INSIGHT · LICENSING & COMPLIANCE

Builders' warranty periods differ by state, and each Act starts its own clock.

25 October 2026

Statutory warranty periods for residential building work differ by state, and so do the events that start them. As read on 25 October 2026: NSW, 6 years for a major defect and 2 years otherwise, from completion; Queensland, 6 years for a structural defect and 1 year otherwise; South Australia, 5 years from completion; Tasmania, 6 years from practical completion; the ACT, 6 years for structural elements and 2 years otherwise. Victoria bars most building actions 10 years after the occupancy permit. A contract's defects liability period is a separate term.

A crack running down a white plastered wall

Analysed 25 October 2026 · Home Building Act 1989, Design and Building Practitioners Act 2020 and Environmental Planning and Assessment Act 1979 (NSW) · Domestic Building Contracts Act 1995, Version 094, and Building Act 1993, Version 152 (Vic) · QBCC Act 1991 and QBCC Regulation 2018 (Qld) · Building Work Contractors Act 1995 and Planning, Development and Infrastructure Act 2016 (SA) · Home Building Contracts Act 1991 and Building Services (Complaint Resolution and Administration) Act 2011 (WA) · Residential Building Work Contracts and Dispute Resolution Act 2016 and Building Act 2016 (Tas) · Building Act 2004 and Building (General) Regulation 2008 (ACT) · Building Act 1993 (NT) · all read 25 October 2026.

Key takeaways

Two-tier periods in three jurisdictions: NSW: 6 years for a breach that results in a major defect, 2 years otherwise (Home Building Act 1989 s 18E). Queensland: 6 years for a structural defect, 1 year otherwise (QBCC Act 1991 sch 1B s 29). ACT: 6 years for a structural element, 2 years otherwise (Building (General) Regulation 2008 s 38).
Single periods in two more: South Australia: proceedings within five years after completion, a period that 'may not be extended' (Building Work Contractors Act 1995 s 32(5), (6)). Tasmania: within 6 years after the date of practical completion (Residential Building Work Contracts and Dispute Resolution Act 2016 s 32(1)).
Victoria and WA work differently: Victoria's Domestic Building Contracts Act implies warranties (s 8) and its Building Act bars a building action more than 10 years after the occupancy permit (s 134(1)), subject to s 134(2) for cladding actions, up to 15 years, and s 134(2A) where a court extends the period. WA implies a term that the builder makes good defects notified within 4 months of practical completion (s 11), and a building service complaint is out of time after 6 years.
Six years and six months is an insurance figure: In Queensland the 6 years and 6 months period belongs to the statutory insurance scheme in the QBCC Regulation 2018, not to the statutory warranty in the Act.
We would store the completion event with its evidence: A system-design recommendation: every job record carries the event each Act counts from (completion, practical completion, occupation certificate, occupancy permit) with its date and document, because the warranty clock cannot be reconstructed without it.

Statutory warranty periods, by state

Each row quotes the instrument as read on 25 October 2026. Most are periods for commencing proceedings; in the ACT the warranties themselves end (s 88(4)); WA's s 11 is a notification window and NT's s 54B(2) an effect period. The event that starts each one is part of the rule.

Victoria's 10-year limit and WA's 6-year limit are not warranty periods: s 134 limits building actions, and WA's s 6 limits complaints to the Building Commissioner. They sit in the table because they are the time limits those states' Acts state for defective work. Nothing here determines when any particular claim falls out of time.

