How to file a mechanics lien in Idaho

Step by step

8 steps for a subcontractor in Idaho.

1. 1

   Step 1: Confirm your Idaho contractor registration is current

   Before you sign the contract, and keep it current for the entire time you are performing the work.

   Idaho does not just make an unregistered contractor's lien hard to enforce — it wipes it out. An unregistered contractor is 'deemed to have conclusively waived' any right to place a lien on real property. Separately, you cannot bring or maintain a court action to collect your money without pleading and proving you were registered the whole time you did the work. Since enforcing a lien means filing a lawsuit, registration is what makes everything else on this list worth doing.

   Where it goes

   Idaho Contractors Board (Idaho Code 54-5206).

   How

   Check your registration status with the Idaho Contractors Board, which administers registration under Idaho Code Title 54, Chapter 52. Registration must be in place at all times during performance, not just on the day you file.

   Proof to keep

   Your registration certificate and renewal records covering every date you worked on the job. You will have to plead and prove this in the foreclosure suit.

   What the document must contain

   • Registration in effect during the entire period you performed the work, or a statutory exemption that applies to you

   If you miss it: You lose the lien entirely — the statute treats an unregistered contractor as having conclusively waived the right to place a lien — and you cannot maintain a court action to collect the money either. Acting as a contractor without registration is also a misdemeanor.

   Idaho Code 54-5204; 54-5208; 54-5217(2); exemptions at 54-5205(opens the statute in a new tab)
2. 2

   Step 2: Check that the contractor who hired you is registered

   Before you start work, and before you accept a change order that meaningfully expands the job.

   If the contractor above you is not registered and you actually knew it, you lose your own lien rights too. Idaho protects you only if you did not have actual knowledge the contractor was unregistered, or you reasonably believed they were registered. A registered subcontractor working at the direction of an unregistered contractor keeps its lien rights; so do that contractor's employees and its material suppliers — but only under that same no-knowledge condition.

   Where it goes

   Idaho Contractors Board; and the registration number posted at the job site (Idaho Code 54-5209).

   How

   Verify the hiring contractor's registration with the Idaho Contractors Board before you begin. Idaho also requires a contractor's registration number to be posted at the site and shown on building permits, which gives you a second place to check.

   Proof to keep

   A dated screenshot or printout of the registration lookup you ran before starting, plus a photo of the registration number posted at the site. This is how you show you reasonably believed the contractor was registered.

   If you miss it: Nothing happens if the contractor is in fact registered. But if they were not and you knew it, Idaho denies you lien rights — the statute's protection runs only to a claimant who lacked actual knowledge or who reasonably believed the contractor was registered.

   Idaho Code 54-5208; 54-5209(opens the statute in a new tab)
3. 3

   Step 3: On public work, serve the 90-day bond notice on the prime contractor

   Within 90 days from the date you performed the last of the labor or furnished the last of the material or equipment.

   There is no such thing as a mechanics lien on Idaho public property. If the job is for the state, a county, a city, a school district or any other public body, your remedy is the prime contractor's payment bond. If you contracted with a subcontractor rather than directly with the bonded prime, you must give the prime written notice or you have no bond claim at all.

   Where it goes

   To the prime (bonded) contractor on the public contract — not to the public body, and not to any county recorder.

   How

   Written notice, served by registered or certified mail, postage prepaid, in an envelope addressed to the contractor at any place the contractor maintains an office or conducts business, or at the contractor's residence.

   Proof to keep

   The certified or registered mail receipt showing the date of mailing and the address used, plus a copy of the notice. Also get a copy of the payment bond from the public body early — a public contract under $50,000 may have no payment bond at all.

   What the document must contain

   • The amount claimed, stated with substantial accuracy
   • The name of the party to whom the material or equipment was furnished or supplied, or for whom the labor was performed

   If you miss it: You have no right of action on the payment bond. Because no lien can attach to public property, that is the end of your security — you are left with an unsecured contract claim against whoever hired you.

   Idaho Code 54-1927; bond requirement and $50,000 threshold at 54-1926(opens the statute in a new tab)
4. 4

   Step 4: Pin down your own last day of work

   The day payment stops, go back through your records and fix the date. Do not wait until day 80 to work it out.

