What Is a Mechanics Lien in Iowa — Complete 2026 Guide
90-Day MNLR Filing Window Under Iowa Code § 572.9
Under Iowa Code § 572.9, every Iowa mechanics lien claimant — original contractor, subcontractor, sub-subcontractor, or material supplier — must post a verified statement of lien with the statewide Mechanics' Notice and Lien Registry (MNLR) within 90 days from the date the last item of labor, materials, or services was furnished to perfect the lien with full priority and to bind subsequent purchasers and encumbrancers without further notice. The 90-day window is uniform across all claimant tiers. A claimant who fails to post within the 90-day window is not entirely without remedy — but the post-90-day lien is significantly weaker. Under § 572.10, a claimant who posts after the 90-day window may still create a lien — but only against funds that remain in the owner's hands and only after first serving the owner with written notice of the lien filing. The post-90-day lien does not bind subsequent purchasers or encumbrancers and is limited to whatever amount the owner still owes the prime contractor at the time of the late filing. If the owner has already paid the prime in full, the late-filed lien attaches to nothing. Each claimant's clock runs from that claimant's own last date of substantive furnishing — not the project completion date and not the prime contractor's last day on site.
Statewide Mechanics' Notice and Lien Registry (MNLR) — Iowa's Unique System
Iowa is the only state in the country with a single statewide electronic mechanics lien registry — the Mechanics' Notice and Lien Registry (MNLR), administered by the Iowa Secretary of State under Iowa Code Chapter 572 Subchapter II. Iowa abolished county-by-county lien recording for mechanics liens effective 2013 and consolidated all filings into the MNLR. Pre-lien Notices of Commencement under § 572.13A, residential Preliminary Notices under § 572.13B, lien filings under § 572.9, lien amendments, and lien releases are all posted to the MNLR. The MNLR is searchable by project address, owner name, contractor name, and parcel identifier. Owners, lenders, title examiners, and contractors can verify lien status from any Iowa property from a single statewide database without traveling to individual county courthouses. The MNLR's statewide design eliminates the wrong-county filing trap. Out-of-state contractors who default to the County Recorder based on home-state practice frequently file invalid Iowa mechanics liens. The MNLR portal is accessible online and processes all postings electronically — paper filings with County Recorders are not valid mechanics lien filings in Iowa.
Residential Preliminary Notice Under Iowa Code § 572.13B
Under Iowa Code § 572.13B, every Iowa sub-tier claimant on an owner-occupied single or double family dwelling must post a written Preliminary Notice on the Mechanics' Notice and Lien Registry (MNLR) — and mail a copy to the homeowner — before the homeowner makes final payment to the prime contractor. The Preliminary Notice locks in the sub's lien rights against the homestead. A sub-tier claimant who fails to post the Preliminary Notice before the homeowner pays the prime in full has lost lien rights against the residential property to the extent of payments already made. The Preliminary Notice can be posted at any time before the homeowner pays the prime — the earlier the better. The notice must include the claimant's name and address, the contracting party who hired the claimant, the property owner's name, a description of the property, and a statement of the labor or materials being furnished. The Preliminary Notice rule applies only to owner-occupied residential single or double family dwellings; it does not apply to commercial projects, multifamily apartment buildings above two units, or to original contractors. Original contractors should consider posting a Notice of Commencement under § 572.13A to start the homeowner notice clock and protect priority.
2-Year Enforcement Deadline and 30-Day Demand to Commence Under §§ 572.27 and 572.28
Under Iowa Code § 572.27, an action to enforce an Iowa mechanics lien must be commenced in the Iowa District Court of the county where the property is located within 2 years from the date of the expiration of the 90-day filing period under § 572.9 — effectively 2 years and 90 days from last furnishing. Iowa's 2-year enforcement window is among the longest in the country. However, under Iowa Code § 572.28, the property owner can compel earlier enforcement by serving the lien claimant with a written demand to commence suit. Once the demand is served, the lien claimant has only 30 days to file the enforcement action in District Court or the lien becomes void. Lien holders who treat all enforcement under the 2-year window — and ignore § 572.28 demands — frequently lose lien rights to the 30-day demand response window. Calendar both the 2-year statutory deadline and the 30-day demand response deadline. Set reminders at 12 months, 18 months, and 21 months. Retain Iowa construction counsel within 1 week of receiving a § 572.28 demand. Once the 2-year window closes — or the 30-day demand window closes — the lien expires by operation of law.
Frequently Asked Questions
How long do I have to file a mechanics lien in Iowa?
Iowa's mechanics lien filing deadline under Iowa Code § 572.9 is 90 days from the date the last item of labor, materials, or services was furnished to perfect the lien with full priority. A claimant who posts after Day 90 may still create a lien under § 572.10 — but only against funds the owner still owes the prime contractor at the time of filing, and only after first serving the owner with written notice. The 90-day window applies uniformly to original contractors, subcontractors, sub-subcontractors, and material suppliers. All filings are made electronically with the statewide Mechanics' Notice and Lien Registry (MNLR).
Do subcontractors need a preliminary notice in Iowa?
On owner-occupied 1-2 family dwellings, Iowa sub-tier claimants must post a Preliminary Notice on the MNLR — and mail a copy to the homeowner — under § 572.13B before the homeowner makes final payment to the prime contractor. Failure to post the Preliminary Notice before the homeowner pays results in lost lien rights against the residential property to the extent of payments already made. The notice does not apply to commercial projects, multifamily above two units, or to original contractors. Post on Day 1 of furnishing on every Iowa residential project.
Where do I file a mechanics lien in Iowa?
File electronically with the statewide Mechanics' Notice and Lien Registry (MNLR), administered by the Iowa Secretary of State under Iowa Code Chapter 572 Subchapter II. Iowa is the only state in the country with a single statewide electronic mechanics lien registry — there is no county-by-county recording. The MNLR covers all 99 Iowa counties from a single portal. Paper filings with County Recorders are not valid Iowa mechanics liens.
How long do I have to enforce an Iowa mechanics lien?
Under § 572.27, an action to enforce the lien must be commenced in the Iowa District Court within 2 years from the expiration of the 90-day filing period — effectively 2 years and 90 days from last furnishing. However, under § 572.28, if the property owner serves a written demand to commence suit, the lien claimant has only 30 days to file the enforcement action or the lien becomes void. Calendar both the 2-year statutory deadline and the 30-day demand response deadline.
Who can file a mechanics lien in Iowa?
Under Iowa Code Chapter 572, every contractor, subcontractor, sub-subcontractor, material supplier, equipment lessor, laborer, architect, engineer, landscape architect, and surveyor who furnishes labor, services, materials, or equipment for the improvement of real property in Iowa has a mechanics lien — provided the 90-day MNLR filing deadline under § 572.9, the residential Preliminary Notice under § 572.13B (if applicable), and the 2-year-and-90-day enforcement deadline under § 572.27 are all satisfied.