WI · Mechanics Lien Law
Wisconsin Mechanics Lien Law: Deadlines, Notices & Filing Guide
This overview explains Wisconsin mechanics lien and public bond claim deadlines under Wis. Stat. § 779.06 and Wis. Stat. §§ 779.14(2) & 779.15. The mandatory 30-day Notice of Intent and 6-month recording deadline make careful sequencing essential to preserving lien rights.
Wisconsin mechanics lien deadlines at a glance
Wisconsin recommends, but does not require, a pre-lien notice within 60 days of first furnishing as a best practice. That is separate from the mandatory 30-day Notice of Intent to Lien that must precede the actual lien filing, so claimants should not confuse the two.
Wisconsin requires a two-step process: a Notice of Intent to Lien must be served on the owner at least 30 days before filing, and the lien claim itself must then be recorded within 6 months of last furnishing labor or materials, under Wis. Stat. § 779.06. Skipping the mandatory NOI step invalidates the lien that follows it.
An action to enforce a Wisconsin construction lien must be commenced within 2 years of the date the lien claim was filed.
A Wisconsin claimant without privity with the prime contractor must serve written bond claim notice within 90 days of last furnishing labor or materials. Claimants in direct privity may instead, or additionally, pursue a Lien on Public Funds under § 779.15 by filing notice with the public body before final payment reaches the prime contractor.
Primary statute
Wis. Stat. § 779.06 · Wis. Stat. §§ 779.14(2) & 779.15
Who can file a mechanics lien in Wisconsin?
Contractors, subcontractors, sub-subcontractors, material suppliers, and qualifying design professionals furnishing labor, materials, or services in Wisconsin may claim a construction lien.
Overview of Wisconsin lien practice
Wisconsin's lien process hinges on getting the sequence right rather than just meeting a single deadline. The mandatory Notice of Intent to Lien must be served on the owner at least 30 days before the lien is filed, and skipping this step invalidates the lien altogether, making it the most consequential procedural trap in the state. Only after that notice period runs can the claimant record the lien itself, and the overall recording deadline is 6 months from last furnishing under Wis. Stat. § 779.06. A separate, optional pre-lien notice within 60 days of first furnishing is recommended practice but should not be confused with the mandatory NOI. Public project claimants without privity with the prime contractor must serve bond claim notice within 90 days of last furnishing, while those in direct privity have the added option of a Lien on Public Funds claim filed before final payment. Milwaukee projects carry their own accelerated 20-day notice requirement with the City Clerk and Commissioner of Public Works. As always, correct county recording and identification of the record owner remain essential, and federal property is not lienable.
Common pitfalls on Wisconsin projects
Treating the 30-day NOI as optional
The 30-day Notice of Intent to Lien is mandatory and cannot be waived before filing the lien claim.
Filing the lien before the NOI period runs
Failure to properly serve the NOI before filing invalidates the subsequent lien claim.
Missing Milwaukee's accelerated notice rule
On City of Milwaukee projects, a Notice of Claim must be filed with the City Clerk and Commissioner of Public Works within 20 days of last furnishing.
Wisconsin mechanics lien FAQs
When must a mechanics lien be recorded in Wisconsin?
A Notice of Intent to Lien must be served at least 30 days before filing, and the lien claim itself must be recorded within 6 months of last furnishing.
Is preliminary notice required in Wisconsin?
A pre-lien notice within 60 days of first furnishing is recommended best practice, separate from the mandatory 30-day Notice of Intent to Lien.
How long do I have to enforce a lien in Wisconsin?
An enforcement action must be commenced within 2 years of the date the lien claim was filed.
What about Wisconsin public projects?
A claimant without privity must serve bond claim notice within 90 days of last furnishing, while direct-privity claimants may also file a Lien on Public Funds before final payment to the prime.
Filing a Wisconsin mechanics lien or bond claim?
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This page is general information and not legal advice. Statutes change — verify against the official text linked above.