State	Instrument and section	Period, as the instrument states it	When it starts	Read
NSW	Home Building Act 1989 ss 18B, 18E(1); version for 10 June 2026 to date	6 years for a breach that results in a major defect; 2 years in any other case; a further 6 months if the breach becomes apparent in the last 6 months; an extension where a strata building bond is lodged (s 18E(1A))	Completion of the work (s 3B: as the contract defines it, otherwise practical completion; s 3C: for a new strata building, the occupation certificate for the whole building); if not completed, termination, the day work ceased, or the contract date (s 18E(1)(d))	25 October 2026
Victoria	Domestic Building Contracts Act 1995 s 8 (Version 094, as at 1 July 2026); Building Act 1993 s 134 (Version 152, as at 16 September 2026)	s 8 implies the warranties and states no period; a building action cannot be brought more than 10 years after the occupancy permit or certificate of final inspection (s 134(1)), subject to s 134(2) (cladding building actions, up to 15 years) and s 134(2A) (court extension)	Issue of the occupancy permit, or if none, the certificate of final inspection	25 October 2026
Queensland	QBCC Act 1991 sch 1B s 29(3); version from 1 February 2026	6 years for a breach that results in a structural defect, as prescribed by regulation; 1 year in any other case; a further 6 months if apparent in the last 6 months	Completion of the work; if not completed, termination, the day work ceased, or the contract date	25 October 2026
South Australia	Building Work Contractors Act 1995 s 32(5), (6); current version from 15 January 2026	Within five years after completion; the period may not be extended	Completion of the building work	25 October 2026
Western Australia	Home Building Contracts Act 1991 s 11 (as at 5 April 2023); Building Services (Complaint Resolution and Administration) Act 2011 s 6(1)(b) (as at 25 September 2025)	Builder liable to make good defects notified in writing within 4 months, or a longer period the contract provides; a building service complaint is out of time if made more than 6 years after completion of the service	Practical completion (s 11); completion as prescribed, otherwise the date the service was last carried out (s 6(2))	25 October 2026
Tasmania	Residential Building Work Contracts and Dispute Resolution Act 2016 s 32(1); version in force 25 October 2026	Within 6 years after the date of practical completion	Practical completion; s 32(3) gives fallback dates for a successor in title who cannot establish it	25 October 2026
ACT	Building Act 2004 s 88(4) (Republication 56); Building (General) Regulation 2008 s 38 (Republication 52), both effective 1 October 2026	6 years for work on a structural element; 2 years for work on a non-structural element	Completion day: the later of completion and the end of the contract, and no later than any certificate of occupancy (s 85)	25 October 2026
Northern Territory	Building Act 1993 s 54B(2), as in force at 10 February 2026	Consumer guarantees have effect for the period prescribed by regulation	Not verified (25 October 2026): no prescribed period found in the Building Regulations 1993 as in force at 30 March 2026	25 October 2026

What counts as major or structural,
in the instruments' words

Quoted as the instruments word them. Whether a particular defect falls within a definition is a question for the parties, the regulator, a tribunal or a court, and is not determined here.

NSW: major defect, s 18E(4): A defect in a major element of a building attributable to defective design, defective or faulty workmanship, defective materials, or a failure to comply with the structural performance requirements of the National Construction Code, that causes or is likely to cause the inability to inhabit or use the building for its intended purpose, its destruction, or a threat of collapse. Also a defect prescribed by regulation, and the use of a building product in contravention of the Building Products (Safety) Act 2017.
NSW: major element, s 18E(4): An internal or external load-bearing component essential to the stability of the building, including foundations and footings, floors, walls, roofs, columns and beams; a fire safety system; waterproofing; or another element prescribed by regulation.
ACT: structural element, Regulation s 38(2): A load-bearing component of the building essential to its stability, or a component (including weatherproofing) forming part of the external walls or roof. A non-structural element is any component that is not a structural element.
Queensland: structural defect 'as prescribed by regulation': Schedule 1B s 29(3)(a) leaves the term to regulation. In the QBCC Regulation 2018, the definition we found is written 'for primary insurable work' in the insurance schedule: for a residence, footing or slab movement so the building no longer complies, non-compliance with NCC part B1 or part 2.1, a defect causing the building to be uninhabitable or not reasonably accessible, a health or safety defect, or water penetration.

Queensland has two clocks,
in two instruments.

The QBCC Act sets the warranty period: 6 years for a structural defect and 1 year otherwise, from completion, plus 6 months if the breach becomes apparent in the last 6 months of the period (sch 1B s 29).

The QBCC Regulation 2018 sets when a consumer can claim assistance under the statutory insurance scheme. For a structural defect, the consumer must first become aware of it within 6 years and 6 months after the cover commencement day; for a defect that is not structural, within 6 months after the work is substantially complete (sch 6 s 16). Claims must then be made within 3 months of becoming aware of a structural defect, or within 7 months after substantial completion for another defect.

The two run from different events. 'Completion' for a domestic building contract is defined in sch 1B; 'substantially complete' in the Regulation includes the final payment being made or the residence being occupied. A defect record that stores only one date cannot answer both.

Longer limits that sit
behind the warranties

Most jurisdictions also cap how late an action for defective building work can be brought, in each instrument read here at 10 years.

Construction work under the NSW duty of care includes building work, design, the manufacture or supply of a building product used for building work, and supervising or project managing that work (s 36). Suppliers and manufacturers are within its definition.

