State Information | Iowa | National Lien Services

This is an overview of the state's statutory approach to lien law and what contractors might want to focus on to ensure lien rights are established timely, correctly, and effectively.

While we are happy to provide this guide as a quick reference, we HIGHLY encourage that you work with a construction attorney to help you with your particular circumstances in our complex construction lien law environment.

Iowa Quick Overview

Pursuant code	IA Code §§ 572.1 et seq.
State portal	https://sos.iowa.gov/mnlr/info/SCinfo.aspx
Prelien required for private / commercial projects	Yes
Prelien required for public projects	Yes
IA statutory relief	Full price
Lien milestone event	Last furnishing / last invoice
Lien enforcement deadline	1 to 3 years
Waivable lien rights	No specific statutes
Supplier to supplier rights	Likely yes
Prelien document name(s)	—
Prelien minimum information	Names and addresses of owner and claimant, general description of labor/materials, property legal description, date of commencement.
Prelien minimum notifications	Owner (residential), prime contractor (for sub-subs and suppliers on commercial projects)
Prelien recording requirement	No
Prelien notarized	No

Understanding the Prelien Process on Construction Projects in Iowa by Role

Iowa requires use of the MNLR portal for residential construction projects. Timely posting of a notice of commencement (by prime) and preliminary notice (by others) is essential. Commercial projects have fewer mandatory notice rules, except for suppliers and lower-tier claimants.

Prime / Original / General Contractors (GCs): Private/Commercial: On residential projects, the Prime Contractor must post a Notice of Commencement to the MNLR within 10 days of starting work. Failure to do so affects the lien rights of all parties.
Subcontractors / Trade Partners (Subs): Private/Commercial: On residential jobs, must post a Preliminary Notice to MNLR before final payment is made to the prime. Can post own Notice of Commencement if prime fails to post within 10 days.
Second-tier subcontractors: Private/Commercial: For commercial projects, must notify the prime contractor within 30 days of first furnishing materials or labor.
Lower-tier subcontractors: Private/Commercial: Same as second-tier: must notify prime contractor on commercial projects within 30 days.
Material suppliers: Private/Commercial: If supplying to subcontractor on a commercial job, must notify the prime contractor within 30 days of first furnishing.
Equipment lessors: Private/Commercial: Follows rules for material suppliers.
Second-tier material suppliers: Private/Commercial: If supplying below a sub-subcontractor, notice to prime within 30 days is required for commercial jobs.

Possible Exceptions, Special Circumstances, and Caveats in Iowa

Owner Occupied Residential: For owner-occupied dwellings, special deadlines and documentation rules apply.

Residential: Notices must be posted in the MNLR to preserve lien rights.

Mechanic's Liens in Iowa

In Iowa, a mechanics lien must generally be filed within 90 days from the last date materials were furnished or labor was performed. While a lien can be filed after that window, it will only attach to funds unpaid by the owner at the time of filing. For owner-occupied residential dwellings, special rules apply. A lien enforcement action must be initiated within 2 years from the expiration of the 90-day period or within 30 days after a written demand from the owner to file suit. Liens are managed through the Iowa Mechanic's Notice and Lien Registry (MNLR).

Bond Claims in Iowa

On public projects, mechanic's lien rights are typically replaced by bond claim rights. Bond claim notice and enforcement timelines can vary by project type and bond language, so coordinate with your construction attorney to confirm the correct deadline and required notice path.

Construction Lien Waivers in Iowa

Required format: Iowa does not require any specific statutorily required verbiage to be valid but be sure to check with your constuction attorney and consult any relevant state statutes.

Required notarization: Iowa does not require waivers to be notarized.

Iowa lien waivers are not standardized by statute and are typically governed by contract. Waivers should be explicit and properly executed, but there's no requirement that they be filed with a state or county agency.

Learn more about waivers here, including the when and how to use various types of waivers, the difference between a Lien Waiver and a Lien Release, what to look for before signing, and more.

As a client, you'll have free access to our system that easily creates statutorily correct lien waivers.
Through our technology partner Prelien Pro, you can also access best-in-class lien waiver management software, allowing you to easily track, collaborate, and share lien waivers with all your trade partners.

Assessors’ websites in Iowa counties

Most often, the county Assessor’s office is the go-to resource for online lien-related information for construction project parcels—ownership records, special warranty deeds, and more. Counties that we’ve not yet found online (those with “*”) link to a Google search for your convenience.

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Our Guide to Preliens, Waivers, Mechanic’s Liens, and Bond Claims in Iowa