Mechanic's liens on your house from an unpaid contractor

A mechanic’s lien, sometimes called a construction lien or builders lien, is a legal claim against a property for unpaid work or materials used to improve it. A valid lien can make selling, refinancing, or insuring title more difficult, but it usually does not transfer ownership of your house automatically.

Jurisdiction
General — United States, England & Wales, Canada, Australia
Topic
Real Estate
Last updated
Sep 26, 2026
Editorial status
Not yet reviewed by a licensed attorney

General legal information, published for everyone. It does not apply the law to anyone’s particular situation and is not legal advice. Laws change and differ by place; check the primary sources below.

Quick summary

  • A mechanic’s lien, sometimes called a construction lien or builders lien, is a legal claim against a property for unpaid work or materials used to improve it.
  • A valid lien can make selling, refinancing, or insuring title more difficult, but it usually does not transfer ownership of your house automatically.
  • The rules and deadlines depend heavily on the state, province, or country where the property is located.

What it means

A mechanic’s lien, sometimes called a construction lien or builders lien, is a legal claim against a property for unpaid work or materials used to improve it. A valid lien can make selling, refinancing, or insuring title more difficult, but it usually does not transfer ownership of your house automatically. The rules and deadlines depend heavily on the state, province, or country where the property is located.

How the law works

How the law usually works

Mechanic’s liens are generally intended to protect contractors, subcontractors, suppliers, and laborers who have not been paid for work that improved real property. The claimant typically must show that:

  • Work or materials were provided for the property;
  • The work was authorized or sufficiently connected to the owner’s project;
  • Money remains unpaid; and
  • Required notices, filing steps, and deadlines were followed.

A lien may be filed even when you paid the general contractor in full but the contractor failed to pay a subcontractor or supplier. Whether that can happen, and whether special protections apply to homeowners, varies by location.

A recorded lien is usually a claim or security interest, not a final judgment that money is owed. You may be able to challenge it if the claimant was paid, filed late, claimed the wrong amount, failed to give required notice, or did work outside the agreed project. In some places, a lien can be removed or reduced by filing a bond or other security.

A claimant normally must enforce the lien through a court action within a further deadline. If the claimant succeeds, the court may order a sale of the property to satisfy the debt, subject to mortgage rights and other priorities. This is uncommon compared with settlement or payment, but it is the reason a lien should not simply be ignored.

Common processes

  1. Check the land records. People commonly obtain the recorded lien, related notices, and the property title record from the county recorder, land registry, or similar office. The documents may identify the claimant, contractor, project, amount claimed, recording date, and legal description of the property.
  1. Compare the lien with the contract and payment records. Useful records include the written contract, change orders, invoices, canceled checks, bank transfers, payment applications, receipts, and communications. People often check whether the claimed work was actually performed and whether the amount includes unauthorized extras, interest, or unrelated charges.
  1. Ask for an itemized explanation and release. A homeowner may contact the contractor or claimant to request an accounting and a signed release of lien after payment or settlement. A conditional release can take effect only when a payment clears; an unconditional release may be broader, so the wording matters.
  1. Check whether a notice or response is required. Some jurisdictions require the claimant to give a preliminary notice, notice of intent to lien, or notice of unpaid amount. An owner may have a short period to dispute the lien, demand enforcement, or request an itemization. Missing a response deadline can affect available remedies.
  1. Consider payment, settlement, or security. People sometimes resolve the dispute by paying the undisputed amount, negotiating a reduced amount, placing money in escrow, or providing a bond or other security to transfer the lien away from the property. A written agreement should explain whether the claimant will release and discharge the lien.
  1. Use a court or administrative procedure when necessary. Depending on the location, a party may seek an order removing an invalid lien, bring a claim for breach of contract or defective work, or defend a foreclosure action. Some construction-payment disputes can be sent to adjudication or arbitration instead of proceeding immediately in court.
  1. Confirm that the public record is cleared. After resolution, people commonly obtain and record a discharge, release, satisfaction, withdrawal, or court order. They may also give the document to a title company or lender. A private promise that the lien is gone does not necessarily update the land records.

Deadlines and time limits

Deadlines are among the most important parts of lien law. Common ranges include:

  • A preliminary notice may be due within roughly 10 to 60 days after first work or delivery, where that type of notice is required.
  • A lien claim may need to be recorded within roughly 30 to 120 days after completion, substantial completion, termination, or the claimant’s last qualifying work.
  • A lawsuit to enforce the lien may need to be filed within roughly 30 days to two years after recording, depending on local law.
  • A challenge, demand for itemization, or request to remove a lien may have a deadline of days or weeks.

