Minnesota: Mechanic's Lien Deadlines & Notice Requirements

The short answer

Minnesota's mechanic's lien law, Minnesota Statutes Chapter 514, runs on a
single flat 120-day clock for every claimant instead of splitting deadlines
by tier the way many other states do. A prime contractor must warn the
owner up front, in the written contract or within 10 days if there is none;
a subcontractor or supplier must send its own 45-day notice. Whoever the
claimant is, the lien statement has to be both filed with the county and
served on the owner within the same 120 days after the claimant's own last
work or delivery, or the lien simply ceases to exist. From there, a
claimant has one year from the last item of work to sue to foreclose.
Minnesota has no owner-recorded notice of completion that can cut any of
these deadlines short, and it imposes no extra execution formality on
homestead property.

Requirements one by one

Governing law

Minnesota's private-improvement lien law is Minnesota Statutes Chapter 514,
"Liens Against Property," specifically §§ 514.01 through 514.135. It is an
older, single-chapter statutory scheme built up section by section over
more than a century, not a modern recast lien code or a uniform act.

Who can claim

Section 514.01 gives a lien to "whoever performs engineering or land
surveying services with respect to real estate, or contributes to the
improvement of real estate by performing labor, or furnishing skill,
material or machinery," whether that person contracted directly with the
owner "or at the instance of any agent, trustee, contractor or
subcontractor of such owner." That reaches contractors, subcontractors at
any tier, material and equipment suppliers, laborers, engineers, and land
surveyors. There is a licensing gate on top of that: § 326B.845, subd. 2
provides that "an unlicensed person who knowingly violates sections
326B.802 to 326B.885 has no right to claim a lien under section 514.01 and
the lien is void" — anyone who should be licensed as a residential building
contractor or remodeler under that separate licensing chapter loses lien
rights entirely by knowingly working without one.

Preliminary notice

Minnesota splits its pre-lien notice by tier, and both are conditions on
having a lien at all, not just formalities. A prime contractor's notice
must be written into the contract with the owner (with a copy given to the
owner), or, if there's no written contract, delivered separately "within
ten days after the work of improvement is agreed upon" (§ 514.011, subd.
1); missing it means the contractor "shall not have the lien and remedy
provided by this chapter" — total forfeiture. Anyone else who contributes
to the improvement without a direct contract with the owner — subcontractors
and suppliers — must instead serve their own notice "not later than 45 days
after the lien claimant has first furnished labor, skill or materials"
(§ 514.011, subd. 2). That second notice is more forgiving: a claimant
"does not lose the right to the lien for failure to strictly comply ...
if a good faith effort is made to comply, unless the owner or another lien
claimant proves damage as a direct result of the failure." Neither notice
is required at all for a wholly residential improvement of more than four
dwelling units (§ 514.011, subd. 4b), nor for a few narrower same-ownership
and large nonresidential-project exceptions in the same section.

Deadline to file the lien

Section 514.08, subd. 1 sets a single 120-day deadline that applies the
same way to every claimant tier: "the lien ceases at the end of 120 days
after doing the last of the work, or furnishing the last item of skill,
material, or machinery," unless a lien statement is filed within that
period. Unlike states that give the prime contractor and subcontractors
different day counts, Minnesota runs the same 120 days for everyone, each
measured from that claimant's own last contribution to the project.

Notice of completion effect

Minnesota has no mechanism at all here. Nothing in Chapter 514 lets an
owner record a notice of completion, substantial completion, or cessation
that shortens any claimant's 120-day filing deadline; the clock always runs
from the claimant's own last day of work or delivery, regardless of when
the overall project actually finished.

Serving the lien on the owner

Service isn't a separate step that happens after filing here — it's bundled
into the same 120-day deadline as the filing itself. Section 514.08, subd.
1 conditions the lien's continued existence on both steps happening within
the period: filing the statement for record, "and (2) a copy of the
statement is served personally or by certified mail on the owner or the
owner's authorized agent or the person who entered into the contract with
the contractor." Missing the service half is just as fatal as missing the
filing half — the statute doesn't distinguish a "technical" late service
from a fatal one.

