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Iowa lien waiver requirements
Iowa does not prescribe a waiver form, but commercial owners cannot pay the GC for 90 days unless every sub has signed one.
Iowa Code Chapter 572 (Mechanic's Lien), with §572.27 governing waivers
The short version
Chapter 572 of the Iowa Code is the home of the state's mechanic's lien law. It does not require a specific waiver template. What it does require on commercial work is striking: an owner has no obligation to pay the general contractor until 90 days after completion unless the GC delivers signed waivers from every sub and supplier, or posts a bond. That clause turns waiver collection from a nice-to-have into a payment gate on commercial projects.
At a glance
- Iowa Code §572.27: 90-day commercial holdback unless waivers collected
- No specific statutory waiver form required
- No notarization requirement
- Mechanic's Notice and Lien Registry (MNLR) at sos.iowa.gov tracks residential lien notices
The 90-day commercial holdback rule
Section 572.27 lets a commercial owner sit on the GC's final payment for 90 days after project completion. The only way out is to hand over signed lien waivers from every person who furnished labor or materials, or post an indemnity bond.
For a GC, that turns waivers into a cash flow lever. Every signed waiver you bring to closeout shortens the time you wait for your money. Subs who refuse to sign cost you weeks of float.
Watch the overbroad waiver language
Iowa courts read waivers strictly. If your form says the sub waives all past, present, and future lien rights, that is what the sub gives up. Some subs sign without reading. Some sue later.
Limit each waiver to the specific payment and the specific through-date. Carve out retainage, pending change orders, and any claim not included in the current draw. A clean waiver is harder to challenge than a sweeping one.
Residential projects and the MNLR
On residential work, Iowa uses the Mechanic's Notice and Lien Registry, an online filing system run by the Secretary of State. Subs post notices there to preserve lien rights against owner-occupied homes.
Pull the MNLR for the property before you release the final draw. The waivers you collect should match the subs listed in the registry. Anything you missed is a lien risk you can still fix before payment.
Questions
Does Iowa require a specific lien waiver form?
No. Chapter 572 governs lien rights but does not mandate a waiver template. Waivers are treated as contracts.
What is the 90-day rule under §572.27?
On commercial work, the owner is not required to pay the GC for 90 days after completion unless lien waivers from every supplier and sub are produced, or a bond is posted.
Do Iowa lien waivers need to be notarized?
No. Iowa does not require notarization for a waiver to be valid.
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