These are general ranges, not a calculation for a particular property. Completion dates can be disputed, and repair or warranty work may not extend a lien period. Some statutes also provide special rules for owner-occupied homes, public projects, condominiums, and residential construction. You can confirm the applicable deadline with the recording office, court, or a licensed attorney where the property is located.

Documents that usually matter

  • Signed construction contract and all change orders
  • Invoices, payment applications, and account statements
  • Proof of payments, canceled checks, and bank records
  • Preliminary notices, notices of intent, and lien waivers
  • The recorded lien and the property’s title or land-registry record
  • Delivery tickets, timesheets, inspection reports, and photographs
  • Emails, text messages, and letters about delay, defective work, or nonpayment
  • Certificates of completion, termination, or occupancy, where relevant
  • Settlement agreements, bonds, releases, and court orders

How it differs by jurisdiction

United States. Mechanic’s liens are mainly governed by state law, and procedures differ substantially. California, for example, has detailed statutory rules on notices, recording, and enforcement. Texas also has extensive lien rules, including special procedures and notice requirements for residential projects. Other states use different terminology, deadlines, and homeowner protections. A lien may be invalid even if the underlying debt is valid, or the debt may remain enforceable after the lien expires.

Canada. Construction or builders liens are generally governed by provincial and territorial law. Ontario’s Construction Act and British Columbia’s Builders Lien Act are examples, but their notice, holdback, registration, and enforcement rules differ. Ontario projects commonly involve statutory holdbacks and may involve prompt-payment and adjudication procedures. The property owner’s payment history, the identity of the claimant, and the type of property can affect the result.

England and Wales. There is generally no ordinary mechanic’s-lien system equivalent to the common US model for a contractor or subcontractor claiming directly against a house. Unpaid parties may instead use contract claims, adjudication under the Housing Grants, Construction and Regeneration Act 1996, insolvency procedures, or other security arrangements. A court judgment can sometimes support enforcement against property, but that is a different process from recording a mechanic’s lien.

Australia. Australia generally does not use the same ordinary mechanic’s-lien system as many US states. Each state and territory has its own construction-payment and security-of-payment legislation. For example, New South Wales and Victoria provide statutory payment-claim and adjudication processes, while security interests or court orders may be relevant in other situations. The precise remedy depends on the state or territory, the contract, and whether the project is residential.

When people consult a lawyer

A property or construction lawyer is particularly useful when:

  • The lien is already recorded;
  • The claimed amount is substantial;
  • A foreclosure or enforcement lawsuit has been filed;
  • You paid the general contractor but a subcontractor claims nonpayment;
  • The work was defective, incomplete, or unauthorized;
  • You are selling, refinancing, or facing a title-insurance problem;
  • You are considering signing a release, settlement, or bond; or
  • The deadline for challenging or enforcing the lien may be close.

A title company, land-registry office, building department, or construction mediator may also explain procedural information, but they generally cannot advise you on the best legal response.

Primary sources

  • StatuteCalifornia Civil Code, §§ 8000–9566, California, United States.United States (federal)
  • StatuteTexas Property Code, Chapter 53, Texas, United States.United States (federal)
  • StatuteOntario Construction Act, R.S.O. 1990, c. C.30, Ontario, Canada.Canada
  • StatuteBritish Columbia Builders Lien Act, S.B.C. 1997, c. 45, British Columbia, Canada.Canada
  • StatuteHousing Grants, Construction and Regeneration Act 1996, Parts II and VIII, England and Wales.England & Wales
  • StatuteNew South Wales Building and Construction Industry Security of Payment Act 2021, New South Wales, Australia.England & Wales
  • StatuteBuilding and Construction Industry Security of Payment Act 2002, Victoria, Australia.Australia
  • Official sourceOfficial land-registry, court, and construction-payment guidance for the relevant state, province, territory, or country .See citationMarked “not verified” when this guide was written; confirm against the official source.

Links go to official or widely used free sources. Check that a source is current before relying on it. Browse all sources →

Last updated
Sep 26, 2026
Jurisdiction
General — United States, England & Wales, Canada, Australia
Written by
House Legal editorial (AI-generated, earlier format)