Key Takeaways
- Defective building work in Queensland is defined broadly under Schedule 1B of the Queensland Building and Construction Commission Act 1991 (Qld) and includes work that deviates from plans and specifications, breaches the National Construction Code, or is not completed with due care and skill.
- The implied warranties under Schedule 1B of the QBCC Act (formerly the Domestic Building Contracts Act 2000 (Qld)) cannot be excluded by contract, meaning residential owners retain statutory rights even if their builder attempts to limit liability by contract term.
- Homeowners must give their builder written notice of defects before lodging a QBCC complaint, and for Home Warranty Insurance claims must act within 3 months of discovering a structural defect or 7 months of practical completion for a non-structural defect.
- The QBCC recovered $5.25 million across 694 monies-owed complaints in 2025-26, demonstrating the Commission’s active role in resolving residential building disputes (QBCC Annual Report 2025-26).
- Claims for defective building work are subject to a 6-year limitation period under the Limitation of Actions Act 1974 (Qld) for contract claims, and 3 years from date of discoverability for negligence claims; missing these deadlines extinguishes your right to sue.
Defective building work in Queensland can give rise to claims against the builder under the domestic building contract warranties in the Queensland Building and Construction Commission Act 1991 (Qld), QBCC complaints, Home Warranty Insurance claims, and common law negligence actions. Whether you are a homeowner living with cracked walls and leaking roofs, a developer managing a defective apartment complex, or a contractor facing a defect claim from your principal, Queensland’s legal framework provides specific rights and remedies, but strict deadlines and procedural steps apply. Acting quickly and correctly is critical.
Our building and construction lawyers in Brisbane regularly act in defective building work disputes on both sides, advising owners on their rights and assisting contractors in responding to defect claims. This guide explains the law, the process, and what you need to do.
What Is Defective Building Work?
Defective building work is not simply work you are unhappy with. Under Queensland law, defective work has a specific legal meaning that determines what remedies are available to you.
Under the QBCC Act and the associated Schedule 1B, building work is defective where it:
- deviates from the approved plans and specifications for the project;
- fails to comply with the National Construction Code (NCC), formerly the Building Code of Australia (BCA), or other applicable standards;
- was not carried out with due care and skill;
- uses materials that are not new, not fit for purpose, or not of acceptable quality; or
- does not comply with applicable laws and legal requirements in force at the time the work was carried out.
Queensland law distinguishes between two categories of defect, with different remedies and timeframes applying to each:
Structural defects are defects that affect the structural integrity, waterproofing, or load-bearing capacity of the building. Examples include foundations that have subsided or settled, structural cracking, roof framing defects, and waterproofing failures that allow water ingress into the building envelope. The law treats structural defects as more serious, providing a longer remedy window.
Non-structural (cosmetic) defects are defects that affect the appearance or finish of the building without compromising its structural integrity. Examples include uneven rendering, paint defects, poorly fitted cabinetry, and cosmetic tiling issues. These defects are actionable but attract shorter complaint timeframes.
Implied Warranties Under the QBCC Act
For residential building work in Queensland, the most important consumer protection is the set of implied statutory warranties that apply to every regulated domestic building contract. These warranties were originally contained in section 26 of the Domestic Building Contracts Act 2000 (Qld) and are now found in Schedule 1B of the QBCC Act following the 2014 legislative reforms that absorbed domestic building contract regulation into the QBCC Act.
The implied warranties provide that a contractor warrants that the building work will be:
- carried out with due care and skill;
- carried out using materials that are new (unless the contract provides otherwise), suitable for the purpose for which they are to be used, and of merchantable quality;
- completed in accordance with the plans and specifications in the contract;
- completed in accordance with all applicable laws and legal requirements, including the NCC; and
- fit for the result the owner tells the contractor they are seeking (where that result is within the scope of the contract).
These warranties are mandatory. Any contract term that attempts to exclude, limit, or modify these warranties is void under the QBCC Act. This means even if a builder inserts a clause into your building contract purporting to limit their liability for defects, that clause cannot override the statutory warranties. You retain your rights regardless.
Importantly, these warranties are enforceable not only by the original owner but by subsequent owners of the property. If you purchase a home and later discover defects in building work carried out on the previous owner’s behalf, you may still have a direct claim against the original contractor under the statutory warranties, subject to the applicable limitation periods.
The warranty period for a breach that results in a structural defect is six years from practical completion of the work. For any other defect, the warranty period is one year from practical completion.
