Construction Liens, Surety Bonds and Security of Payment in NSW

Introduction

Effectively managing construction projects in NSW requires more than just technical expertise; it demands a solid grasp of the legal frameworks that protect the financial interests of everyone involved. Two of the most important tools in this regard are construction liens and surety bonds, which are essential for ensuring fair compensation and adherence to contractual obligations.

This guide provides essential information for contractors, suppliers, and project owners on navigating the complexities of these financial security instruments. Understanding the distinct roles of surety bonds and construction liens, alongside the rights established by the Building and Construction Industry Security of Payment Act 1999 (NSW), is fundamental to managing risk and knowing how to deal with a disputed progress claim.

Check Your Rights to Claim Payment, Liens & Construction Bonds

What Is a Construction Lien

Common Law Possessory Liens

Common law possessory liens require the person holding the lien (the lienholder) to have physical possession of the property to enforce their claim. Depending on the scope, these liens can be categorised into two main types:

• A general lien, which applies to all the owner’s property currently in the lienholder’s possession.
• A specific or particular lien, which targets only the specific items that have been worked on to secure payment for services rendered to that particular property.

Equitable Liens

An equitable lien is a remedy imposed by a court to ensure fairness and justice between parties, and may be granted even when the formal requirements for other types of liens have not been met. Courts create equitable liens specifically to prevent one party from being unjustly enriched at another’s expense, and to provide a security interest over property to satisfy a debt where it is fair to do so. 

Statutory Liens

Statutory liens are created and governed by specific legislation. Unlike common law liens, they often do not require the lienholder to have physical possession of the property to enforce their rights.

A key example in NSW is the right provided under the Building and Construction Industry Security of Payment Act 1999 (NSW). Under this legislation, the Act allows a claimant to exercise a lien over unfixed plant or materials they supplied for a project if a progress payment becomes overdue.

Contractual Liens

Contractual liens are established through the explicit terms of an agreement between the parties, meaning the right to the lien is created directly within the contract itself. The contract will specify the exact conditions under which one party can place a lien on the other’s property as security for payment or performance of an obligation. 

What Is a Construction Surety Bond

The Three-Party Structure of Surety Bonds

A construction surety bond is a financial instrument purchased by a contractor to protect the project owner from losses arising from the contractor’s failure to pay, underperformance, or default. Unlike an insurance policy that protects the policyholder, a surety bond is designed to safeguard the project owner’s interests. The agreement involves three main parties: 

• The Principal: This is the contractor or subcontractor who purchases the bond and is obligated to perform the work as specified in the contract.
• The Surety Company: This entity provides the financial guarantee. If the principal fails to meet their obligations, the surety company steps in to either complete the project or compensate the project owner.
• The Obligee: This is the project owner or public agency that requires the bond. The obligee is the beneficiary and can make a claim against the bond if the principal defaults.

Key Types of Construction Surety Bonds

In the construction industry, several types of surety bonds are used to address different risks throughout a project’s lifecycle. Each bond offers specific protections for the project’s stakeholders.

The most common types of construction surety bonds in NSW include:

• Bid Bonds: These provide a guarantee that a contractor who wins a bid will enter into the contract and furnish the required performance and payment bonds. A bid bond protects the project owner from financial loss if the winning bidder withdraws their bid.
• Performance Bonds: This type of bond ensures that the contractor will complete the project according to the terms and specifications of the contract. If the contractor defaults, the surety company is responsible for covering the costs to finish the project with another contractor.
• Payment Bonds: These are designed to protect subcontractors and suppliers. A payment bond guarantees that they will be paid for the labour and materials they provide, even if the principal contractor fails to pay them.
• Maintenance Bonds: Activated after the project is completed, a maintenance bond ensures the contractor will rectify any defects that appear during a specified maintenance period.
• Subdivision Bonds: Often required for large-scale developments, these bonds guarantee that the contractor will complete essential public infrastructure, such as roads and utilities, as part of the project.
• License and Permit Bonds: These bonds are necessary for contractors to obtain the required legal permits and licenses. They ensure that the contractor will adhere to all relevant industry regulations and standards, protecting the public from non-compliant work.

Distinguishing Between Surety Bonds and Construction Liens

Liens for Private Construction Projects

On private construction projects in NSW, a construction lien grants the claimant a direct security interest in the property they have worked on, creating a legal claim equal to the value of the unpaid work or materials. This can affect the owner in several practical ways: 

• It immediately hinders the owner’s ability to sell or refinance the property until the debt is cleared.
• If payment remains outstanding, the claimant may file a foreclosure lawsuit that can compel the property’s sale to satisfy the debt.

