ID · Mechanics Lien Law
Idaho Mechanics Lien Law: Deadlines, Notices & Filing Guide
Idaho mechanics lien deadlines run from last furnishing under Idaho Code § 45-507, with public bond claims governed by Idaho Code §§ 54-1926 to 54-1930. This overview covers recording windows, foreclosure timing, and notice practices for contractors and suppliers working in Idaho.
Idaho mechanics lien deadlines at a glance
Idaho does not impose a preliminary notice requirement on private projects for most claimant tiers. That means most contractors and suppliers can proceed straight to recording a lien without a preparatory notice step, though it also removes an early opportunity to put the owner on notice of an unpaid balance.
A claimant must record its mechanics lien within 90 days after last furnishing labor or materials to the project, under Idaho Code § 45-507. The clock runs from the claimant's own final date on the job, not the project's overall completion date, so each party tracks its own last-furnishing date independently.
Once a lien is recorded, the claimant has six months to file a foreclosure lawsuit to enforce it, or the lien loses its effect.
Public improvements in Idaho are covered by payment bonds under the Idaho Public Contracts Bond Act rather than by liens against government property. As best practice, claimants should serve a bond claim notice within 90 days of last furnishing labor or materials, mirroring the private lien deadline even though the statute frames it as a recommendation.
Primary statute
Idaho Code § 45-507 · Idaho Code §§ 54-1926 to 54-1930
Who can file a mechanics lien in Idaho?
Idaho lien rights extend to general contractors, subcontractors, sub-subcontractors, material suppliers, and, where the statute permits, design professionals who furnished labor, materials, or services to improve real property in the state.
Overview of Idaho lien practice
Idaho's lien statute rewards claimants who keep close records of their own labor and material furnishing dates, since the 90-day recording window under Idaho Code § 45-507 begins to run the moment a claimant's own work on the project ends. Because Idaho does not generally require a preliminary notice on private jobs, many claimants skip an early notice step entirely, which places even more weight on accurately calculating the last-furnishing date and recording promptly in the correct county. Once a lien is on record, the six-month foreclosure deadline moves quickly, so claimants should not treat recording as the finish line. On public projects, Idaho substitutes a payment bond claim for a lien against the property, since public property cannot be liened, and prudent claimants treat the 90-day window as firm even though it is described as recommended practice. As with any state, confirming the correct owner of record and recording county before filing protects the lien from later challenges.
Common pitfalls on Idaho projects
Missing the 90-day recording window
Because Idaho's deadline runs from each claimant's own last furnishing date, tracking that date carefully is essential; missing it forfeits lien rights entirely.
Skipping notice on public jobs
Even though Idaho does not statutorily require a public bond claim notice within a set period, waiting past 90 days after last furnishing risks disputes over timeliness.
Letting the foreclosure clock lapse
A recorded lien is only good for six months; failing to file a foreclosure action within that window renders the lien unenforceable.
Idaho mechanics lien FAQs
When must a mechanics lien be recorded in Idaho?
The lien must be recorded within 90 days after the claimant's last day furnishing labor or materials to the project, per Idaho Code § 45-507.
Is preliminary notice required in Idaho?
No. Idaho does not require a preliminary notice for most tiers of claimant on private projects, so a lien can typically be filed without a prior notice step.
How long do I have to enforce a lien in Idaho?
A foreclosure lawsuit must be filed within six months of recording the lien, or the lien becomes unenforceable.
What about Idaho public projects?
Public work is protected through payment bonds under the Idaho Public Contracts Bond Act, and claimants should serve a bond claim notice within 90 days of last furnishing as a matter of best practice.
Filing a Idaho mechanics lien or bond claim?
My Lien Lawyer coordinates mechanics lien filings, bond claims, and construction collections in Idaho — directly or through our vetted local-counsel network. The first call is free.
Not sure whether a service bureau is enough? See why a law firm matters.
This page is general information and not legal advice. Statutes change — verify against the official text linked above.