's designated officer, generally before 30 days pass after completion and final acceptance, and actions to adjudicate the fund or the bond can be brought between 30 and 60 days after completion and final acceptance. Check the related Iowa pages for prevailing wage, prompt payment, and contractor registration.

Because registry protection depends on posting early, the notice should go out the same week you mobilize. Smart Business Automator can tie that task to job setup and track the 90 day posting date against open invoices in construction accounts receivable automation.

Frequently asked questions

Where do I file a mechanics lien in Iowa?

Online, on the mechanics' notice and lien registry run by the Iowa Secretary of State. Liens are not filed with the county recorder.

What is the Iowa mechanics lien deadline?

Post within 90 days after your last labor or materials for full protection. You can post up to 2 years and 90 days after last furnishing, but a late lien only reaches the balance the owner still owes the general contractor.

Does Iowa require a preliminary notice?

On residential construction, yes. Subs and suppliers must post a preliminary notice to the registry or they have no lien. On commercial jobs, parties furnishing to a subcontractor must give the GC a written notice within 30 days of first furnishing.

How long do I have to enforce an Iowa lien?

Within 2 years from the expiration of 90 days after last furnishing. If the owner serves a written demand, you have 30 days to sue or the lien is forfeited.

Can I lien a public project in Iowa?

No. Public improvements fall under Iowa Code chapter 573, which requires a bond on contracts of $25,000 or more and sets a claim process against retained funds and the bond.

Sources

  1. Iowa Legislature: Iowa Code 2026, Chapter 572, Mechanic's Lien (PDF)
  2. Iowa Legislature: Iowa Code 2026, Chapter 573, Labor and Material on Public Improvements (PDF)

Laws and rates change. Confirm current requirements with the state agency before you bid, file, or pay. This page is general information, not legal advice.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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