Iowa: Mechanic's Lien Deadlines & Notice Requirements

The short answer

Iowa runs its whole lien system through a single, statewide online
database — the Mechanics' Notice and Lien Registry (MNLR), administered
by the Secretary of State — instead of county-by-county paper filing.
Post your lien statement within 90 days of your last labor or materials
and you get full, unqualified lien rights; miss that window and you can
still post up to 2 years and 90 days out, but your recovery gets capped
to whatever the owner still owed the general contractor when you finally
gave notice. Iowa has no notice-of-completion mechanism to shorten any
of this, and uniquely, the state itself — not the claimant — mails a
copy of the lien to the owner. Residential construction is where the
real risk lives: a general contractor must post a notice of commencement
within 10 days of starting, and every subcontractor or supplier must
post a preliminary notice before the owner finishes paying the general
contractor, or lose lien rights completely.

Requirements one by one

Governing law

Iowa's lien law is Iowa Code Title XIV, Chapter 572, "Mechanic's Lien"
(§§ 572.1-.34). Unlike California's or Utah's multi-part comprehensive
recasts, it is one continuous chapter with roots going back to the
1850s, modernized in 2013 by moving all filings onto the online
Mechanics' Notice and Lien Registry (MNLR), run by the Iowa Secretary of
State rather than a county recorder.

Who can claim

Section 572.2(1) gives a lien to "every person who furnishes any
material or labor for, or performs any labor upon, any building or land
for improvement, alteration, or repair thereof," naming construction,
grading, sodding, landscaping, sidewalk building, and fencing work done
under contract with "the owner, owner-builder, general contractor, or
subcontractor." Section 572.2(2) extends the same right to a person who
rents material or equipment to the job. "Subcontractor" is defined
broadly in § 572.1(11) to include "every person furnishing material or
performing labor upon any building, erection, or other improvement,
except those having contracts directly with the owner" — so any
non-privity supplier counts as a subcontractor for lien purposes, not
just trade subs.

Preliminary notice

Iowa splits this dimension sharply by project type. On residential
construction (single- or two-family dwellings), § 572.13A(1) requires
the general contractor or owner-builder to post a "notice of
commencement of work" to the MNLR "no later than ten days after the
commencement of work," and § 572.13B(1) separately requires every
subcontractor to post its own "preliminary notice," effective only if
posted "before the balance due is paid to the general contractor or the
owner-builder" — a payment-triggered deadline instead of a day count.
Both notices are do-or-die: § 572.13A(4) says a general contractor who
skips it "is not entitled to a lien," and § 572.13B(4) says the same for
a subcontractor. On commercial construction there's a narrower rule:
only a person furnishing labor or materials to a subcontractor (not a
direct subcontractor) has to notify the general contractor in writing,
and only within 30 days of first furnishing (§ 572.33(2)(a)).

Deadline to file the lien

Section 572.9 sets the baseline: the lien statement "shall be posted ...
within two years and ninety days after" last furnishing labor or
materials. In practice, Iowa treats the first 90 days as the safe,
unqualified window. Posting later is still possible under § 572.10 — "a
general contractor or a subcontractor may perfect a mechanic's lien ...
beyond ninety days ... by posting a lien to the [MNLR] and giving written
notice thereof to the owner" — but a late-posted lien loses its full
strength: § 572.11 limits it to "the extent of the balance due from the
owner to the general contractor ... at the time of the service of such
notice." In other words, if the owner has already paid the general
contractor off in full by the time you give notice, a late lien
recovers nothing.

Notice of completion effect

Iowa has no such mechanism. Nothing in Chapter 572 lets an owner record
a notice of completion or cessation to shorten any claimant's deadline;
every clock in this chapter runs strictly from the date labor or
materials were last furnished.

Serving the lien on the owner

Here Iowa flips the usual script: the claimant doesn't have to serve
anyone for a timely lien. Section 572.8(2) puts that job on the state:
"upon posting of the lien, the administrator shall mail a copy of the
lien to the owner." The only point where a claimant has to personally
serve notice is the late-filing track above 90 days, where § 572.10's
written notice to the owner is what starts the balance-due clock under
§ 572.11 — that's a substantive trigger, not a formality, so treat it as
mandatory if you're filing late.

Deadline to sue to foreclose

Section 572.27 gives "two years from the expiration of ninety days
after" last furnishing to bring "any action to enforce a mechanic's
lien" — in practice, about 2 years and 90 days from your last day on the
job, mirroring the outside filing deadline in § 572.9. An owner can cut
that short: § 572.28(1) lets an owner serve "written demand ... requiring
the claimant to commence action to enforce the lien," and if suit isn't
filed "within thirty days thereafter," "the lien and all benefits
derived therefrom shall be forfeited."

Homestead/residential extras

Residential construction (defined in § 572.1(10) as single- or
two-family dwellings) is where Iowa's chapter gets strict in a way
commercial work never sees. Beyond the notice-of-commencement and
preliminary-notice requirements above, § 572.13A(3) requires the state
to send the owner a specific boldface warning about lien rights when the
notice of commencement is posted. None of this applies to commercial
projects, which run only on the narrower § 572.33 notice for
lower-tier suppliers.

What trips people up

The 90-day mark isn't a hard deadline the way it is in most states — it's
the line between an unqualified lien and a capped one. A subcontractor
who waits past 90 days can still post a lien up to roughly two years
later, but if the owner has already paid the general contractor in full
by the time notice goes out, that late lien is worth nothing. On
residential jobs, the preliminary notice deadline isn't a day count at
all — it's tied to when the owner finishes paying the general contractor,
so a subcontractor who assumes they have a fixed number of days can lose
lien rights entirely without ever missing a calendar deadline.

Common questions

Do I have to mail my recorded lien to the owner myself?
No, for a timely lien. The MNLR administrator (the Secretary of State's
office) automatically mails the owner a copy once you post it under
§ 572.8(2). You only need to personally notify the owner if you're
posting after the 90-day window.

I'm a subcontractor on a residential job — when exactly is my
preliminary notice due?
There's no fixed day count. Section 572.13B requires posting it "before
the balance due is paid to the general contractor," so the safest
practice is to post as soon as you start work rather than waiting to see
how the payment schedule plays out.

What happens if I miss the 90-day filing window?
You can still post a lien up to two years and 90 days after your last
day on the job, but only by also giving the owner written notice, and
your recovery is capped to whatever the owner still owed the general
contractor when that notice went out (§§ 572.10-.11).

Statutes and sources

• Iowa Code § 572.2(1) (who has lien rights) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.1(11) (definition of "subcontractor") —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.9 (outside filing deadline) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.10 (perfecting a lien after 90 days) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.11 (balance-due cap on a late-posted lien) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.8(2) (administrator mails lien to owner) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.13A(1),(4) (residential notice of commencement) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.13B(1),(4) (residential subcontractor preliminary notice) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.33(2)(a) (commercial lower-tier notice) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.27 (deadline to sue to foreclose) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)
• Iowa Code § 572.28(1) (owner's demand for suit) —
  https://www.legis.iowa.gov/docs/code/2026/572.pdf
  (accessed 2026-07-04)