Minnesota Lien & Bond Law: What Contractors, Suppliers, and Equipment Rental Companies Need to Know
Current through June 1, 2025
Whether you’re a subcontractor, supplier, or equipment rental provider, navigating Minnesota’s lien and bond laws correctly is the difference between getting paid and losing your leverage. While Minnesota hasn’t implemented substantive statutory changes over the last year, it’s still critical to understand the rules, deadlines, and nuances that apply to commercial and public construction projects.

Private (Commercial) Projects: Mechanic’s Liens in Minnesota
Who Has Lien Rights?
You may file a mechanic’s lien if you have a contract with:
- The owner
- The general contractor
- A subcontractor
- Or in many cases, even a sub-subcontractor (though enforcement at this tier may be challenged).
Preliminary Notice Requirements: Simple for Most, Critical for Some
Minnesota keeps this straightforward-no preliminary notice is required on commercial projects unless the project is small (under 5,000 sq. ft. of new construction or additions).
For these small commercial projects:
- Serve preliminary notice within 45 days after your first date of furnishing
- Notice must be served via certified mail.
- Minnesota applies the “mailbox rule”, meaning service is effective the day you drop it in the mailbox.
If you’re unsure about square footage, contact an attorney early-missing this notice kills your lien rights.

When to File Your Lien
Your mechanic’s lien must be:
- Filed with the district court within 120 days after your last date of furnishing labor or materials.
This is a hard deadline-no exceptions, no extensions.
Foreclosure Lawsuit Deadline
Minnesota requires one of the strictest enforcement timelines in the country:
- You must file your foreclosure action and personally serve all required parties within one year of your last furnishing date.
This is different from many states where service can happen after filing.
Plan Ahead: Most lien claimants should start this process by month 10 to allow adequate time for title search and personal service.
“Double Jeopardy” Lien Rights
One of the most claimant-friendly features of Minnesota lien law:
- A lien remains valid even if the owner already paid the contractor in full.
Your lien attaches to the property regardless of whether money has already left the owner’s hands.

Public Projects: Payment Bond Claims in Minnesota
When you’re working on state, municipal, or other public projects, mechanic’s liens are not available. Instead, your protection comes from the payment bond.
Which Projects Require a Payment Bond?
If the prime contract is $175,000 or more, the general contractor must furnish:
- 100% payment bond, and
- A performance bond.
If the public body fails to obtain a bond, they are financially liable to unpaid subcontractors and suppliers.
Who Can Make a Bond Claim?
You’re eligible if you contracted with:
- The prime contractor, or
- A subcontractor.
While many sub-subcontractor claims have succeeded historically, sureties increasingly challenge them-so proceed with caution.
Preliminary Notice? Not Needed.
Minnesota does not require any early notice to secure bond rights.
Final Bond Claim Notice Deadline
This is critical.
You must:
- Serve a written bond claim notice
- Via certified mail
- On both the general contractor and the surety
- Within 120 days after your last date of furnishing labor or material
Use the addresses listed on the payment bond document.
A notice sent to the wrong address-even if the company receives it-may be considered invalid.
Tip: Request the payment bond early-ideally at project kickoff.
Does the Mailbox Rule Apply?
Unlike private projects, the “mailbox rule” has not been confirmed for public bond notices.
To be safe:
Make sure the GC and the surety receive the notice before day 120.
Lawsuit Deadline on Bond Claims
Your lawsuit against the surety must be filed within one year of your last furnishing date. This mirrors the private lien foreclosure deadline.
No Lien Against Public Funds
Minnesota does not allow filing a lien against money held by the public entity (unlike some other states). Bond claims are your only remedy-unless the public body failed to obtain a bond.
Other Key Minnesota Construction Law Notes
Equipment Rental
Rental equipment providers have full lien rights and may also assert bond claims.
Attorney’s Fees
Minnesota courts may award attorney’s fees:
- In mechanic’s lien foreclosure actions
- And in bond claim litigation against a surety
This makes enforcement more economically viable.
Pay-If-Paid Clauses
These clauses can be enforceable-but only if the contract language is clear and unequivocal. If enforceable, your right to payment may be contingent on the contractor receiving payment from the owner.
2025 Takeaways: What Minnesota Claimants Should Be Doing
- Track your first and last furnishing dates carefully. These control all deadlines.
- Request the payment bond early on all public projects.
- Serve notices by certified mail, and keep mailing receipts.
- Calendar the 120-day and one-year deadlines immediately when a project begins.
- Act early-especially on anything requiring court filing or personal service.
- Don’t assume the GC or owner will “take care of it.” Lien and bond rights are self-help tools; protect yourself.
Navigating Minnesota’s lien and bond laws can feel complex, but you don’t have to manage it alone. Protecting your payment rights starts with understanding your deadlines, documenting your work, and taking action early-no matter the size of the project. At Wagner, Falconer & Judd, our construction law team helps contractors, suppliers, and equipment rental companies safeguard their interests and avoid costly missteps. If you have questions about a specific project, notice requirements, or enforcing a lien or bond claim, our attorneys are here to guide you every step of the way. Reach out to WFJ for clear answers, practical support, and the confidence that your rights are protected.










