An Idaho mechanics lien is a statutory claim against private real property that contractors, subcontractors, material suppliers, equipment lessors, and certain design professionals can record to secure payment for work or materials that improved the property. To hold up, the claim has to be filed with the county recorder within 90 days after your work ends, served on the owner within five business days of filing, and enforced by lawsuit within six months. Idaho courts read those requirements strictly, and one procedural slip is usually enough to sink the lien. The statute covers private projects only; public work is secured through payment bonds instead.
Who Has Lien Rights
Idaho grants lien rights broadly. Anyone who performs labor on, furnishes materials for, or rents equipment used in the construction, alteration, or repair of a building, structure, or other improvement to land can claim a lien. That includes general contractors, subcontractors, and material suppliers. The statute also extends lien rights to professional engineers and licensed surveyors who prepare designs, plans, maps, specifications, surveys, cost estimates, or provide on-site supervision.1Idaho State Legislature. Idaho Code Section 45-501 – Right to Lien
The lien secures payment whether the work was performed at the direct request of the owner or through the owner’s agent, such as a general contractor. That is what gives subcontractors and suppliers leverage even without a contract with the owner.
What the Claim of Lien Must Contain
The lien starts as a written claim recorded with the county recorder in the county where the property sits. Under Idaho Code 45-507, the claim must state:
- The amount demanded, after subtracting all credits and offsets.
- The name of the owner or reputed owner, if known.
- The name of the person who employed the claimant or to whom the materials were furnished.
- A description of the property sufficient to identify it.
- For work covered by Idaho Code 45-525’s residential disclosure requirements, proof that the required disclosure was made and acknowledged.2Idaho State Legislature. Idaho Code Section 45-507 – Claim of Lien
The disclosure requirement catches people. If your project falls under Idaho Code 45-525 and you skipped the disclosure step during the job, the claim is defective from the start because you cannot attach proof of something you never did.
The 90-Day Filing Deadline
The claim must be recorded within 90 days after you finish providing labor, services, or materials to the project. The clock runs from the date your contribution ends, not the date the overall project is completed.2Idaho State Legislature. Idaho Code Section 45-507 – Claim of Lien
Miss it and the right is gone. Idaho has not recognized a grace period or an equitable exception. Subcontractors who finish their scope early are especially exposed: your 90 days can run out while the general contractor is still on site and everyone is still talking about payment as if there’s time.
Serving the Owner Within Five Business Days
Recording is not the whole job. You have to serve a true and correct copy of the recorded claim on the owner or reputed owner no later than five business days after filing. Service can be made by personal delivery through an authorized process server or by certified mail to the owner’s last known address.2Idaho State Legislature. Idaho Code Section 45-507 – Claim of Lien
Business days, not calendar days. Weekends and holidays don’t count against you, but the window is still tight. Line up your process server or your certified mailing before you record, not after.
Where the Lien Sits in Priority
An Idaho mechanics lien does not take its place based on when it was recorded. It relates back to the date the building, improvement, or structure was commenced, or when materials or services first began to be furnished. Any mortgage, lien, or other encumbrance recorded after that date falls behind the mechanics lien. Pre-existing encumbrances keep their senior position; a mortgage recorded before construction started stays ahead.
Federal tax liens follow their own rule. Under 26 U.S.C. § 6323, an IRS tax lien is not valid against a mechanics lienor until the IRS records its notice of lien, so if you began furnishing labor or materials before that notice was filed, your lien generally has priority. A narrow carve-out protects mechanics lienors on owner-occupied residential property of no more than four dwelling units when the contract price is $5,000 or less. Outside that carve-out, a federal tax lien recorded before your work began will outrank you.3Office of the Law Revision Counsel. 26 U.S. Code 6323 – Validity and Priority Against Certain Persons
Enforcing the Lien: The Six-Month Clock
A recorded lien creates leverage, but it does not collect on its own. Idaho Code 45-510 gives you six months from the date the claim was filed to commence a foreclosure action in court. If no lawsuit is filed within that window, the lien expires automatically and cannot be revived.4Idaho State Legislature. Idaho Code Section 45-510 – Duration of Lien
One exception can extend the deadline. If the owner makes a partial payment on account, or if the parties agree to an extension of credit with a stated expiration date, and that payment or expiration date is endorsed on the recorded lien, the six months runs from the payment or credit expiration date instead.4Idaho State Legislature. Idaho Code Section 45-510 – Duration of Lien
In the foreclosure action itself, you have to prove the debt is real and the lien was properly filed. Contracts, invoices, delivery records, and proof of timely service on the owner all come into play. A successful action can result in a court-ordered sale of the property to satisfy the debt.