NSW: 10 years after completion: Environmental Planning and Assessment Act 1979 s 6.20: a civil action for loss or damage arising out of defective building work cannot be brought more than 10 years after completion, with completion taken as the date of the occupation certificate or, failing one, a compliance certificate, the certifier's final inspection or first occupation. It does not extend any limitation period under the Limitation Act 1969 or the Home Building Act 1989.
NSW: the statutory duty of care: Design and Building Practitioners Act 2020 s 37: a person who carries out construction work has a duty to exercise reasonable care to avoid economic loss caused by defects, owed to each owner and each subsequent owner. Schedule 1 cl 5 extends it to earlier work where the loss first became apparent within the 10 years before s 37 commenced, or becomes apparent on or after that commencement.
South Australia and Tasmania: 10 years: Planning, Development and Infrastructure Act 2016 (SA) s 159: no action for economic loss or rectification costs from defective building work more than 10 years after completion, a period that cannot be extended. Building Act 2016 (Tas) s 327(7)(a): 10 years for permit or notifiable work from accrual, which s 327(2) ties to the occupancy permit, first occupation, 2 years after the building permit, or completion; 6 years for low-risk work.
Victoria, ACT and NT: 10 years: Building Act 1993 (Vic) s 134(1), from the occupancy permit, subject to s 134(2) and (2A); Building Act 2004 (ACT) s 142, from the certificate of completion, last inspection or first occupation; Building Act 1993 (NT) s 160, from the grant of occupancy certification or first occupation.

A defects liability period
is a contract term.

A defects liability period is whatever the contract says it is: a time during which the builder agrees to return and rectify. The statutory warranties are implied by the Acts whatever the contract says, and these provisions void terms that try to remove them: NSW s 18G, Victoria s 10 (except for a breach known or reasonably knowable when the contract was signed), Queensland sch 1B s 28 and NT s 54BA.

WA is the exception in form. Its s 11 is itself an implied contract term, with a 4-month notification window that a contract may lengthen (s 11(1a)), and its definition of defect excludes a failure 'for which the builder is specifically declared by the contract to be not liable' (s 11(2)).

NSW also places duties on the person with the benefit of the warranty: to make reasonable efforts to give written notice of a breach within 6 months after it becomes apparent, and not to unreasonably refuse access for rectification (s 18BA). A tribunal or court must take a failure to allow reasonable access into account.

What a defect record has to hold

The Acts tie their periods to dates and to classifications. These are the fields a record needs if it is to be read against them later.

Field	Why the instruments make it load-bearing
Completion event, its date and the document	Each Act counts from a different event: completion, practical completion, the occupation certificate, the occupancy permit or the completion day.
Date identified and date it became apparent	NSW s 18E(1)(e), (f) and Queensland s 29(2), (4) extend the period by 6 months where a breach becomes apparent in the last 6 months.
Location, element and trade	Major element (NSW) and structural element (ACT) are defined by the part of the building, so the element has to be recorded, not only the room.
Photo or test reference	Shows the condition on the identified date, before rectification changes it.
Classification considered, and by whom	The statutory definition the defect was assessed against, and the person who assessed it. The record holds a person's view, not a determination.
Notice and access dates	NSW s 18BA: written notice within 6 months after the breach becomes apparent, and reasonable access for rectification.
Rectification date and sign-off	Who rectified, when, and who accepted the work.

What we would put in a system

For each residential job, we would test whether the record can answer three questions without anyone reconstructing dates from email: which instrument applies, which event started its clock, and what each defect was classified as and by whom.

Where agents help here is narrow. A compliance agent can read a handover document or occupation certificate and draft the completion event, flag defects whose period is close to ending under the instrument recorded against the job, and draft a defect record from site photos and notes, and a person confirms each. No agent decides whether a defect is major or structural, whether a claim is in time, or whether a warranty has been breached.

Questions worth asking
of your own defect records

For a builder working in NSW and Queensland: does each job record say which completion event started the warranty clock?

NSW s 3B counts from completion as the contract defines it, or practical completion, presumed from the earliest of handover, last attendance or the occupation certificate. Queensland counts from completion as defined in sch 1B. General information as read on 25 October 2026, not legal advice.

For a subcontractor in NSW: do your records treat the head contract and your subcontract as carrying the same warranties?

Home Building Act s 18B(2) states the statutory warranties are also implied in a contract between a principal contractor and a subcontractor for residential building work. General information as read on 25 October 2026, not legal advice.

For a building-product manufacturer or supplier supplying NSW work: is product traceability kept for 10 years?

The Design and Building Practitioners Act 2020 includes the manufacture or supply of a building product in construction work for its duty of care, and the EP&A Act s 6.20 limit is 10 years after completion. General information as read on 25 October 2026, not legal advice.

For a developer selling ACT or NSW homes: is the classification on each defect recorded with the definition it was assessed against?

NSW defines major defect and major element; the ACT defines structural element, including weatherproofing of external walls and roof. A classification with no definition attached cannot be checked later. General information as read on 25 October 2026, not legal advice.