   Your 90-day lien clock runs from the completion of your labor or services, or your furnishing of materials — your own last day on the job, not the day the whole project finishes. Getting this date wrong by a week is the most common way a good claim dies quietly.

   Where it goes

   Your own project file. Nothing is filed at this step.

   How

   Identify the last day you performed substantive contract work or delivered contract materials. Do not count punch-list items, warranty work, callbacks, or no-charge work — trivial or corrective work does not restart the 90 days.

   Proof to keep

   Daily logs, signed delivery tickets, dated site photos, signed timesheets and the invoice covering that last day of work. If the owner ever disputes your filing date, this is the evidence that decides it.

   If you miss it: If you calendar from a punch-list or warranty visit instead of your real last day, you will record the lien after the 90 days have run and it will be time-barred — even though you filed within 90 days of the date you wrote down.

   Idaho Code 45-507(2)(opens the statute in a new tab)
5. 5

   Step 5: Record your claim of lien with the county recorder within 90 days

   Within 90 days after the completion of your labor or services, or your furnishing of materials.

   This is the filing that creates the lien. Idaho gives every claimant the same 90 days — there is no longer window for the general contractor and no shorter one for remote tiers. The claim must be sworn to under oath, so plan on a notary.

   Where it goes

   The county recorder for the county in which the property, or some part of it, is situated. The recorder charges a fee set under Idaho Code 31-3205; the amount varies by county, so confirm it with that county recorder before you go.

   How

   File a claim for record with the county recorder. The claim must be verified by the oath of you, your agent or your attorney, to the effect that the affiant believes it to be just — so it has to be sworn before a notary or other officer authorized to administer oaths. Bring the original to record and keep a true and correct copy, because you have to serve one on the owner within days.

   Proof to keep

   The recorded copy showing the recorder's instrument number and the exact recording date. That date starts two more clocks — 5 business days to serve, and 6 months to sue — so write it on the front of the file.

   What the document must contain

   • A statement of your demand, after deducting all just credits and offsets
   • The name of the owner, or reputed owner, if known
   • The name of the person by whom you were employed, or to whom you furnished the materials
   • A description of the property to be charged with the lien, sufficient for identification
   • For residential work subject to Idaho Code 45-525: the required proof of disclosure and acknowledgment of receipt
   • Verification by the oath of the claimant, the claimant's agent, or the claimant's attorney that the affiant believes the claim to be just

   If you miss it: No lien. The 90 days is the outside limit and Idaho has no cure, no extension and no late-filing mechanism. Recording an unsworn claim, or a residential claim missing the 45-525 proof of disclosure, produces a defective lien even if you file on time.

   Idaho Code 45-507(1), (2), (3), (4); recording duties at 45-509; recorder fees at 31-3205(opens the statute in a new tab)
6. 6

   Step 6: Serve a copy of the recorded lien on the owner within 5 business days

   No later than 5 business days following the filing of the claim of lien. Business days — weekends and holidays do not count, which makes the window shorter than it sounds if you record on a Thursday.

   This is the step Idaho contractors lose liens on. Recording is not enough. A true and correct copy of the recorded claim of lien has to reach the owner within five business days of filing, and the statute gives you only two ways to do it.

   Where it goes

   The owner or reputed owner of the property, at their last known address. Note that a trustee of a deed of trust is not an 'owner or reputed owner' for this purpose, so serving the trustee does not discharge this obligation.

   How

   Either (a) have an officer authorized by law to serve process personally deliver a copy to the owner or reputed owner, or (b) mail a copy by certified mail to the owner or reputed owner at their last known address. Regular first-class mail, email, hand-delivery by your own crew, and posting on the job site do not satisfy the statute.

   Proof to keep

   The certified mail receipt stamped with the mailing date and the address used, plus the return receipt if it comes back — or the process server's return of service. Keep it with the recorded lien; the mailing date is the fact you will have to prove.

   What the document must contain

   • A true and correct copy of the claim of lien as recorded

   If you miss it: The statute says this delivery or mailing shall be made no later than 5 business days after filing. Treat a missed window as fatal to the lien: it is a mandatory step with no stated cure, and you cannot re-record to restart it if the 90 days has run.