Deadline to sue to foreclose

A claimant has one year to enforce the lien, measured from "the date of the
last item of the claim as set forth in the recorded lien statement," not
from the filing date itself (§ 514.12, subd. 3). The suit has to be started
by "filing a complaint or answer with the court administrator" within that
year, and anyone not made a party within the year isn't bound by whatever
judgment results.

Homestead/residential extras

Minnesota doesn't add any extra execution formality — no written-contract-
plus-spousal-signature rule, no notarization requirement — for homestead or
residential property inside Chapter 514 itself. The residential-specific
rule that does exist runs the opposite direction from what you might
expect: § 514.011, subd. 4b exempts wholly residential buildings of more
than four units from the pre-lien notice requirement altogether, rather
than adding protection for smaller residential jobs. Separately, § 514.02,
subd. 1(b) adds individual liability on top of the corporate form: on a
"residential real estate" project, "a shareholder, officer, director, or
agent of a corporation who is responsible" for diverting payments owed to
subcontractors "shall be guilty of theft of the proceeds," reaching past
the company to the individuals who took the money.

What trips people up

Because filing and service share the same 120-day deadline, a claimant who
mails the lien statement to the county on day 119 but hasn't yet gotten a
certified-mail copy to the owner can lose the lien even though the filing
itself was timely — both halves of § 514.08, subd. 1 have to land inside
the window. Subcontractors also sometimes assume they get the same
contract-based notice option a prime contractor has; they don't; their
45-day personal-delivery-or-certified-mail notice under § 514.011, subd. 2
runs on its own separate clock starting from their own first day on the
job, not from when the prime contractor's contract was signed.

Common questions

Do I get more time to file if I'm a subcontractor instead of the general
contractor?
No. Everyone files within the same 120 days after their own last work or
materials under § 514.08, subd. 1 — Minnesota doesn't split the filing
deadline by tier the way some states do.

I'm a subcontractor and missed the 45-day notice deadline by a few days —
is my lien automatically dead?
Not necessarily. Section 514.011, subd. 2(b) preserves the lien if you made
a good-faith effort to comply and the owner or another lien claimant can't
show actual damage from the delay, but a prime contractor's own notice
failure under subd. 1 has no such safety valve.

Can I get more time to file if the owner hasn't recorded anything showing
the project is finished?
No — Minnesota has no notice-of-completion mechanism at all. The 120-day
clock always runs from your own last day of work or delivery, not from any
project-wide completion date.

Statutes and sources

• Minn. Stat. § 514.01 (who has lien rights) —
  https://www.revisor.mn.gov/statutes/cite/514.01
  (accessed 2026-07-05)
• Minn. Stat. § 326B.845, subd. 2 (unlicensed person forfeits lien rights) —
  https://www.revisor.mn.gov/statutes/cite/326b.845
  (accessed 2026-07-05)
• Minn. Stat. § 514.011, subd. 1 (prime contractor's pre-lien notice) —
  https://www.revisor.mn.gov/statutes/cite/514.011
  (accessed 2026-07-05)
• Minn. Stat. § 514.011, subd. 2 (subcontractor/supplier 45-day notice) —
  https://www.revisor.mn.gov/statutes/cite/514.011
  (accessed 2026-07-05)
• Minn. Stat. § 514.011, subd. 4b (multi-unit residential notice exemption) —
  https://www.revisor.mn.gov/statutes/cite/514.011
  (accessed 2026-07-05)
• Minn. Stat. § 514.08, subd. 1 (120-day filing and service deadline) —
  https://www.revisor.mn.gov/statutes/cite/514.08
  (accessed 2026-07-05)
• Minn. Stat. § 514.12, subd. 3 (one-year foreclosure limitation) —
  https://www.revisor.mn.gov/statutes/cite/514.12
  (accessed 2026-07-05)
• Minn. Stat. § 514.02, subd. 1(b) (extra liability, residential real
  estate) —
  https://www.revisor.mn.gov/statutes/cite/514.02
  (accessed 2026-07-05)