Wisconsin Mechanics Lien: Notices, Deadlines & Foreclosure

A Wisconsin mechanics lien is a legal claim a contractor, subcontractor, supplier, or design professional records against real estate to secure payment for work or materials that improved it. You file the claim with the clerk of circuit court in the county where the property sits, and you have six months from your last day of work to do it. Before you file, you have to serve a 30-day notice of intent on the owner, and in many residential jobs you also had to send a preliminary notice much earlier. Miss any of those steps and the claim is dead, no matter how clearly you are owed the money.

Who Can Claim a Lien

Section 779.01 lets anyone who performs or furnishes labor, services, materials, plans, or specifications used to improve land claim a lien, as long as they follow the notice rules in Section 779.02.¹ That takes in general contractors (the statute calls them “prime contractors”), subcontractors, material suppliers, equipment lessors, architects, engineers, surveyors, and construction managers.

Laborers and mechanics employed by a prime contractor or subcontractor also have lien rights, and they get a procedural break: they are exempt from the preliminary notice requirement.

Property owners cannot lien their own land. And if you have no contractual connection to the owner or a prime contractor, your lien rights thin out quickly, because the statute ties “lien claimant” status to a contract for improvement entered into by the owner.

The Two Preliminary Notices

Wisconsin’s notice rules are where most claims fail. Depending on who you are and what you built, you may owe the owner one notice, two, or none at all.

The Section 779.02 Preliminary Notice

A prime contractor who hires any subcontractors or suppliers must put a statutory notice of lien rights in the written contract with the owner. If there is no written contract, the prime contractor has to serve the notice on the owner within 10 days after work begins.² The notice uses specific statutory language warning the owner that subs and suppliers may lien the property. A prime contractor who skips it loses lien rights unless every sub and supplier is paid in full or has waived.

Subcontractors, suppliers, and other non-prime claimants face a different deadline: a written notice served on the owner within 60 days of first furnishing labor, services, or materials. A late notice does not wipe out lien rights entirely, but it eliminates any claim for work performed before the owner actually received it.²

Several categories of claimants are exempt from the 779.02 notice:

Laborers and mechanics employed by a prime contractor or subcontractor
Claimants who contract directly with the owner, unless they are a prime contractor using subs
Claimants on improvements that add more than four residential units or are partly or wholly nonresidential
Owner-prime contractors who personally own the land being improved

The commercial-and-large-residential exemption matters. On a commercial project or a big apartment build, subs generally do not need to send the 60-day notice. The full preliminary notice regime mainly bites on smaller residential jobs with four or fewer family living units.²

The 30-Day Notice of Intent to File

Every lien claimant, with no exceptions, must serve a written notice of intent on the owner at least 30 days before filing the claim. The notice has to describe the nature of the claim, the amount owed, and the property and improvement involved.³ It functions as a final demand: one last chance for the owner to pay before the claim becomes public record.

This notice applies even to prime contractors who already satisfied the 779.02 requirement, and even on commercial projects where the preliminary notice was never required. Skip it, or serve it late, and the lien is invalid.

Filing the Claim With the Circuit Court

Once the 30-day notice period runs without payment, you file the claim for lien with the clerk of circuit court in the county where the property is located. Not the register of deeds. This is a detail that trips up first-time filers in Wisconsin.³

The claim must contain:

A statement of the contract or demand the claim is based on
The name of the person against whom the demand is made, plus the claimant’s name and any assignee
The last date you performed or furnished labor, services, materials, plans, or specifications
A legal description of the property matching county records
The amount claimed and all other material facts

Attach a copy of the 779.02 preliminary notice (if one was required) and a copy of the 30-day notice of intent. The claim must be signed by the claimant or an attorney. The statute says it “need not be verified,” so you do not have to swear to it under oath, and it can be amended later like any pleading.³

Within 30 days after filing, you must serve a copy of the filed claim on the property owner. This is separate from the earlier notices, and skipping it creates another procedural defect that can sink the lien.⁴

The Deadlines That End the Claim

Two hard cutoffs drive everything. Both come from Section 779.06(1), and courts enforce them strictly, with no equitable extensions.³

Six months to file the claim. The clock runs from the last date you furnished labor, services, or materials, not the contract date or the first day of work. Trivial return visits and warranty callbacks generally do not restart it.
Two years to foreclose. After filing, you must bring a foreclosure action within two years or the lien expires on its own.

Work backward from the six-month deadline and the real pressure point shows up. The 30-day notice of intent has to be served before you file, so you have roughly five months from your last day on the job to send that notice and still leave time to file inside the six-month window. Waiting until month five to start the notice process is how claimants get boxed out.

Where a Mechanics Lien Falls in Line

A construction lien in Wisconsin takes priority over any lien that originates after visible commencement of the improvement. Priority dates to when work visibly started on the property, not to the day you recorded the claim.¹

For new construction, commencement means substantial excavation for foundations, footings, or the base of the structure. When new construction is added to an existing building, commencement is the earlier of substantial excavation or substantial preparation of the existing structure to receive the addition.¹

A construction lien also beats an unrecorded mortgage granted before work started, if the claimant had no actual knowledge of the mortgage before commencement. A properly recorded earlier mortgage keeps its senior position, and so do property tax liens and local special assessments. Among construction lien claimants themselves, there is no pecking order; if sale proceeds fall short, claimants share proportionally.