   Idaho Code 45-507(5); definition of owner at 45-507(6)(opens the statute in a new tab)
7. 7

   Step 7: File suit to foreclose within 6 months of the recording date

   Within six months after the claim of lien has been filed. Count from the recording date, not from your last day of work.

   An Idaho lien dies six months after the claim is filed unless you have actually started a lawsuit. Nothing else preserves it — not a demand letter, not a payment plan, not recording an extension, not the owner promising to pay.

   Where it goes

   A proper court. In practice that is the Idaho district court for the county where the property is located — the same county where you recorded.

   How

   Commence proceedings in a proper court to enforce the lien. Only actually filing the case counts.

   Proof to keep

   The file-stamped complaint showing the filing date, and the case number.

   If you miss it: The lien stops binding the property. Six months after filing it no longer encumbers the building or structure at all, and there is no renewal. You are left with whatever ordinary contract claim you still have against whoever hired you.

   Idaho Code 45-510(1)(opens the statute in a new tab)
8. 8

   Step 8: Move fast if the owner petitions to bond off your lien

   Immediately on being served. The court sets the hearing at least 5 days and not more than 10 days after its order, and you only have to be served at least 2 days before that hearing.

   This is the lever the other side can pull, and it moves faster than anything else in Idaho lien practice. The owner can go to court, post a surety bond, and have your lien released from the property. Your claim then runs against the bond and the surety instead of the real estate.

   Where it goes

   The district court where the petition was filed.

   How

   Watch for service of the petition and the court's order, made in the manner provided by law for service of summons. If you intend to contest the sufficiency of the surety, you must act within the statute's exception procedure — talk to your attorney the day you are served.

   Proof to keep

   The petition, the order, the bond itself and the date you were served. Get a copy of the bond — it should be in the sum of one and one-half times your lien claim.

   If you miss it: There is no appeal from an order releasing the lien; on entry it is final for all purposes and the property comes out from under your lien. You still have a claim against the bond and surety, but your rights under the bond remain conditioned on the validity and enforceability of the lien — so the six-month suit deadline still governs your conduct.

   Idaho Code 45-518; 45-519; 45-520; 45-521; 45-522(opens the statute in a new tab)

Who can claim a lien in Idaho

Where you file

Office

County Recorder

Recording fee

$10–$25

Notarization

Required

Sworn or verified

Under oath

How it is served

Certified mail

Copies

2

Fees and office procedures change; confirm them with the recording office before you file.

