State Information | Wisconsin | National Lien Services

This is an overview of the state’s statutory approach to lien law and what contractors might want to focus on to ensure lien rights are established timely, correctly, and effectively.

While we are happy to provide this guide as a quick reference, we HIGHLY encourage that you work with a construction attorney to help you with your particular circumstances in our complex construction lien law environment.

Wisconsin Quick Overview

Pursuant code	Wis. Stat. §§ 779.01 et seq.
Prelien required for private / commercial projects	Yes
Prelien required for public projects	Yes
WI statutory relief	Full Price
Lien milestone event	Last furnishing/last invoice
Lien enforcement deadline	1 to 3 years
Waivable lien rights	Conflicting statutes
Supplier to supplier rights	Likely No
Prelien document name(s)	Notice of Right to Lien, Subcontractor Identification Notice
Prelien minimum information	Must include the statutory warning language, a general description of work, claimant contact information, and a statement of intent to claim a lien.
Prelien minimum notifications	Owner
Prelien recording requirement	No
Prelien notarized	No

Understanding the Prelien Process on Construction Projects in Wisconsin by Role

Wisconsin requires a preliminary notice on most residential or smaller commercial projects. Subcontractors and suppliers must also serve a Notice of Intent to Lien at least 30 days prior to filing the lien. A claim for lien must be filed within 6 months of last furnishing and enforced within 2 years of lien filing.

Prime/ Original / General Contractors (GCs): Prime contractors should confirm whether residential notice rules apply at project start.

Subcontractors/Trade Partners (Subs): Subcontractors should issue Notice of Intent to Lien at least 30 days before filing.

Second-tier Subcontractors: Second-tier claimants should track last-furnishing dates for 6-month filing windows.

Lower-tier Subcontractors: Lower-tier parties should preserve records proving service and timeline compliance.

Material Suppliers: Suppliers should align intent-notice timing with delivery milestones and owner notice rules.

Equipment Lessors: Lessors should document last equipment furnishing to support lien deadline calculations.

Second-tier Material Suppliers: Second-tier suppliers should coordinate lien-intent notices and statutory filing windows.

Possible Exceptions, Special Circumstances, and Caveats in Wisconsin

Owner Occupied Residential: Preliminary notice required for residential properties with 4 or fewer units unless waived by the owner.

Residential: Preliminary notice is specifically required on residential projects with four or fewer units.

Mechanic's Liens in Wisconsin

In Wisconsin, a mechanics lien claimant must serve a notice of intent to file lien at least 30 days before recording the lien, and file the lien with the circuit court within 6 months from last furnishing of labor or materials. For residential projects (four or fewer units), a preliminary notice is also required.

Suit to enforce the lien must be filed within 2 years after filing the lien. See Wis. Stat. §§ 779.02 and 779.06.

Bond Claims in Wisconsin

Wisconsin’s public works projects are governed by bond claim statutes that typically require subcontractors and suppliers to file a notice of claim with the public entity.

The statutes do not require preliminary notice on public projects, but claimants must strictly follow statutory deadlines and procedures, which are often governed by contract provisions and Wis. Stat. § 779.14.

Construction Lien Waivers in Wisconsin

Required format: Wisconsin does not require any specific statutorily required verbiage to be valid but be sure to check with your constuction attorney and consult any relevant state statutes.

Required notarization: Wisconsin does not require waivers to be notarized.

Wisconsin does not require statutory waiver forms, but waivers are permitted and commonly used. Caution should be taken not to waive lien rights prematurely.

Learn more about waivers here, including the when and how to use various types of waivers, the difference between a Lien Waiver and a Lien Release, what to look for before signing, and more.

As a client, you'll have free access to our system that easily creates statutorily correct lien waivers.
Through our technology partner Prelien Pro, you can also access best-in-class lien waiver management software, allowing you to easily track, collaborate, and share lien waivers with all your trade partners.

Assessors’ websites in Wisconsin counties

Most often, the county Assessor’s office is the go-to resource for online lien-related information for construction project parcels—ownership records, special warranty deeds, and more. Counties that we’ve not yet found online (those with “*”) link to a Google search for your convenience.

Frequently asked questions (FAQs) on Wisconsin lien processes for contractors

Do I need to send a preliminary notice on every project in Wisconsin?

No, preliminary notice is only required on residential projects with four or fewer dwelling units. However, a Notice of Intent to File Lien must be served on all projects at least 30 days before recording a lien.

When do I have to record my mechanics lien in Wisconsin?

You must file your lien with the clerk of the circuit court within 6 months after the date of your last labor or materials furnished to the project.

Is it enough to just file the lien, or do I have to notify the owner too?

You must serve the property owner with a copy of the filed lien within 30 days after filing it with the court.

What happens if I miss the 30-day notice of intent deadline before filing a lien?

If you fail to serve the Notice of Intent to File Lien at least 30 days before filing the lien, your lien rights will be invalid.

Can I still foreclose my lien a year after I file it?

No, you must initiate a foreclosure action within 2 years of filing the lien, or the lien becomes unenforceable.

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Our Guide to Preliens, Waivers, Mechanic’s Liens, and Bond Claims in Wisconsin