The QBCC Complaints Process
The Queensland Building and Construction Commission (QBCC) is the primary regulator for building and construction work in Queensland. For residential defective work, the QBCC offers a structured complaints and dispute resolution process that must generally be used before escalating to QCAT or the courts.
Who Can Lodge a QBCC Defective Work Complaint?
Any owner of residential property where QBCC-regulated building work has been carried out can lodge a defective work complaint with the QBCC. This includes the original contracting owner and subsequent purchasers of the property.
Pre-Complaint Notice Requirement
Before lodging a QBCC complaint, you must first give your contractor written notice of every defective or incomplete item. The notice must set a reasonable timeframe (typically at least 14 days) for the contractor to remedy the defects. This step is mandatory, the QBCC will require evidence that you gave the contractor a proper opportunity to fix the work before it will investigate your complaint.
If the contractor is bankrupt, insolvent, has had their licence cancelled, has been deregistered, or is deceased, the pre-notice requirement may not apply. In those circumstances, you may proceed directly to a QBCC Home Warranty Insurance claim.
What the QBCC Investigates
Once a complaint is lodged, a QBCC building inspector will assess the work and determine whether defects exist. The QBCC considers whether the work meets the contractual specifications, complies with the NCC, and was performed to the required standard. The Commission can issue a direction to rectify, compelling the licensee to carry out remediation work within a set timeframe.
Failure by a licensed contractor to comply with a QBCC direction to rectify can result in demerit points under the licensing scheme, licence conditions, suspension, or cancellation. This is a significant incentive for licensed contractors to comply. For more detail on the QBCC’s direction to rectify powers, see our post on QBCC directions to rectify in Queensland.
QBCC Home Warranty Insurance
The QBCC operates the Queensland Home Warranty Scheme, which provides insurance coverage for residential building work valued at more than $3,300 (including labour, materials, and GST) carried out by a licensed contractor. The scheme covers residential building work up to a contract value of $3.3 million.
Home Warranty Insurance protects homeowners where:
- a licensed contractor fails to complete contracted residential construction work (and the owner has correctly terminated the contract);
- the contractor fails to rectify defective work after being given the opportunity to do so; or
- the building suffers from subsidence or settlement.
To make a Home Warranty claim for defective work, you must act within specific timeframes: within 3 months of discovering a structural defect (provided it arose within 6 years and 6 months of practical completion), or within 7 months of practical completion for non-structural defects. Missing these windows forfeits your right to make a Home Warranty claim, even if your underlying legal rights against the contractor remain.
The QBCC recovered $5.25 million across 694 monies-owed complaints in 2025-26 (QBCC Annual Report 2025-26), reflecting the significant volume of building dispute activity the Commission resolves each year.
For a detailed guide to making a QBCC Home Warranty Insurance claim, see our article on QBCC Home Warranty Insurance claims in Queensland.
Legal Action Against Your Builder: QCAT and the Courts
Where the QBCC complaints process does not resolve your dispute, or where you need monetary compensation rather than just rectification, legal proceedings are available through QCAT or the Queensland courts.
Queensland Civil and Administrative Tribunal (QCAT)
QCAT has jurisdiction over domestic and commercial building disputes in Queensland. For most residential defective work disputes, the QBCC dispute resolution process must be completed as a prerequisite before a party can apply to QCAT. Once the QBCC has issued a decision or determination, or where the process has concluded without resolution, parties can make a building dispute application to QCAT.
QCAT can hear disputes involving claims across a wide monetary range. For building and construction claims, there is no strict monetary ceiling comparable to the general minor civil claims jurisdiction, QCAT determines jurisdiction based on the nature of the dispute, not solely the dollar amount. However, for high-value claims (typically those exceeding $150,000), the Supreme Court or District Court will generally provide a more appropriate forum with greater procedural rigour and enforcement mechanisms.
QCAT proceedings are designed to be accessible and less formal than court proceedings. Parties can represent themselves, though legal representation is permitted. Given the technical complexity of most defective building work claims, professional legal advice is strongly recommended. Our commercial litigation lawyers in Brisbane regularly appear in QCAT and court proceedings for building and construction clients.
Supreme Court and District Court
For high-value defective building work claims, particularly in commercial construction, multi-unit residential developments, or complex structural defect cases, proceedings in the Supreme Court or District Court of Queensland provide access to more sophisticated procedural tools, including expert evidence, discovery, and court-ordered injunctions. These courts also have stronger enforcement mechanisms for judgments, including examination of judgment debtors and enforcement against assets.