Bonds for Public Construction Projects

For public construction projects, surety bonds replace mechanics liens because publicly owned property cannot be encumbered. A payment bond serves as the primary form of security, ensuring subcontractors and suppliers receive what they are owed by guaranteeing access to a pool of money reserved for settling legitimate claims. It also prevents claimants from seeking an interest in the public asset.

Rights and Obligations Under the NSW Security of Payment Act

The Impact of Licensing and Insurance on Payment Rights

A significant amendment to the Building and Construction Industry Security of Payment Act 1999 (NSW) on 20 August 2024 altered the payment rights for contractors on certain residential projects. The introduction of Section 8(2) of the SOP Act 1999 (NSW) now removes the statutory right to receive a progress payment for unlicensed or uninsured contractors.

This change specifically affects those performing residential building work governed by the Home Building Act 1989 (NSW). Under the amended law, a contractor is not entitled to a progress payment if they:

• Do not hold a valid contractor licence as required by the Home Building Act 1989 (NSW), which is regulated by NSW Fair Trading.
• Have failed to obtain the necessary insurance through the Home Building Compensation Fund.

This marks a direct reversal of the previous legal position, under which an adjudicator was generally unable to consider a contractor’s licensing or insurance status when determining a payment claim — a position confirmed in McVitty v BPB Earthmoving Pty Ltd [2025] NSWCA 103. Consequently, the Building Commission NSW now has a clearer framework for enforcement in this area. 

Enforcing Payments and Exercising a Lien

The Building and Construction Industry Security of Payment Act 1999 (NSW) provides a direct mechanism for claimants to secure overdue payments for materials supplied to a project. Under Section 11(3) of the SOP Act 1999 (NSW), a claimant has a statutory right to exercise a lien over unfixed plant or materials once a progress payment becomes due and has not been paid. This right applies to any materials supplied for use in the construction work that have not yet been incorporated into the building structure. 

Should a payment dispute arise, the matter can be referred to adjudication for a determination through the following steps:

• The claimant can reach out to an Authorised Nominating Authority (ANA), such as Adjudicate Today.
• The ANA will then appoint an independent adjudicator to resolve the dispute swiftly.

Understanding Key Timeframes & Pending Reforms

Under the current framework of the Building and Construction Industry Security of Payment Act 1999 (NSW), a respondent has a strict timeframe to reply to a payment claim. They must provide a payment schedule within 10 business days of receiving the claim, or within a shorter period if specified in the contract.

A pending legislative change may affect these timeframes. The Fair Trading and Building Legislation Amendment Bill 2026, which was before the NSW Parliament as of April 2026, proposes to replace the term ‘business day’ with ‘working day’ throughout the Act. As this reform had not yet been enacted at the time of writing, the current 10-business-day requirement remains the operative law. 

The Role of Lien Waivers in Mitigating Risk

A lien waiver is a legal document through which a contractor, subcontractor, or supplier gives up the right to place a lien on a property once payment is received. It serves as proof that the party has been paid for their work and will not make future claims against the property for that specific payment.

While lien waivers were traditionally more common in other countries, they are now becoming increasingly important in the Australian construction industry. Industry bodies and government alike recognise their value in reducing payment disputes and minimising project delays. Stakeholders view lien waivers as beneficial for several reasons:

• They help in reducing payment disputes between contractors, subcontractors, and property owners.
• They contribute to minimising project delays that can arise when payments are contested.
• They provide property owners with assurance of payment, confirming that completed work is free from future claims.

Lien waivers also play a crucial role in securing project financing, with many lenders now requiring them before releasing funds for construction loans. Lenders favour lien waivers because they: 

• Ensure the property maintains a clear title that can be used confidently as collateral.
• Protect the lender’s investment by shielding it from payment disputes that could otherwise complicate or derail the project.

However, parties should seek legal advice before signing any document that purports to waive lien rights, as the consequences can affect their ability to recover payment if a dispute arises later.

Conclusion

The dual frameworks of construction liens and surety bonds are pivotal in safeguarding financial interests and ensuring the smooth execution of construction projects in NSW. These mechanisms, governed by the Building and Construction Industry Security of Payment Act 1999 (NSW), establish a foundation of trust and reliability that is critical to the success of any construction endeavour.

Navigating the legal landscape of surety bonds and construction liens in NSW can be daunting, but our team at PBL Law Group is here to guide you through every step. For trusted expertise in ensuring your rights are protected and your interests are secured, contact PBL Law Group’s experienced building and construction lawyers today to request a consultation.

Frequently Asked Questions