Enforcing the Lien Through Foreclosure

A filed lien is a placeholder. To actually collect, you file a foreclosure action in the circuit court of the county where the property sits, within the two-year window. The foreclosure follows the same general procedure as a mortgage foreclosure under Chapter 846.⁵

All claimants with filed liens on the property can join as plaintiffs in one action. Those who do not join can be named as defendants, and anyone who acquires a lien or buys the property after suit begins can be brought in before judgment.⁵ A judgment can order the property sold at a sheriff’s sale, with a redemption period for the owner before the sale. When several claimants are involved, the court distributes proceeds under the priority rules. Enforcement is the stage where an attorney becomes close to essential; procedural slips here can invalidate a lien that was perfectly valid when filed.

Clearing a Lien From the Property

Owners have two main ways to get a lien off the title: pay it or bond around it.

When the claimant receives full payment, the lien should be satisfied and removed. Wisconsin does not spell out a detailed statutory satisfaction procedure, but a contractor who leaves a paid-off lien on the record exposes themselves to a slander of title claim, which can carry damages and attorney fees.

If the owner needs to clear the lien without paying the disputed amount (to refinance or sell, for example), Section 779.08 lets the owner or another interested party file an undertaking with the clerk of circuit court. The undertaking must be backed by a surety bond or cash equal to at least 125 percent of the lien claim, and the surety must file an affidavit showing Wisconsin net worth, above debts and liabilities, equal to at least that same 125 percent. Once the court approves the surety, the clerk removes the lien from the docket. The claim then attaches to the posted security instead of the real estate, and the underlying payment dispute continues in court.⁶

Contract Clauses That Cannot Take the Right Away

Section 779.135 voids several contract provisions that would otherwise undercut lien rights on Wisconsin projects.

Advance lien waivers are void. A clause requiring a contractor, subcontractor, or supplier to waive lien rights before being paid is unenforceable. You can waive after payment; no one can force you to waive in advance as a condition of getting the job.⁷

Choice-of-law and forum clauses pointing out of Wisconsin are void in contracts for the improvement of Wisconsin land.

Pay-if-paid clauses are void. A prime contractor cannot make payment to a subcontractor contingent on the prime being paid by someone else. Pay-when-paid clauses that merely set a timing mechanism, such as paying the sub within 30 days after the prime receives payment from the owner, are permitted because they do not make the owner’s payment a condition precedent to the sub ever getting paid.⁷

Public Projects: No Lien on the Property

You cannot lien government-owned property in Wisconsin. On public improvements, the statute instead requires the prime contractor to post a payment and performance bond when the contract price exceeds $369,000 for state contracts or $148,000 for local government contracts. Unpaid subs and suppliers can also claim a lien under Section 779.15 against money the government entity still owes the prime contractor, by serving written notice on the government entity before it pays the prime. Below the bond thresholds, public contracts must include provisions for direct payment to subs or joint checks.⁸

Penalties for a Wrongful or Fraudulent Lien

Filing a lien you know is false or frivolous carries real exposure. On the civil side, the owner can bring a slander of title claim for actual damages and attorney fees, and courts are especially unsympathetic when the lien has obvious procedural defects, like filing past the six-month deadline or without the 30-day notice of intent.

Wisconsin also treats it as a potential crime. Under Section 943.60, filing a lien or other instrument affecting title to property, knowing the contents to be false, fraudulent, or frivolous, is a Class H felony.⁹ A Class H felony carries up to six years in prison and a fine of up to $10,000. The statute reaches anyone who causes another person to file such an instrument on their behalf, so working through an attorney or agent does not insulate you.

File for work you actually performed, materials you actually supplied, and amounts you are legitimately owed. Inflating the number, filing after the deadline, or filing without the required notices all increase the risk on both the civil and criminal side.

1
Wisconsin State Legislature. Wisconsin Code 779.01 – Construction Liens
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Wisconsin State Legislature. Wisconsin Code 779.02 – Notice Required to Preserve Lien Rights
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Wisconsin State Legislature. Wisconsin Code 779.06 – Filing Claim and Beginning Action
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Wisconsin State Legislature. Wisconsin Code 779.06 – Filing Claim and Beginning Action
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Wisconsin State Legislature. Wisconsin Code 779.09 – Foreclosure of Lien; Procedure
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Wisconsin State Legislature. Wisconsin Code 779.08 – Release of Lien; Undertaking
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Wisconsin State Legislature. Wisconsin Code 779.135 – Construction Contracts, Form of Contract
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Wisconsin State Legislature. Wisconsin Code 779.14 – Public Works, Contracts, and Bonds
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Wisconsin State Legislature. Wisconsin Code 943.60 – Criminal Slander of Title