Commercial building disputes (discussed further below) often proceed directly to the courts, bypassing the QBCC framework entirely.
Defective Work in Commercial Construction
The QBCC Home Warranty Insurance scheme applies only to residential building work. Homeowners and developers of commercial properties, offices, retail centres, industrial warehouses, and mixed-use developments, do not have access to Home Warranty Insurance. The dispute resolution landscape for commercial defective building work is therefore different and, in many respects, more complex.
In commercial construction, the primary avenues for addressing defective work include:
Contractual claims: Most commercial construction contracts contain detailed defects liability provisions. These typically impose a defined defects liability period (often 12 months from practical completion) during which the contractor must return to site and remedy defects at their own cost. After the defects liability period, claims for latent defects must be pursued through the courts as breach of contract claims.
Professional indemnity insurance: Where defects arise from negligent design or specification, claims may lie against the architect, engineer, or building certifier under their professional indemnity insurance. The duty of care owed by building practitioners to owners and downstream purchasers has been significantly expanded in recent years, influenced in part by reforms in other Australian jurisdictions.
BIF Act adjudication for payment disputes involving defects: Where defective work gives rise to a payment dispute between a contractor and subcontractor, for example, where a principal contractor refuses to pay a subcontractor because of alleged defects, the Building Industry Fairness (Security of Payment) Act 2017 (Qld) (BIF Act) provides a fast-track adjudication mechanism. An adjudicator can determine the amount owed, taking into account any deduction for defective work, within tight timeframes. This process does not decide legal liability conclusively but provides an interim cash flow solution. For more on BIF Act payment disputes, see our contractor’s guide to security of payment in Queensland.
Common law negligence: Both owners and subsequent property purchasers may have negligence claims against contractors, subcontractors, and building certifiers for defective work that causes economic loss or property damage. Australian courts have developed a nuanced body of law on when a pure economic loss claim arising from defective building work will succeed in negligence.
Limitation Periods for Defective Building Claims
Missing a limitation deadline permanently extinguishes your legal right to pursue a claim, regardless of how strong your underlying case is. Queensland’s limitation rules for defective building work are as follows:
Contract claims: Under the Limitation of Actions Act 1974 (Qld), a claim for breach of contract must be commenced within 6 years from the date the cause of action accrued. For building work, this is generally 6 years from the date the defective work was performed, or from practical completion where the defect relates to the whole of the contracted work.
Negligence claims (tort): The general limitation period for negligence under the Limitation of Actions Act 1974 (Qld) is 3 years from the date the claimant first knew or ought reasonably to have known of the material facts giving rise to the claim. This discoverability rule can extend the effective window for latent defects that do not manifest until years after completion.
QBCC Home Warranty Insurance: Structural defect claims under Home Warranty Insurance must be lodged within 3 months of discovery of the defect, provided the defect arose within 6 years and 6 months of practical completion. Non-structural defect Home Warranty claims must be lodged within 7 months of practical completion.
Statutory warranty claims: The implied warranty period for structural defects under the QBCC Act is 6 years from practical completion. For other defects, it is 1 year from practical completion.
Where multiple limitation periods apply to the same dispute, the shortest relevant deadline must be identified and tracked carefully. Legal advice at the earliest opportunity is essential to ensure no deadline is inadvertently missed.
What to Do If You Discover Defective Building Work
If you discover defects in building work on your Queensland property, follow this five-step action guide:
Step 1: Document everything immediately. Take detailed photographs and video of every defect, including context shots showing the location within the building. Note the date you first observed each defect. Preserve all contracts, variations, plans, and specifications. Save all communications with your builder, including texts and emails.
Step 2: Notify your builder in writing. Send a written notice to your contractor identifying each defect and specifying a reasonable timeframe (at least 14 days) for rectification. Do this by email or registered post so you have a dated record. Keep a copy of everything. This step is a prerequisite to the QBCC complaint process for residential work.
Step 3: Lodge a QBCC complaint. If the builder fails to rectify within the timeframe, lodge a defective work complaint with the QBCC at qbcc.qld.gov.au. Include your written notice to the builder, evidence of the defects (photos, inspection reports), and a copy of your building contract. The QBCC will assign an inspector to assess the work.
Step 4: Obtain independent legal advice. Contact a building and construction lawyer early in this process. A lawyer can help you identify all available claims (contractual, statutory, tortious), calculate the relevant deadlines, gather expert evidence, and represent you in QBCC, QCAT, or court proceedings. Acting without legal advice in a complex building dispute frequently results in missed opportunities or procedural errors that harm your recovery.