Subcontractors and the Payment Defense
Owners can reduce or defeat a subcontractor’s lien by showing they already paid the general contractor for the same work. Under Idaho Code 45-511, the original contractor or subcontractor can recover on the lien claim, but the owner’s prior payments to the general contractor are factored in.5Idaho State Legislature. Idaho Code Section 45-511 – Recovery by Contractor – Deduction of Debts to Subcontractors If the general contractor takes the owner’s money and disappears, the subcontractor’s collection path narrows. Waiting to see whether money trickles down is a bad plan.
Attorney Fees Cut Both Ways
The prevailing party in any court proceeding involving a mechanics lien is entitled to recover reasonable attorney fees and costs.2Idaho State Legislature. Idaho Code Section 45-507 – Claim of Lien Win the foreclosure and the owner covers your legal bill. Lose it, or lose on a procedural challenge to the lien itself, and you pay theirs. That symmetry is worth thinking about before recording a lien you are not confident you can enforce.
Lien Waivers: Don’t Sign Away Rights You Still Need
Waivers are standard practice in Idaho construction. Owners and general contractors typically require them before releasing progress or final payments. A conditional waiver takes effect only after the claimant actually receives the specified payment. An unconditional waiver takes effect immediately upon signing, whether the check clears or not.
Idaho does not prescribe a mandatory waiver form, which leaves room for confusion. The dangerous move is signing an unconditional waiver before the money is in hand. If the payment bounces or never arrives, the lien rights are already gone. Read every waiver before signing and confirm whether it is conditional or unconditional.
If the Owner Posts a Release Bond
An owner who thinks the lien is invalid or inflated does not have to wait for a court ruling to clear title. Idaho Code allows the owner to post a surety bond that releases the lien from the property; the claimant’s rights transfer to the bond, so the security shifts rather than disappearing. That lets the owner sell or refinance while the underlying dispute is worked out. The bond amount and petition process are set out in Idaho Code 45-519 and 45-520.
If the Owner Files for Bankruptcy
An owner’s bankruptcy filing triggers an automatic stay under 11 U.S.C. § 362 that halts almost all collection activity, including foreclosure of a mechanics lien. Filing a foreclosure lawsuit or proceeding with a sale after the petition can violate the stay and expose you to sanctions.6Office of the Law Revision Counsel. 11 USC 362 – Automatic Stay
A lien already properly recorded is not destroyed by the stay. It stands as a secured claim in the bankruptcy case, which generally puts you ahead of unsecured creditors when the estate is distributed. And if you have not yet recorded when the owner files, 11 U.S.C. § 546(b) preserves state-law perfection rights: you can still record the claim with the county recorder within the 90-day statutory window, because recording is an act of perfection rather than enforcement.7Office of the Law Revision Counsel. 11 U.S. Code 546 – Limitations on Avoiding Powers A mechanics lien is a statutory lien, so the lien-avoidance mechanism in 11 U.S.C. § 522(f), which reaches only judicial liens and certain nonpossessory security interests, does not apply to it.8Office of the Law Revision Counsel. 11 U.S. Code 522 – Exemptions Moving a lien claim through bankruptcy court, though, means filing a proof of claim and likely seeking relief from the stay before foreclosing, and that is work for a lawyer familiar with both Idaho lien law and federal bankruptcy procedure.