Wisconsin Mechanics Lien Law for Homeowners and Contractors

A construction lien in Wisconsin is a claim against property

A construction lien is a claim against a piece of property for unpaid work on it. Under Wis. Stat. § 779.01, a person who performs, furnishes, or procures labor, services, materials, plans, or specifications for an improvement may have a lien on the property, subject to the requirements of the chapter.^[1]

That reach is wider than many owners expect.

The lien right is not limited to the prime contractor. It extends to qualifying subcontractors, laborers, suppliers, and design professionals who furnish plans or specifications.^[1][5]

Chapter 779 is titled "Liens" and also holds non-construction liens, so read only the construction lien provisions for a building project.^[5] A filed lien does not mean the claimant is paid on the spot.

The claimant still has to follow the chapter's later steps to enforce it.^[3][5]

Notices contractors and suppliers must send

Notice runs in two directions. One notice comes from the prime contractor at the start of the job, and another comes from a lien claimant who has not been paid.

The prime contractor's notice to the owner

Under § 779.02(5), a prime contractor must include the statutory lien notice in a written owner contract. If there is no written contract, the notice must be served on the owner or the owner's authorized agent within 10 days after the first labor, services, materials, plans, or specifications are performed, furnished, or procured.^[2]

A claimant's notice before payment

Section 779.06 adds a protection tied to payment. Before payment is made to the prime contractor or a subcontractor, a lien claimant must serve written notice of the claim on the owner or authorized agent, and on any construction-fund mortgage lender.^[4]

Once the owner and lender receive that notice, they must withhold enough money to pay the claim, subject to the statute's procedures.^[4]

If you get a notice like this, compare it with your contract and payment records right away. Then talk to a Wisconsin attorney.

Side by side

The two notices

Prime contractor's notice

• Goes to the owner
• In the written contract, or within 10 days of first furnishing

vs

Claimant's notice

• Goes to the owner and any construction-fund mortgage lender
• Served before payment is made

Lien filing deadlines, tied to each event

Deadlines are where lien claims succeed or fail, and the statute ties each one to a specific event. The periods the cited statutes state are these, in the order they arise:

1. Start of the job, no written contract: the prime contractor serves the lien notice on the owner within 10 days after the first labor, services, materials, plans, or specifications are furnished (§ 779.02(5)).^[2]
2. Before payment moves down the chain: a claimant serves written notice on the owner and any construction-fund mortgage lender (§ 779.06).^[4]
3. Claim for lien: filing and service requirements are set out in § 779.06 and the chapter compilation.^[4][5]
4. Enforcement and foreclosure: the chapter covers enforcement and foreclosure of a filed claim.^[5]

Legal commentary commonly describes a filing deadline that runs from the last work or furnishing, with a copy of the claim going to the owner. Confirm the exact deadline with your state's lien filing office.

Read the filing period and the foreclosure deadline directly in § 779.06 and the rest of ch. 779 before relying on any figure. A missed date can end the claim.^[5]

Checking whether a lien exists

Before you buy, refinance, or pay a final invoice, search the court records. Wisconsin Circuit Court Access (wcca.wicourts.gov) is the public search tool.

Confirm with the clerk of circuit court in the county where the property sits how filings are recorded there.

Ways homeowners can protect themselves

Start with a written contract that names the prime contractor, the scope, the payment schedule, and how change orders are handled. A written contract also brings the statutory lien notice to you at signing, because § 779.02(5) requires the prime contractor to include it.^[2]

Then control the paperwork around payment.

Wis. Stat. § 779.05 says a signed construction-lien waiver is valid and binding, and a claimant may refuse to give one unless paid in full for what the waiver covers.^[3] A waiver affects lien rights, not other contract rights.^[3]

In practice, that means this:

• Ask for a signed, project-specific waiver from the prime contractor and from each subcontractor and supplier before each substantial payment, and especially the final one.
• Expect to pay for what the waiver covers, since the claimant can decline otherwise.
• Keep contracts, invoices, canceled checks, notices, and change orders together.

A waiver from the general contractor alone may leave a subcontractor's or supplier's claim untouched, so collect them down the chain.

Checklist

Before each payment

0 of 4 ticked

• Get a signed, project-specific waiver from the prime contractor
• Get waivers from each subcontractor and supplier
• Pay only for what each waiver covers
• Keep contracts, invoices, canceled checks, notices, and change orders together

Tick them off as you go. Nothing is saved or sent.

If a lien is already recorded, ask a Wisconsin construction attorney or title professional about a release, settlement, or challenge. Do not assume a demand letter is valid until you confirm the claimant did lienable work and followed the statute.

This page is general information, not legal advice.

Contractors and suppliers should treat lien rules as part of the job

If you are a contractor or supplier, treat the notice and filing rules as part of the job, not an afterthought.

1. Put the lien notice in the contract. A prime contractor includes the statutory notice in the written owner contract, or serves it within 10 days of first furnishing if there is no written contract.^[2]
2. Serve notice before payment moves. A claimant serves written notice of the claim on the owner or authorized agent and any construction-fund mortgage lender before payment goes to the prime contractor or subcontractor.^[4]
3. Be careful with waivers. You may refuse to sign one until you are paid in full for what it covers, and a signed waiver is binding.^[3]
4. File and serve the claim on time. Follow § 779.06 and the chapter's enforcement provisions, and keep proof of service.^[4][5]
5. Keep records. Document the contract, payment history, change orders, notices, and completion dates from day one.

Check that the work you perform falls under your license category through the Wisconsin license guide and the dwelling contractor license page. Contractors looking for work can see For Wisconsin Contractors.

Have a Wisconsin construction attorney review any claim before it is filed. The technical deadlines are strict.

Quick answers

Who can file a construction lien in Wisconsin?

A person who performs, furnishes, or procures labor, services, materials, plans, or specifications for an improvement may have a lien, subject to ch. 779.

Can a contractor refuse to sign a lien waiver?

Yes. A claimant may refuse to give a waiver unless paid in full for what the waiver covers.

Does a signed waiver affect other contract rights?

No. A waiver affects lien rights, not other contract rights.