Step 5: Preserve your limitation period. Keep a record of the date you first discovered each defect. If you are approaching the limitation period for any claim, take legal advice immediately. In some circumstances, a solicitor’s letter of demand or a formal application can preserve your position while negotiations proceed.
How Boss Lawyers Can Help
Boss Lawyers acts for homeowners, property developers, builders, and subcontractors in building and construction disputes across Queensland. Our experience covers the full range of defective building work matters, from QBCC complaints and Home Warranty Insurance claims through to complex multi-party litigation in the Supreme Court.
We advise and represent clients in:
- Defective work claims under the QBCC Act statutory warranties
- QBCC complaint lodgement, inspection, and dispute resolution
- QBCC Home Warranty Insurance claims (structural and non-structural defects, non-completion)
- QCAT building and construction disputes
- District Court and Supreme Court litigation for high-value defect claims
- BIF Act adjudication in payment disputes involving defective work allegations
- Contractor-side advice on responding to defect notices and rectification obligations
- Developer-side advice on contract review and defects management in commercial projects
If you have discovered defective building work or received a defect notice, contact our building and construction lawyers in Brisbane today for clear, commercial advice on your options. Call Mark Harley on 1300 267 711 or contact us online.
Frequently Asked Questions
What is the difference between a structural defect and a cosmetic defect in Queensland building law?
A structural defect affects the structural integrity, load-bearing capacity, or weatherproofing of a building, examples include subsidence, major cracking in load-bearing walls, or waterproofing failures allowing water ingress. A cosmetic or non-structural defect is one that affects appearance or finish without compromising the building’s structure, examples include uneven render, paint defects, or poorly fitted fixtures. The distinction matters significantly: structural defects attract a 6-year statutory warranty period under the QBCC Act and specific Home Warranty Insurance deadlines, while non-structural defects have a 1-year warranty period and must be reported to the QBCC within 7 months of practical completion for Home Warranty purposes.
Can I go straight to QCAT without going through the QBCC first?
Generally no, for residential building work. Parties must participate in the QBCC dispute resolution process before making a building dispute application to QCAT. However, there are limited circumstances where a party may apply directly to QCAT, for example, where the contractor is insolvent, has had their licence cancelled, or where both parties consent to bypass the QBCC process. For commercial building disputes, the QBCC process does not apply in the same way. A building and construction lawyer can advise on the correct pathway for your specific circumstances.
My builder has gone into liquidation. Can I still make a claim for defective work?
Yes. If your builder has become insolvent, the QBCC Home Warranty Insurance scheme is specifically designed to cover this situation. You can make a Home Warranty Insurance claim directly with the QBCC, subject to the applicable timeframes and the requirement that the work was carried out under a regulated domestic building contract by a licensed contractor. Separately, you may also lodge a proof of debt in the liquidation for your defect-related losses, though recovery as an unsecured creditor is typically limited. For advice on construction company insolvency and creditor rights, see our article on subcontractor and creditor rights when a builder goes into liquidation in Queensland.
I purchased a property and later discovered defects from building work done before I bought it. Do I have a claim?
Potentially yes. Under the QBCC Act, the implied warranties in Schedule 1B run with the building and are enforceable by subsequent owners of the property, not just the original contracting party. If the defective work was carried out under a regulated domestic building contract and you are within the applicable warranty period (6 years for structural defects from practical completion), you may have a direct statutory claim against the original contractor. You may also have claims against the vendor under the property sale contract, or against the building inspector if a pre-purchase building inspection failed to identify the defects. Legal advice is essential to identify all available avenues.
How long does the QBCC defective work complaint process take?
The QBCC complaint process timeline varies depending on the complexity of the defects and the conduct of the parties. Simple matters can be resolved in a matter of weeks where the contractor accepts the inspection findings and carries out rectification promptly. More complex disputes involving disputed findings, appeals, or unresponsive contractors can take several months. Where the QBCC process does not resolve the matter, the dispute moves to QCAT or the courts, adding further time. Given the tight deadlines that apply to Home Warranty Insurance claims in particular, lodging your complaint as early as possible is always advisable.
This is general information only and is not legal advice. You should obtain professional legal advice specific to your circumstances before taking any action in relation to a building dispute. The law is stated as at October 2026. Mark Harley is the Principal Solicitor of Boss Lawyers Pty Ltd (ACN 143 136 645), Brisbane CBD, 32 Turbot Street, Brisbane QLD 4000. Phone 1300 267 711.