Questions people ask
about builders' warranty periods

How long is a builder liable for defects in NSW?

Under the Home Building Act 1989 s 18E, proceedings for breach of a statutory warranty must start within 6 years for a breach that results in a major defect and 2 years in any other case, from completion of the work, with a further 6 months if the breach becomes apparent in the last 6 months. A 10-year limit on actions for defective building work applies under the EP&A Act s 6.20. General information as read on 25 October 2026, not legal advice.

What is the builders warranty period in Queensland?

QBCC Act 1991 sch 1B s 29: 6 years for a breach that results in a structural defect, as prescribed by regulation, and 1 year in any other case, from completion, plus 6 months if the breach becomes apparent late in the period. The 6 years and 6 months often quoted is the insurance scheme's period in the QBCC Regulation 2018. General information as read on 25 October 2026, not legal advice.

How long is a building contractor liable for work in South Australia?

The Building Work Contractors Act 1995 s 32(5) requires proceedings for breach of a statutory warranty to be commenced within five years after completion of the building work, and s 32(6) states that period may not be extended. General information as read on 25 October 2026, not legal advice.

What is a defects liability period in construction?

It is a contract term: the period, set by the contract, during which the builder agrees to rectify defects. It is separate from the statutory warranty periods in each state's Act, which apply whatever the contract says, and several Acts void terms that try to remove those warranties. General information as read on 25 October 2026, not legal advice.

What counts as a major defect in NSW?

Section 18E(4) of the Home Building Act 1989 defines a major defect as a defect in a major element (load-bearing components, a fire safety system or waterproofing) caused by defective design, workmanship or materials, or non-compliance with the NCC structural performance requirements, that causes or is likely to cause inability to use the building, its destruction or a threat of collapse. General information as read on 25 October 2026, not legal advice.

What this analysis
does and does not show.

Evidence note

What it shows: The statutory warranty periods, or the nearest stated time limit, for residential building work in NSW, Victoria, Queensland, South Australia, WA, Tasmania, the ACT and the NT, the event each counts from, the definitions of major and structural defects where an instrument gives one, and the 10-year limits on building actions, as read on 25 October 2026 on each jurisdiction's legislation register.
Key facts quoted: NSW 6 years major defect, 2 years otherwise, s 18E; Queensland 6 years structural, 1 year otherwise, sch 1B s 29; SA five years, s 32(5); Tasmania 6 years, s 32(1); ACT 6 and 2 years, Regulation s 38; WA 4 months notification, s 11, and 6-year complaint limit, BSCRA s 6; 10-year action limits in NSW (EP&A s 6.20), Victoria (s 134(1), subject to (2) and (2A)), South Australia (PDI Act s 159), Tasmania (Building Act 2016 s 327(7)(a)), the ACT (s 142) and the NT (s 160).

The NSW register was read in a visible browser window and the SA register through a rendering proxy, because both sites block automated access; the texts are saved with the article.
The NT period for consumer guarantees is prescribed by regulation and was not found in the Building Regulations 1993 as read; it is marked not verified.
Queensland's Act refers to a structural defect 'as prescribed by regulation'. The definition quoted is the one we found in the QBCC Regulation 2018, written for the insurance scheme; we did not find a separate prescription for sch 1B.
Insurance claim periods (other than Queensland's, for contrast), the Limitation Act in each state, the Residential Apartment Buildings (Compliance and Enforcement Powers) Act 2020 (NSW) and Australian Consumer Law guarantees are not covered.
Periods are stated as the instruments word them. Nothing here determines whether a defect is major or structural, when any claim falls out of time, or what any party should do.
Nothing here is legal advice.

Bring us one handover file and its defect list.

Send us a completed job's handover documents and its defect register. We will show you which completion event each state's Act counts from, and which fields your records would need to answer a warranty question later.

General information about published legislation, as read on 25 October 2026 at the versions listed in the sources. Not legal advice, and it does not determine whether any defect is major or structural or whether any claim is in time. Covers NSW, Victoria, Queensland, South Australia, Western Australia, Tasmania, the ACT and the NT, with the NT period not verified.

Send us the handover file · Compliance

Sources

Suggested citation: statutory warranty and limitation provisions of the Home Building Act 1989 (NSW), Domestic Building Contracts Act 1995 and Building Act 1993 (Vic), QBCC Act 1991 (Qld), Building Work Contractors Act 1995 (SA), Home Building Contracts Act 1991 and Building Services (Complaint Resolution and Administration) Act 2011 (WA), Residential Building Work Contracts and Dispute Resolution Act 2016 (Tas), Building Act 2004 (ACT) and Building Act 1993 (NT), at the versions listed, as read 25 October 2026. Derived figures: none.