How Arizona Mechanics' Liens Work: A Guide for Homeowners and Contractors

If you've worked on a construction project in Arizona — whether as a contractor who hasn't been paid or a homeowner who's received a lien notice you didn't expect — the mechanics' lien process can feel confusing. Arizona's mechanics' lien statutes (A.R.S. § 33-981 et seq.) may give eligible contractors, subcontractors, suppliers, and certain design professionals a powerful tool to secure payment for qualifying work or materials, but the process comes with strict rules and deadlines on both sides.

What Is a Mechanics' Lien?

A mechanics' lien is a legal claim recorded against real property to secure payment for labor, materials, or professional services that improved that property. If the lien isn't resolved, the lienholder may eventually be able to force a sale of the property to satisfy the debt.

For Contractors and Subcontractors: Protecting Your Right to Get Paid

Preliminary 20-day notice. With a limited exception for persons performing actual labor for wages, a potential lien claimant generally must serve a preliminary 20-day notice to preserve mechanics' lien rights. The notice must generally be served on the property owner, original contractor, construction lender if any, and the party that hired the claimant.

The notice should ordinarily be served within 20 days after the claimant first provides labor, professional services, materials, equipment, fixtures, or tools to the project. A late notice may still preserve lien rights, but generally only for work or materials furnished within the 20 days before service and afterward. Skipping this step, or serving it too late to cover the bulk of the work, can substantially limit or defeat a later lien claim.

Recording deadlines. A lien claimant generally must record a sworn notice and claim of lien within 120 days after statutory "completion" of the project. If a valid notice of completion is recorded and properly served, the recording deadline may be shortened to 60 days after the notice is recorded.

The statutory definition of "completion" may differ from the date a particular contractor or supplier finished its own work — for most projects, it is the earlier of 30 days after final inspection and written final acceptance by the permitting authority, or 60 consecutive days of cessation of labor, subject to specified exceptions. Because these deadlines are technical and project-specific, claimants should calculate them carefully rather than relying on a verbal completion date. The recorded lien must also be served on the owner within a reasonable time after recording.

Filing suit to foreclose. Recording the lien alone doesn't collect the debt. A lien claimant generally must file an action to enforce the lien within six months after recording it and record a notice of pendency of action (lis pendens) in the county where the property is located. If those steps are not timely taken, the lien does not continue. A court may award reasonable attorney fees to the successful party in a lien-enforcement action.

Confirm you are eligible to claim a lien. Performing work or supplying materials does not alone establish a lien right. A person required to hold an Arizona contractor license generally must hold a valid license to assert lien rights, and a professional-services claimant must generally hold the applicable certificate of registration and have the required contractual connection to the owner, architect, engineer, or contractor with an owner agreement. Licensing, registration, contractual-relationship, preliminary-notice, and documentation requirements may all affect whether a claimant can enforce a lien.

Keep your paperwork organized. Contracts, change orders, invoices, delivery tickets, and correspondence about payment disputes all matter if a lien claim is challenged. The party asserting the lien carries the burden of proving the amount and validity of the claim.

For Property Owners: What to Do If a Lien Is Recorded Against Your Property

Don't ignore it. A recorded lien can cloud your title and interfere with refinancing or selling your property, even if you believe the underlying claim is wrong.

Check whether the owner-occupant rule applies. Arizona provides special mechanics' lien protection for many owner-occupied one- and two-family residential properties. If the owner held title before the work began and resides, or intends to reside, in the property as a home, a contractor, subcontractor, or supplier generally cannot record a lien unless it has a written contract directly with the owner. An owner-occupant cannot waive this protection by contract.

This rule is fact-specific and does not protect every residential property. It may not apply, for example, to rental or investment property, a property acquired after work begins, or a claim asserted by a contractor with a direct written agreement with the owner.

Check the paperwork carefully. Mechanics' lien rights depend on compliance with detailed statutory prerequisites. A lien may be vulnerable if the claimant did not timely give required preliminary notice, timely record and serve the lien, include required lien information, or timely commence and record the foreclosure action. Whether a defect invalidates a particular lien depends on the statute and facts, separate from any dispute about the underlying work.

Consider a lien-release bond. An owner, contractor, lender, or other interested party may record a qualifying surety bond to discharge the property from a perfected mechanics' lien. The bond generally must equal 150% of the amount claimed in the lien. This can permit a sale or refinancing to proceed while shifting the lien dispute from the property to the bond.

Look at your contract with the general contractor. If you paid your general contractor in full and a subcontractor wasn't paid, your rights and remedies may depend on the specific terms of your contract and whether you obtained lien waivers at each payment.

Why Deadlines Matter So Much Here

Arizona mechanics' lien law is deadline-driven and technical. A missed preliminary-notice, recording, service, lawsuit, or lis pendens deadline can defeat an otherwise legitimate lien claim. Owners should act promptly to assess the lien, preserve payment records and waivers, and consider whether a release bond or other response is appropriate. Contractors, subcontractors, suppliers, and design professionals should calendar the statutory deadlines early and preserve proof of service and project records.

Frequently Asked Questions

How long does a contractor have to record a lien in Arizona?

A lien claimant generally must record within 120 days after statutory "completion" of the project, or within 60 days if a valid notice of completion is recorded and properly served. Completion has a specific statutory meaning that may not match the date a particular contractor finished its own work.

Can a contractor put a lien on my house if I live in it?

Arizona provides special protection for many owner-occupied one- and two-family homes: if the owner held title before the work began and resides, or intends to reside, in the property, a contractor, subcontractor, or supplier generally cannot record a lien unless it has a written contract directly with the owner. This protection cannot be waived by contract.

What happens after a lien is recorded?

Recording a lien doesn't collect the debt by itself. The claimant generally must file an action to foreclose within six months of recording and record a notice of pendency of action (lis pendens), or the lien does not continue.

This article is for general informational purposes only and does not constitute legal advice. Reading this article or contacting Magnus Law does not create an attorney-client relationship. Every case is different; consult a licensed attorney about your specific circumstances.