What trips people up in Idaho

• Believing Idaho has a preliminary notice. It does not. There is no 20-day notice, no notice to owner, no monthly or recurring notice, and no stop notice anywhere in Idaho Code Title 45, Chapter 5 — on residential or commercial work, for any claimant type. Subs, suppliers, equipment lessors and laborers owe nothing before they file. The real damage from this myth is contractors abandoning perfectly good liens because they think they missed a deadline that never existed.
• Recording the lien and stopping there. A copy of the recorded lien must be served on the owner within 5 BUSINESS days of filing, by personal service through an officer authorized to serve process or by certified mail to the last known address. Record on a Thursday and your window closes the following Thursday, not Tuesday. This is the single most commonly missed step in Idaho.
• Counting the six months from the last day of work instead of from the recording date. Idaho's enforcement period runs six months from when the claim was filed. A contractor who records on day 89 and then counts six months from last furnishing throws away roughly three months of runway — and may believe the deadline has passed when it has not, or worse, the reverse.
• Thinking a demand letter, a payment promise or a recorded extension preserves the lien. Only commencing proceedings in a proper court within the six months does. Idaho liens cannot be renewed.
• Using a punch-list, warranty, callback or no-charge visit as the last-furnishing date. Trivial or corrective work does not restart the 90 days, and banking on a late no-charge trip to revive an expired window is how contractors discover their lien is time-barred.
• Recording an unverified claim. Idaho requires the claim to be verified by the oath of the claimant, agent or attorney that the affiant believes it to be just. An unsworn Idaho lien is defective. Budget time for a notary.
• Overstating the amount. The statute requires the demand to be stated after deducting all just credits and offsets. Do not roll attorney's fees into the lien figure — they are recoverable as costs if you win, but including them inflates the claim. Under Idaho Code 45-507(7) the prevailing party in any proceeding about the lien gets fees, so an inflated or defective lien can end with you paying the owner's lawyer.
• Working under an unregistered contractor when you knew it. Idaho denies lien rights to a claimant who had actual knowledge the hiring contractor was not duly registered. You keep your lien only if you lacked actual knowledge or reasonably believed the contractor was registered — so run the registration check before you start and keep the printout.
• Being unregistered yourself. An unregistered contractor is deemed to have conclusively waived any right to place a lien, and cannot maintain any Idaho court action to collect compensation without pleading and proving registration during the entire performance. No amount of clean paperwork fixes this. Note that material suppliers who only furnish without installing, employees working for wages, licensed design professionals and jobs under $2,000 are exempt from registration (Idaho Code 54-5205).
• Residential general contractors signing the contract before making the 45-525 disclosure. There is no cure after signing: the recorded claim of lien must contain the proof of disclosure and the homeowner's signed acknowledgment, so the defect is baked in months before anyone thinks about a lien. The exemption is narrow — it covers only repairs where the homeowner initiated contact for a bona fide emergency or necessary repairs to an electrical, plumbing or water system.
• Forgetting the second residential disclosure — the written list of every sub, materialman and rental equipment provider over $500, due a reasonable time before closing or before final payment to the GC. Separate document, separate timing, separately acknowledged, separately missable.
• Recording a lien against public property. No Idaho lien attaches to public property. A claimant who records one has not only wasted the filing, they have burned the 90-day payment-bond notice window under Idaho Code 54-1927 doing it — and that notice is the only thing between them and no remedy. Also check early whether a bond exists at all: Idaho only requires a payment bond on public contracts of $50,000 or more.
• Assuming a homeowner who already paid the general contractor is safe from your lien. Idaho has no owner-occupied residential lien bar and no full-payment defense. A sub can lien a home the owner has already paid for. The reverse mistake — telling a sub they have no residential remedy — costs them the claim.
• Liening the wrong interest. The lien reaches the land of the person who ordered the work. If a tenant hired you, you reach the tenant's interest, not the landlord's fee (Idaho Code 45-505). Find out who actually owns the property before you name an owner in the claim.
• Serving the deed-of-trust trustee instead of the owner. Idaho Code 45-507(6) says a trustee of a deed of trust is not an 'owner or reputed owner' under the chapter, so serving the trustee does not satisfy the 5-business-day service requirement.

After you file

• Two clocks start the moment you record, and both run off the recording date: 5 business days to serve the owner, and 6 months to file suit. Write the recording date on the front of the file.
• There is no way to renew or extend an Idaho lien by recording anything. The only statutory extension is narrow and rarely available: if a payment on account is made, or credit is extended with an expiration date, AND that payment or credit and its expiration date are endorsed on the record of the lien, the six months runs from the payment date or the expiration of the extension instead (Idaho Code 45-510(1)). Absent that endorsement on the record, six months from filing is absolute.
• Your lien takes priority over any mortgage or encumbrance that attached after you commenced work or began furnishing materials, and over any unrecorded encumbrance you did not know about when you started (Idaho Code 45-506). Liens within the same class rank equally regardless of who filed first.
• If the sale proceeds do not cover everyone, Idaho pays in a fixed order: laborers first, then materialmen and equipment lessors, then subcontractors, then the original contractor, and professional engineers and licensed surveyors last (Idaho Code 45-512).
• If you win, the court allows as part of the costs the money you paid to file and record the claim, plus reasonable attorney's fees (Idaho Code 45-513). Separately, in any court proceeding regarding a lien filed under Idaho Code 45-507, the prevailing party is entitled to reasonable attorney's fees and costs — which cuts both ways, and is why an inflated or defective lien is expensive rather than merely useless (Idaho Code 45-507(7)).
• If you get a judgment, the lien of that final judgment ceases ten years from the date the judgment becomes final (Idaho Code 45-510(1)).
• The owner can still bond the lien off title after you file suit. Keep watching for a petition under Idaho Code 45-518 through 45-524 for as long as the lien is on record.