Iowa mechanic's lien law — the homeowner's view

What a mechanic's lien is

A mechanic's lien (also called a construction lien or materialmen's lien) is a legal claim against your real property by someone who supplied labor or materials to improve it and wasn't paid. In Iowa it's governed by Iowa Code Chapter 572. The lien becomes a cloud on your title — meaning you can't refinance or sell with clean title until it's released, paid, bonded around, or extinguished.

The system exists because contractors and suppliers extend credit (they do the work or deliver the lumber before they get paid). The lien is their security. Without it, anyone could stiff a roofer and the roofer's only recourse would be a lawsuit against a possibly judgment-proof contractor.

Who can file

• The general contractor you signed with directly.
• Subcontractors hired by your GC — even though you have no contract with them.
• Suppliers and material vendors — the lumber yard, the cabinet shop, the window manufacturer — even though you have no contract with them.
• Lower-tier subs hired by subs of your GC (with some limits).

The Iowa Mechanic's Notice and Lien Registry (MNLR)

Iowa created the MNLR (mnlr.iowa.gov) specifically to give residential homeowners a fighting chance against surprise sub liens. The system works like this:

1. Any contractor, sub, or supplier working on a residential project must post a preliminary notice to the MNLR to preserve their right to enforce a mechanic's lien against the homeowner.
2. The preliminary notice is publicly viewable by property address.
3. Homeowners can check the MNLR at any time to see exactly who has registered against their project.
4. If a sub or supplier fails to post a preliminary notice to the MNLR within the required time, they generally lose lien rights against the homeowner — even if they're owed money.
5. The homeowner is generally protected from paying twice for a sub that failed to follow the MNLR rules.

This is the most homeowner-protective lien regime among the states, and it's why understanding the MNLR is the single most important step a corridor homeowner can take on a remodel or build.

The timeline that matters

What you should do as a homeowner

Before signing a contract

• Confirm the GC is Iowa-registered with current bond and insurance.
• Ask the GC for a list of subs and suppliers they plan to use.
• Get a written contract specifying scope, schedule, and a payment schedule tied to milestones.
• Include a clause requiring the GC to deliver lien waivers from every sub and supplier as a condition of progress and final payments.

During the project

• Check the MNLR at mnlr.iowa.gov regularly — at least before each progress payment. Search by property address.
• If you see preliminary notices from subs you didn't know about, ask the GC and verify they're being paid.
• Don't pay the GC large lump sums upfront. Pay against completed work.
• For every progress payment, require conditional lien waivers from the GC and every notified sub/supplier (effective upon payment clearing).
• Keep copies of every check and every signed waiver.

At final payment

• Require unconditional final lien waivers from the GC and every sub and supplier on the MNLR.
• Get a final affidavit from the GC stating that all subs and suppliers have been paid in full.
• Check the MNLR one last time before releasing final payment.
• Keep all documentation for at least 5 years.

If a lien is filed against your property

1. Don't panic, but act quickly. Read the lien claim carefully — who filed, for what amount, for what work.
2. Verify MNLR compliance. Did the claimant post a preliminary notice to the MNLR within the required time? If not, their lien is generally unenforceable against a residential homeowner.
3. Contact the GC. If they're still around, demand they resolve it. The contract probably requires them to deliver clean title.
4. Hire an attorney. Iowa lien defense is highly statutory and fast-moving. Don't try to handle this with a Google search. See coralvillelaw.com.
5. Consider "demand action." Iowa allows a homeowner to formally demand the lien claimant file suit to enforce within 30 days — forcing the issue rather than letting the cloud linger for 2 years.
6. Bond around the lien if you need to close, sell, or refinance. You can post a surety bond that releases the lien from the property while the dispute is resolved.

Common residential corridor scenarios

Roof replacement after a hail claim

The roofer is the GC. The shingle supplier delivers materials. The disposal company hauls debris. The most common failed-payment scenario is the supplier (especially for storm-chaser roofers without strong supplier relationships). Always check the MNLR before releasing final payment, and require waivers from the supplier.

Kitchen remodel by a design-build firm

Multiple subs — cabinet maker, electrician, plumber, drywaller, flooring, painter. Each may post preliminary notices to the MNLR. Confirm and track waivers from every one before final payment.

Custom build by a corridor builder

Dozens of subs and suppliers over months. Use a structured progress-payment schedule with mandatory waivers at every milestone. Some buyers use a title company or attorney to handle disbursements with waiver tracking built in.

Window or siding installation

Usually one company doing both labor and supply. Lower lien risk, but still get a final waiver before paying the last installment.

FAQ